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Authors: Mr. Neil Rogers (Independent Scholar), Dr. Sarah Jayne Hitt Ph.D. SFHEA (NMITE, Edinburgh Napier University)

Topic: Designing a flood warning system to communicate risk.

Tool type: Teaching.

Engineering disciplines: Electronic; Energy; Mechanical.

Keywords: Climate change; Water and sanitation; Renewable energy; Battery Technologies; Recycling or recycled materials; AHEP; Sustainability; Student support; Local community; Environment; Future generations; Risk; Higher education; Assessment; Project brief.

Sustainability competency: Systems thinking; Anticipatory; Strategic; Integrated problem-solving; Normative.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37. Potential alignments with AHEP criteria are shown below.

Related SDGs: SDG 7 (Affordable and Clean Energy); SDG 11 (Sustainable Cities and Communities).

Reimagined Degree Map Intervention: More real-world complexity; Active pedagogies and mindset development; Authentic assessment.

Educational level: Intermediate / Advanced.

Learning and teaching notes:

This resource outlines a project brief that requires an engineer to assess the local area to understand the scale of flooding and the local context. This will highlight how climate change affects everyday life, how water usage is changing and happening on our doorstep.

The project also requires the engineer to be considerate of the needs of a local business and showcases how climate change affects the economy and individual lives, enabling some degree of empathy and compassion to this exercise.

Depending upon the level of the students and considering the needs of modules or learning outcomes, the project could follow either or both of the following pathways:

Pathway 1 – Introduction to Electronic Engineering (beginner/intermediate- Level 4)

LO1: Describe the operation of electronic circuits and associated discrete components (AHEP4: SM1m).

LO2: Compare the operation principles of a variety of electronic sensors and actuators and apply them to a given task (AHEP4: EA2m).

LO3: Interpret how transistors and operational amplifiers function (AHEP4: EA4m).

LO4: Know how amplifiers operate and assess their performance for a given application (AHEP4: EA1m; EA2m).

LO5: Integrate the operation of an actuator, sensor, and power supply into a system for a given task (AHEP4: EA4m; EA6m).

In this pathway, the project deliverables could be in the form of a physical artefact, together with a technical specification.

Pathway 2 – Electromagnetics in Engineering (intermediate/advanced- Level 5)

LO1: communicate the primary challenges inherent in wireless communication (AHEP4: SM1m

LO2: devise solutions to a given design challenge (AHEP4: SM1m; SM3m)
In this pathway, the project deliverable could be in the form of a Technical Report.

This project allows teachers the option to stop at multiple points for questions and/or activities as desired.

Learners have the opportunity to:

analyse local environmental factors that affect river water levels,
appreciate local planning with respect to installing devices on or near a riverbank,
consider how to communicate with a variety of stakeholders,
undertake cost-benefit and value trade-off analysis in the context of using sustainable materials,
undertake cost-benefit and value trade-off analysis in the context of using renewable energy,
practise argument and reasoning related to sustainability dilemmas.

Teachers have the opportunity to:

introduce concepts related to climate change in the local environment,
introduce concepts related to environmental sensors,
introduce concepts related to renewable energy sources,
introduce concepts related to battery systems,
introduce concepts related to local planning laws,
informally evaluate students’ argument and reasoning skills,
integrate technical content in the areas of electrical or mechanical engineering related to water level monitoring,
authentically assess a team activity and individual work.

Learning and teaching resources:

Overview: 

A local business premises near to a river has been suffering from severe flooding over the last 10 years. The business owner seeks to install a warning system that can provide adequate notice of a possible flood situation.

Time frame & structure:
This project can be completed over 30 hours, either in a block covering 2-3 weeks (preferred) or 1 hour per week over the academic term. This project should be attempted in teams of 3-5 students. This would enable the group to develop a prototype, but the Specification (Pathway 1) and Technical Report (Pathway 2) could be individual submissions without collusion to enable individual assessment.

It is recommended that a genuine premises is found that has had the issues described above and a site visit could be made. This will not only give much needed context to the scenario but will also trigger emotional response and personal ownership to the problem.

To prepare for activities related to sustainability, teachers may want to read, or assign students to pre-read the following article:
‘Mean or Green: Which values can promote stable pro-environmental behaviour?’

Context and Stakeholders:

Flooding in the local town has become more prevalent over recent years, impacting homes and businesses. A local coffee shop priding itself on its ethical credentials is located adjacent to the river and is one of the businesses that has suffered from severe flooding over the last 10 years, causing thousands of pounds worth of spoilt stock and loss of revenue. The local council’s flood warning system is far from adequate to protect individuals on a site-by-site basis. So the shop is looking for an individual warning system, giving the manager and staff adequate notice of a possible flood situation. This will enable stock to be moved in good time to a safer drier location. The shop manager is very conscious of wanting to implement a sustainable design that uses sustainable materials and renewable energy, to promote the values of the shop. It is becoming clear that such a solution would also benefit other businesses that experience flooding and a wider solution should also be considered.

Pathway 1

This project requires assessment of the local area and ideally a visit to the retailer to understand their needs and consider options for water level monitoring. You are required to consider environmental and sustainable factors when presenting a solution.

After a visit to the premises:

Discussion: What is your initial reaction to the effects of the flooding and does it surprise you? What might your initial reaction reveal to you about your own perspectives and values?
Discussion: What is your initial reaction to the causes of the flooding and does it surprise you? What might your initial reaction reveal to you about your own perspectives and values?
Discussion and activity: List the potential issues and risks to installing a device in or near to the river bank.
Activity: Research water level monitoring. What are the main technical and logistical issues with this technology in this scenario?
Activity: Both cost-benefit and sustainable trade-off analyses are valuable approaches to consider in this case.  Determine the possible courses of action and undertake both types of analysis for each position by considering both short- and long-term consequences.
Reflection: Obligations to future generations: Do we have a responsibility to provide a safe and healthy environment for humans that don’t yet exist, or for an ecosystem that will eventually change?

Design Process:

To satisfy the learning outcomes identified above the following activities are suggested.

Assessment activity 1 – Physical artefact:

Design, build and test a prototype flood warning device, monitoring various water levels and controlling an output or outputs in an alarm condition to meet the following as a minimum:

a) The device will require the use of an analogue sensor that will directly or indirectly output an electrical signal proportional to the water level.

b) It will integrate to appropriate Operational Amplifier circuitry.

c) The circuitry will control an output device or devices.

d) The power consumption of the complete circuit will be assessed to allow an appropriate renewable energy supply to be specified (but not necessarily be part of the build).

Assessment activity 2 – Technical specification:

The written specification and accompanying drawings shall enable a solution to be manufactured based on the study, evaluation and affirmation of the product requirements.

The evaluation of the product requirements and consequent component selection will reference the use of design tools and problem-solving techniques. In compiling the specification the component selection and integration will highlight the underlying engineering principles that have been followed. The specification shall be no more than 1000 words (plus illustrations and references).

Pathway 2

This project requires assessment of the local area and ideally a visit to the retailer to understand their needs and consider options for water level monitoring.

You are required to consider environmental and sustainable factors when presenting a solution.

After a visit to the premises:

Discussion: What is your initial reaction to the effects of the flooding and does it surprise you? What might your initial reaction reveal to you about your own perspectives and values?
Discussion: What is your initial reaction to the causes of the flooding and does it surprise you? What might your initial reaction reveal to you about your own perspectives and values?
Discussion and activity: List the potential issues and risks to installing a device in or near to the river bank.
Activity: Both cost-benefit and sustainable trade-off analyses are valuable approaches to consider in this case.  Determine the possible courses of action and undertake both types of analysis for each position by considering both short- and long-term consequences.

Wireless communication of information electronically is now commonplace. It’s important for the learners to understand the differences between the various types both technically and commercially to enable the most appropriate form of communication to be chosen.

Pathway 1 above explains the need for a flood warning device to monitor water levels of a river. In Pathway 2, this part of the challenge (which could be achieved in isolation) is to communicate this information from the river to an office location within the town.

Design Process:

Design a communications system that will transmit data, equivalent to the height of the river in metres. The maximum frequency and distance over which the data can be transmitted should be explored and defined, but as a minimum this data should be sent every 20 seconds over a distance of 500m.

Assessment activity – Technical report:

A set of user requirements and two possible technical solutions shall be presented in the form of a Technical Report:

Highlighting the benefits and drawbacks of each.

Explaining the inherent challenges in wireless communication that defined your selections

Design tools and problem-solving techniques should be used to define the product requirements and consequent component selection

The report shall be no more than 3000 words (plus illustrations and references) 

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Author: Dr Lampros Litos (Cranfield University).

Topic: Sustainability in manufacturing.

Tool type: Guidance.

Engineering disciplines:  Aeronautical; Manufacturing, Mechanical.

Keywords: Energy efficiency; Factories; Best practice; Eco-efficiency; Practice maturity model; AHEP; Student support; Sustainability.

Sustainability competency: Critical thinking; Integrated problem-solving.

Related SDGs: SDG 9 (Industry, innovation, and infrastructure); SDG 12 (Responsible consumption and production).

Reimagined Degree Map Intervention: More real-world complexity.

Learning and teaching notes:

The following are a set of use cases for a maturity model designed to improve energy and resource efficiency in manufacturing facilities. This guide can help engineering educators integrate some of the main concepts behind this model (efficient use of energy and resources in factories in the context of continuous improvement and sustainability) into student learning by showcasing case study examples.

Teachers could use one or all of the following use cases to put students in the shoes of a practicing engineer whose responsibility is to evaluate and improve factory fitness from a sustainability perspective.

Supporting resources:

Factory assessment in multiple assembly facilities for an aircraft manufacturer:

The assessment is part of the following use case on this industrial energy efficiency network (IEEN):

The company operates in the aerospace sector and runs 11 manufacturing sites that employ approximately 50000 people across 4 European countries. Most of the sites are responsible for specific parts of the aircraft i.e. fuselage, wings. These parts once manufactured are sent to two final assembly sites. Addressing energy efficiency in manufacturing has been a major concern for the company for several years.

It was not until 2006 that a corporate policy was developed that would formalize efforts towards energy efficiency and set a 20% reduction in energy by the year 2020 across all manufacturing sites. An environmental steering committee at board level was set up which also oversaw waste reduction and resource efficiency. The year 2006 became the baseline year for energy savings and performance measures. Energy saving projects were initiated then, across multiple manufacturing sites. These were carried out as project-based activities, locally guided by the heads of each division and function per site.

A corporate protocol for developing the business case for each project is an initial part of the process. It is designed to assign particular resources and accountabilities to the people in charge of the improvements. Up to 2012, improvement initiatives had a local focus per site and an awareness-raising character. It was agreed that in order to replicate local improvements across the plants a process of cross-plant coordination was necessary. A study on the barriers to energy efficiency in this company revealed three important barriers which needed to be addressed:

Lack of accountability: The site energy manager is responsible for reducing the site’s energy consumption but only has authority to act within a facility’s domain–that is, by improving facilities and services, such as buildings and switchgear. They are not empowered to act within a manufacturing operations parameter. Therefore, no one is responsible for reducing energy demand.
No clear ownership: Many improvements are identified but then delayed due to a lack of funding to carry out the works. This is because neither facilities nor manufacturing operations agree whether the improvement is inside their parameter: typically, facilities claim that it is a manufacturing process improvement, and operations claim that any benefit would be realized by facilities. Both are correct, hence neither will commit resources to achieve the improvement and own the improvement.
No sense of urgency: A corporate target exists for energy reduction–but the planned date for achieving this is 2020.

The solution that the environmental steering committee decided to support, was the creation of an industrial energy efficiency network (IEEN). The company had previously done something similar when seeking to harmonize its manufacturing processes through process technology groups (Lunt et al., 2015). This approach consists of each plant nominating a representative who is taking the lead and coordinating activities. It is expected that the industrial network would contribute to a significant 7% share out of the 20% energy reduction target for the year 2020 since its establishment as an operation in 2012.

The network’s operations are further facilitated with corporate resources such as online tools that help practitioners report and track the progress of current projects, review past ones, and learn about best-available techniques. This practice evolved into an intranet website that is further available to the wider community of practitioners and aims to generate further interest and enhance the flow of information back to the network. Additionally, a handbook to guide new and existing members in engaging effectively with the network and its objective has been developed for wider distribution. These tools are supported by training campaigns across the sites.

Most of the network members also act as boundary spanners (Gittell and Weiss, 2004) in the sense that they have established connections to process technology groups or they are members of these groups as well. This helps the network establish strong links with other informal groups within the organization and act as conductor for a better flow of ideas between these groups and the network. Potentially, network members have a chance to influence core technology groups towards energy efficiency at product level.

On average, a 5-10% work-time allocation is approved for all network members to engage with the network functions. In case a member is not coping in terms of time management there is the option of sub-contracting the improvement project to an external subcontractor who is hired for that particular purpose and the subcontractor’s time allocation to the project can be up to 100%.

“….by having the network we meet and we select together a list of projects that we want to put forward to access that central pot of money. So we know roughly how much will be allocated to industrial energy efficiency and so we select projects across all of the sites that we think will get funded and we put them all together as a group…so rather than having lots of individual sites making individual requests for funding and being rejected, by going together as a group and having some kind of strategy as well…”

Each dot on each of the model rows represents the relative efficiencies that a factory achieves in saving energy and resources through best practice (5 of 11 factories represented here, each delivering an aircraft part towards final assembly). The assessment allowed this network of energy efficiency engineers and managers to better understand the strengths and weaknesses in different factories and where the learning opportunities exist (and against which dimension of the model).

2. The perception problem in manufacturing processes and management practice:

The following assessment is performed in a leading aerospace company where two senior engineering managers (green and orange lines) find it difficult to agree on the maturity of different practices currently used at the factory level as part of their environmental sustainability strategy.

This assessment was part of the following use case:

The self-assessment was completed by the head of environment and one of his associates in the same function. These two practitioners work closely together and are based in the UK headquarters. Even though the maturity profiles do not vary significantly (1 level plus or minus) it is clear that there is very little overall agreement on the maturity levels in each dimension.

3. Using the maturity model as a consensus building tool in a factory:

Seven practitioners from different parts of the business (engineering, operations, marketing, health and safety etc.) were brought together to understand how they think the factory performs. The convergence between perceptions was very small and this would indicate high levels of resistance to change and continuous improvement. For example, if senior managers think they are doing really well, they will not invest time and effort in better practices and technologies.

A timeline (today +5years) was used to understand where they think they are today and where they want to be tomorrow.

This can be one of the ways of thinking about improvements that need to occur, starting with areas of interest that are underperforming and developing the right projects to address the gaps.

References:

Lunt, M.F. et al. (2015) ‘Reconciling reported and unreported HFC emissions with Atmospheric Observations’, Proceedings of the National Academy of Sciences, 112(19), pp. 5927–5931.

Gittell, Jody & Weiss, Leigh. (2004). Coordination Networks Within and Across Organizations: A Multi-level Framework. Journal of Management Studies. 41. 127-153.

Appendix:

1. High resolution picture of the maturity model for printing (also available here: Litos, L. (2016). Design support for eco-efficiency improvements in manufacturing p. 218.)

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Author: Onyekachi Nwafor (CEO, KatexPower).

Topic: Waste management.

Tool type: Teaching.

Relevant disciplines: Environmental; Civil; Systems engineering.

Keywords: Sustainability; Environmental justice; Water and sanitation; Community engagement; Urban planning; Waste management; Nigeria; Sweden; AHEP; Higher education.

Sustainability competency: Systems thinking; Integrated problem-solving competency; Strategic competency.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37. 

Related SDGs: SDG 6 (Clean Water and Sanitation); SDG 11 (Sustainable Cities and Communities); SDG 13 (Climate Action).

Reimagined Degree Map Intervention: More real-world complexity; Active pedagogies and mindset development; Cross-disciplinarity.

Educational level: Beginner.

Learning and teaching notes:

This case study juxtaposes the waste management strategies of two cities: Stockholm, Sweden, renowned for its advanced recycling and waste-to-energy initiatives, and Lagos, Nigeria, a megacity grappling with rapid urbanisation and growing waste challenges. The contrast and comparison aim to illuminate the diverse complexities, unique solutions, and ethical considerations underlying their respective journeys towards sustainable waste management.

This case is presented in parts. If desired, a teacher can use Part one in isolation, but Parts two and three develop and complicate the concepts presented in Part one to provide for additional learning. The case study allows teachers the option to stop at multiple points for questions and/or activities, as desired.

Learners have the opportunity to:

Understand the role of UNSDGs in urban planning and waste management policy.

Analyse and apply diverse waste management strategies considering socio-economic and cultural contexts.
Advocate for inclusive, equitable, and environmentally conscious waste management solutions.

Teachers have the opportunity to:

Introduce concepts relating to circularity
Link real-world and systemic engineering problems with SDGs
Introduce aspects of social, environmental, and economic sustainability

Learning and teaching resources:

Websites:

Government publications:

Journal articles:

Part one:

You are a renowned environmental engineer and urban planner, specialising in sustainable waste management systems. The Commissioner of Environment for Lagos invites you to analyse the city’s waste challenges and develop a comprehensive, adaptable roadmap towards a sustainable waste management future. Your mandate involves:

Assessing the current state of waste generation, collection, and disposal in Lagos.
Evaluating the exemplar Stockholm’s waste management strategies and identifying transferable best practices.
Examining the socio-economic and cultural context of Lagos and its specific waste management needs.
Devising a holistic waste management framework that prioritises environmental sustainability, social equity, and community engagement.

Optional STOP for questions and activities:

Discussion: Compare and contrast Lagos’s current waste management with Stockholm’s system, considering factors like efficiency, technology, and environmental impact.
Activity: Map the various stakeholders involved in Lagos’s waste management system, identifying potential partners and challenges for collaboration.
Discussion: Explore the social and economic dimensions of waste management in Lagos. How does waste affect different communities and individuals?

Part two:

As you delve deeper, you recognise the multifaceted challenges Lagos faces. While Stockholm boasts advanced technologies and high recycling rates, its solutions may not directly translate to Lagos’s context. Limited infrastructure, informal waste sectors, and diverse cultural practices must be carefully considered. Your role evolves from simply analysing technicalities and policies to devising a holistic strategy. This strategy must not only champion environmental sustainability but also champion social equity, respecting the unique socio-economic and cultural nuances of each urban setting. You must design a system that:

Promotes waste reduction and source separation at the community level.
Empowers and integrates the informal waste sector through training and formalisation
Ensures access to safe and efficient waste collection for all, particularly underserved communities.
Leverages sustainable technologies and practices (e.g., composting, biogas) while remaining adaptable to resource constraints.

Optional STOP for questions and activities:

Analysing existing waste management policies
City: [Choose Stockholm or Lagos]
Existing policy: [Specify the specific policy you are analysing]

Adaptability for diverse contexts:

Can this policy be easily adapted to other cities with different socio-economic and cultural contexts?
What are the key challenges and opportunities for adaptation?
What resources and support would be needed for successful adaptation?
What technical knowledge and skills are required to enact the policy? What local industries and partners will be critical to success?

Discussion prompts:

To what extent does the existing policy prioritise environmental sustainability, social equity, and economic feasibility?
What role can communities and diverse stakeholders play in shaping and implementing waste management policies?

Part three:

While implementing your strategy, you encounter enthusiasm from some sectors but also resistance from others, particularly informal waste workers and industries whose livelihoods may be impacted. Balancing immediate socio-economic concerns with long-term environmental benefits becomes crucial.

Optional STOP for questions and activities:

Discussion: Explore the ethical considerations of implementing a sustainable waste management system that might have short-term negative impacts on certain groups. How do you balance long-term benefits with potential immediate drawbacks?
Activity: Investigate real-world examples of cities transitioning to sustainable waste management and the strategies they used to mitigate negative socio-economic impacts.

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Author: Onyekachi Nwafor (CEO, KatexPower).

Topic: Electrification of remote villages.

Tool type: Teaching.

Relevant disciplines: Energy; Electrical; Mechanical; Environmental.

Keywords: Sustainability; Social responsibility; Equality, Rural development; Environmental conservation; AHEP; Renewable energy; Electrification; Higher education; Interdisciplinary; Pedagogy.

Sustainability competency: Anticipatory; Strategic; Integrated problem-solving.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37. 

Related SDGs: SDG7 (Affordable and Clean Energy); SDG 10 (Reduced Inequalities); SDG 11 (Sustainable Cities and Communities).

Reimagined Degree Map Intervention: More real-world complexity; Active pedagogies and mindset development; Cross-disciplinarity.

Educational level: Intermediate.

Learning and teaching notes:

This case study offers learners an explorative journey through the multifaceted aspects of deploying off-grid renewable solutions, considering practical, ethical, and societal implications. It dwells on themes such as Engineering and Sustainable Development (emphasizing the role of engineering in driving sustainable initiatives) and Engineering Practice (exploring the application of engineering principles in real-world contexts).

The dilemma in this case is presented in six parts. If desired, a teacher can use Part one in isolation, but Parts two and three develop and complicate the concepts presented in Part one to provide for additional learning. The case study allows teachers the option to stop at multiple points for questions and/or activities, as desired.

Learners have the opportunity to:

Recognise the significance of the SDGs in engineering solutions;
Enhance their skills in applying sustainable engineering practices in real-world scenarios.
Delve into the complexities of implementing off-grid solutions.
Navigate through the ethical considerations of deploying technologies in remote, often vulnerable, communities.
Engage in critical thinking to balance technological, societal, and environmental aspects.

Teachers have the opportunity to:

Highlight the importance of SDGs in engineering.
Facilitate discussions on ethical implications in technology deployment.
Evaluate learners’ ability to devise sustainable and ethical engineering solutions.

Learning and teaching resources:

SDG 7: Affordable and Clean Energy – Understand the global emphasis on clean energy and its implications
African Development Bank: Off-Grid Revolution
The World Bank : Mini Grids in Africa
International Energy Agency : Energy Access Outlook: from Poverty to Prosperity
James P Dunlop; Photovoltaic systems; ISBN: 978-0826913081; American Technical Publishers. Photovoltaic Systems is a comprehensive guide to the design and installation of several types of residential and commercial PV systems.
DGS; Planning and installing photovoltaic systems: A guide for installers, architects and engineers; ISBN: 978-1849713436; Planning and installing series.

In accordance with a report from the International Energy Agency (IEA) and statistics provided by the World Bank, approximately 633 million individuals in Africa currently lack access to electricity. This stark reality has significant implications for the remote villages across the continent, where challenges related to energy access persistently impact various aspects of daily life and stall social and economic development. In response to this critical issue, the deployment of off-grid renewable solutions emerges as a promising and sustainable alternative. Such solutions have the potential to not only address the pressing energy gap but also to catalyse development in isolated regions.

Situated in one of Egypt’s most breathtaking desert landscapes, Siwa holds a position of immense natural heritage importance within Egypt and on a global scale. The region is home to highly endangered species, some of which have restricted distributions found only in Siwa Oasis. Classified as a remote area, a particular community in Siwa Oasis currently relies predominantly on diesel generators for its power needs, as it remains disconnected from the national grid. Moreover, extending the national grid to this location is deemed economically and environmentally impractical, given the long distances and rugged terrain.

Despite these challenges, Siwa Oasis possesses abundant renewable resources that can serve as the foundation for implementing a reliable, economical, and sustainable energy source. Recognising the environmental significance of the area, the Egyptian Environmental Affairs Agency (EEAA) declared Siwa Oasis as a protected area in 2002.

Part one: Household energy for Siwa Oasis

Imagine being an electrical engineer tasked with developing an off-grid, sustainable power solution for Siwa Oasis village. Your goal is to develop a solution that not only addresses the power needs but also is sustainable, ethical, and has a positive impact on the community. The following data may help in developing your solution.

Data on Household Energy for Siwa Oasis:

Activities:

Analyse typical household appliances and their power consumption (lighting, refrigeration, pressing Iron).
Simulate daily energy usage patterns using smart meter data.
Identify peak usage times and propose strategies for energy conservation (example LED bulbs, etc)
Calculate appliance power consumption and estimate electricity costs.
Discussion:

a. How does this situation relate to SDG 7, and why is it essential for sustainable development?

b. What are the primary and secondary challenges of implementing off-grid solutions in remote villages?

Part two: Power supply options

Electricity supply in Siwa Oasis is mainly depends on Diesel Generators, 4 MAN Diesel Generators of 21 MW which are going to be wasted in four years, 2 CAT Diesel Generators of 5.2 MW and 1 MAN Diesel Generator 4 MW for emergency. Compare and contrast various power supply options for the household (renewable vs. fossil fuel).

Renewable: Focus on solar PV systems, including hands-on activities like solar panel power output measurements and battery sizing calculations.
Fossil fuel: Briefly discuss diesel generators and their environmental impact.

The Siwa Oasis community is divided over the choice of power supply options for their households. On one hand, there is a group advocating for a complete shift to renewable energy, emphasising the environmental benefits and long-term sustainability of solar PV systems. On the other hand, there is a faction arguing to continue relying on the existing diesel generators, citing concerns about the reliability and initial costs associated with solar power. The community must decide which power supply option aligns with their values, priorities, and long-term goals for sustainability and energy independence. This decision will not only impact their day-to-day lives but also shape the future of energy use in Siwa Oasis.

Optional STOP for questions and activities:

Debate: Is it ethical to impose new technologies on communities, even if it’s for perceived improvement of living conditions?
Discussion: How can engineers ensure the sustainability (environmental and operational) of off-grid solutions in remote locations?
Activities: Students to design a basic solar PV system for the household, considering factors like energy demand, solar resource availability, and budget constraints.

Part three: Community mini-grid via harnessing the desert sun

Mini-grid systems (sometimes referred to as micro-grids) generally serve several buildings or entire communities. The abundant sunshine in Siwa community makes it ideal for solar photovoltaic (PV) systems and based on the load demand of the community, a solar PV mini grid solution will work perfectly.

Electrical components of a typical PV system can be classified into DC and AC.

DC components: The electrical connection of solar modules to the inverter constitutes the DC part of a PV installation. Its design requires particular care and reliable components, as there is a risk of significant accidents with high DC voltages and currents, especially due to electric arcs.

The key DC components are:

PV cables and connectors: PV modules are usually delivered with a junction box and pre-assembled cables with single-contact electrical connectors. They enable easy interconnection of individual modules in strings. Solar cables are made of copper or aluminum (more cost-efficient).
Combiner boxes: Here, incoming strings are connected in parallel, and the resulting current is channeled through an output terminal to the inverter. A combiner box usually contains all required protection devices, disconnectors, and measuring equipment for string monitoring.

AC components: The equipment installed on the AC side of the inverter depends on the size and voltage class of the grid connection (low-voltage (LV), medium-voltage (MV), or high-voltage (HV) grid). Utility-scale PV plants usually require the following equipment:

Transformers, to increase the inverter output voltage to the grid voltage level
AC cables, buried
Circuit breakers, switchgears, and protection devices, for large PV plants (MV/HV connection)
Electricity meters

Activities:

Research and discuss the safety precautions and regulations for working with DC systems.
Analyse the DC components of a typical PV system, including cables, connectors, and combiner boxes.
Calculate the voltage and current levels at different points in the DC circuit based on the system design.
Investigate the concept of power factor and its significance in grid stability and energy bills.
Analyse the power factor of common household appliances and discuss its impact on the mini-grid.
Propose strategies to improve the overall power factor of the mini-grid, such as using capacitors or choosing energy-efficient appliances.

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Authors: Diana Adela Martin (University College London), Suleman Audu and Jeremy Mantingh (Engineers Without Borders The Netherlands).

Topic: Circular business models.

Tool type: Teaching.

Relevant disciplines: Chemical; Biochemical; Manufacturing.

Keywords: Circular business models; Teaching or embedding sustainability; Plastic waste; Plastic pollution; Recycling or recycled materials; Responsible consumption; Teamwork; Interdisciplinary; AHEP; Higher education.

Sustainability competency: Integrated problem-solving; Collaboration; Systems thinking.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37. 

Related SDGs: SDG 4 (Quality education); SDG 11 (Sustainable cities and communities); SDG 12 (Responsible consumption and production); SDG 13 (Climate action); SDG 14 (Life below water).

Reimagined Degree Map Intervention: More real-world complexity, Active pedagogies and mindset development, Authentic assessment, Cross-disciplinarity.

Educational level: Intermediate.

Learning and teaching notes:  

This case study is focused on the role of engineers to address the problem of plastic waste in the context of sustainable operations and circular business solutions. It involves a team of engineers developing a start-up aiming to tackle plastic waste by converting it into infrastructure components (such as plastic bricks). As plastic waste is a global problem, the case can be customised by instructors when specifying the region in which it is set. The case incorporates several components, including stakeholder mapping, empirical surveys, risk assessment and policy-making. This case study is particularly suitable for interdisciplinary teamwork, with students from different disciplines bringing their specialised knowledge.

The case study asks students to research the data on how much plastic is produced and policies for the disposal of plastic, identify the regions most affected by plastic waste, develop a business plan for a circular business focused on transforming plastic waste into bricks and understand the risks of plastic production and waste as well as the risks of a business working with plastic waste. In this process, students gain an awareness of the societal context of plastic waste and the varying risks that different demographic categories are exposed to, as well as the role of engineers in contributing to the development of technologies for circular businesses. Students also get to apply their disciplinary knowledge to propose technical solutions to the problem of plastic waste.

The case is presented in parts. Part one addresses the broader context of plastic waste and could be used in isolation, but parts two and three further develop and add complexity to the engineering-specific elements of the topic.

Learners have the opportunity to: 

apply their ethical judgement to a case study focused on a circular technology;
understand the national and supranational policy context related to the production and disposal of plastic;
analyse engineering and societal risks related to the development of a novel technology;  
develop a business model for a circular technology dealing with plastic waste;
identify the key stakeholder groups in the development of a circular business model;
reflect on how risks may differ for different demographic groups and identify the stakeholder groups most vulnerable to the negative effects of plastic waste; 
develop an empirical survey to identify the risks that stakeholders affected by or working with plastic waste are exposed to;
develop a risk assessment to identify the risks involved in the manufacturing of plastic waste bricks;
provide recommendations for lowering the risks in the manufacturing of plastic bricks.

Teachers have the opportunity to include teaching content purporting to:

Physico-chemical properties of plastic waste;
Manufacturing processes of plastic products and plastic bricks;
Sustainable policies targeting plastic usage and reduction;
Climate justice;
Circular entrepreneurship;
Risk assessment tools such as HAZOP and their application in the chemical industry.

Recommended pre-reading:

Part one:

Part two:

Part one:

Plastic pollution is a major challenge. It is predicted that if current trends continue, by 2050 there will be 26 billion metric tons of plastic waste, and almost half of this is expected to be dumped in landfills and the environment (Guglielmi, 2017). As plastic waste grows at an increased speed, it kills millions of animals each year, contaminates fresh water sources and affects human health. Across the world, geographical regions are affected differently by plastic waste. In fact, developing countries are more affected by plastic waste than developed nations. Existing reports trace a link between poverty and plastic waste, making it a development problem. Africa, Asia and South America see immense quantities of plastic generated elsewhere being dumped on their territory. At the moment, there are several policies in place targeting the production and disposal of plastic. Several of the policies active in developed regions such as the EU do not allow the disposal of plastic waste inside their own territorial boundaries, but allow it on outside territories.

Optional STOP for activities and discussion

Conduct research to identify 5 national or international regulations or policies about the use and disposal of plastic.

Compare these policies by stating which is the issuing policy body, what is the aim and scope of the policy.

Reflect on the effectiveness of each policy and debate in class what are the most effective policies you identified.

Write a reflection piece based on a policy of your choice targeting the use or disposal of plastic. In this reflection, identify the benefits of the policy as well as potential limitations. You may consider how you would improve the policy.

Conduct research to identify how much plastic is produced and how much plastic waste is generated in your region. Identify which sectors are the biggest producers of waste. Conduct research on how much of this plastic waste is being exported and where is it exported.

Identify the countries and companies with the biggest plastic footprint. Discuss in the classroom what you consider to contribute to these rankings.

Research global waste trading and identify the countries that are the biggest exporters and importers of plastic waste. Discuss the findings in classroom and what you consider to contribute to these rankings. Discuss whether there are or should be any restrictions governing global waste trade.

Write a report analysing the plastic footprint of a country or company of your choice. Include recommendations for minimising the plastic footprint.

Watch in class the documentary Plastic earth or A plastic ocean and discuss in class your key take-aways.

Part two:

Impressed by the magnitude of the problem of plastic waste faced today, together with a group of friends you met while studying engineering at the Technological University of the Future, you want to set up a green circular business. Circular business models aim to use and reuse materials for as long as possible, all while minimising waste. Your concern is to develop a sustainable technological solution to the problem of plastic waste. The vision for a circular economy for plastic rests on six key points (Ellen McArthur Foundation, n.d.):

Elimination of problematic or unnecessary plastic packaging through redesign, innovation, and new delivery models is a priority
Reuse models are applied where relevant, reducing the need for single-use packaging
All plastic packaging is 100% reusable, recyclable, or compostable
All plastic packaging is reused, recycled, or composted in practice
The use of plastic is fully decoupled from the consumption of finite resources
All plastic packaging is free of hazardous chemicals, and the health, safety, and rights of all people involved are respected

Optional STOP for group activities and discussion

Read about the example of the Great Plastic Bake Off and their project focused on converting plastic waste into plastic bricks. Research the chemical properties of plastic bricks and the process for the manufacturing process. Present your findings on a poster or discuss it in class.

Develop a concept map with ideas for potential sustainable technologies for reducing or recycling plastic waste. You may use as inspiration the Circular Strategies Scanner (available here).

Select one idea that you want to propose as the focus of your sustainable start-up. Give a name to your startup!

Describe the technology you want to produce: what is its aim? What problem can it solve or what gap can it address? What are the envisioned benefits of your technology? What are its key features?

Map the key stakeholders of the technology, by identifying the decision-makers for this technology, the beneficiaries of the technology, as well as those who are exposed to the risks of the technology

Analyse the market for your technology: are there businesses with a similar aim or similar technology? What differentiates your business or technology from them?

Identify key policies relevant to your technology: are there any policies or regulations in place that you should consider? In your geographical area, are there any policy incentives for sustainable technologies or businesses similar to the one you are developing?

For your start-up, assign different roles to the members of your group (such as technology officer, researcher, financial officer, communication manager, partnership director a.s.o) and describe the key tasks of each member. Identify how much personnel you would need

Identify the cost components and calculate the yearly costs for running your business (including personnel).

Perform a SWOT analysis of the Strengths, Weaknesses, Opportunities and Threats for your business. You may use this matrix to brainstorm each component.

Part three:

The start-up SuperRecycling aims to develop infrastructure solutions by converting plastic waste into bricks. Your team of engineers is tasked to develop a risk assessment for the operations of the factory in which this process will take place. The start-up is set in a developing country of your choice that is greatly affected by plastic waste.

Optional STOP for group activities and discussion

Agree on the geographical location of the startup SuperRecycling and identify the amount of plastic waste that your region has to cope with, as well as any other relevant socio-economic characteristics of the region.

Identify the demographic categories that are most exposed to the risks of plastic waste in the region.

Research and analyse the situation of the informal plastic waste picking sector in the region: who is picking up the waste? How much do they earn for working with waste? Is this a regular form of income and who pays this income? What does it mean to be an “informal” worker? Are there any key insights about the characteristics of the plastic waste workers that you find interesting?

Based on research and your own reflections, write a report on the role and risks that the plastic waste pickers are exposed to in their work.

Create an empirical survey with the aim of identifying the risks the plastic waste pickers are exposed to, as well as the strategies they take to mitigate risks or deal with accidents.

Create an empirical survey with the aim of identifying the risks that the factory workers at SuperRecycling are exposed to, as well as the strategies they take to mitigate risks or deal with accidents.

Research the manufacturing process for developing plastic bricks and analyse the technical characteristics of plastic bricks, based on existing tests.

With the classroom split into 2 groups, argue in favour or against their use of plastic bricks in construction. One group develops 5 arguments for the use of plastic bricks in construction, while the other group develops 5 arguments against the use of plastic bricks in construction. At the end, the groups disperse and students vote individually via an anonymous online poll whether they are personally in favour or against the use of plastic bricks in construction.

Create a HAZOP risk assessment for the manufacturing processes of the factory where plastic waste is converted into plastic bricks.

Develop an educational leaflet for preventing the key injuries and hazards in the process of converting plastic waste into bricks, both for the informal waste pickers and the factory workers.

Acknowledgement: The authors want to acknowledge the work of Engineers Without Borders Netherlands and its partners to tackle the problem of plastic waste. The case is based on the Challenge Based Learning exploratory course Decision Under Risk and Uncertainty designed by Diana Adela Martin at TU Eindhoven, where students got to work on a real-life project about the conversion of plastic waste into bricks to build a washroom facility in a school in Ghana, based on the activity of Engineers Without Borders Netherlands. The project was spearheaded by Suleman Audu and Jeremy Mantingh.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

To view a plain text version of this resource, click here to download the PDF.

Author: Dr. Jemma L. Rowlandson (University of Bristol).

Topic: Achieving carbon-neutral aviation by 2050.

Tool type: Teaching.

Relevant disciplines: Chemical; Aerospace; Mechanical; Environmental; Energy.

Keywords: Design and innovation; Conflicts of interest; Ethics; Regulatory compliance; Stakeholder engagement; Environmental impact; AHEP; Sustainability; Higher education; Pedagogy; Assessment.

Sustainability competency: Systems thinking; Anticipatory; Critical thinking; Integrated problem-solving; Strategic; Collaboration.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37.

Related SDGs: SDG 7 (Affordable and Clean Energy); SDG 9 (Industry, Innovation and Infrastructure); SDG 12 (Responsible Consumption and Production); SDG 13 (Climate Action).

Reimagined Degree Map Intervention: More real-world complexity; Active pedagogies and mindset development; Authentic assessment.

Educational aim: Apply interdisciplinary engineering knowledge to a real-world sustainability challenge in aviation, foster ethical reasoning and decision-making with regards to environmental impact, and develop abilities to collaborate and communicate with a diverse range of stakeholders.

Educational level: Intermediate.

Learning and teaching notes:

This case study provides students an opportunity to explore the role of hydrogen fuel in the aviation industry. Considerable investments have been made in researching and developing hydrogen as a potential clean and sustainable energy source, particularly for hydrogen-powered aircraft. Despite the potential for hydrogen to be a green and clean fuel there are lingering questions over the long-term sustainability of hydrogen and whether technological advancements can progress rapidly enough to significantly reduce global carbon dioxide emissions. The debate around this issue is rich with diverse perspectives and a variety of interests to consider. Through this case study, students will apply their engineering expertise to navigate this complex problem and examine the competing interests involved.

This case is presented in parts, each focusing on a different sustainability issue, and with most parts incorporating technical content. Parts may be used in isolation, or may be used to build up the complexity of the case throughout a series of lessons.

Learners have the opportunity to:

Understand the principles of hydrogen production, storage, and emissions in the context of aviation.
Assess the environmental, economic, and social impacts of adopting hydrogen technology in the aviation industry.
Develop skills in making estimates and assumptions in real-world engineering scenarios.
Explore the ethical dimensions of engineering decisions, particularly concerning sustainability and resource management.
Examine the influence of policy and stakeholder perspectives on the adoption of green hydrogen within the aviation industry.

Teachers have the opportunity to:

Integrate concepts related to renewable energy sources, with a focus on hydrogen.
Discuss the engineering challenges and solutions in storing and utilising hydrogen in aviation.
Foster critical thinking about the balance between technological innovation, environmental sustainability, and societal impact.
Guide students in understanding the role of policy in shaping technological advancements and environmental strategies.
Assess students’ ability to apply engineering principles to solve complex, open-ended, real-world problems.

Supporting resources:

Learning and teaching resources:

Hydrogen fundamentals resources:

Case Study Workbook – designed for this study to give a broad overview of hydrogen, based primarily on the content below from US DoE.
US DoE – College of the Desert and Sunlight Transport – Hydrogen basics are covered in Module 1, 2 and 3.
Hydrogen Aware – Set of modules for a more comprehensive background to hydrogen with a UK-specific context.

We recommend encouraging the use of sources from a variety of stakeholders. Encourage students to find their own, but some examples are included below:

FlyZero Open Source Reports Archive: A variety of technical reports focused on hydrogen in aviation specifically including concept aircraft, potential life cycle emissions, storage, and usage.
Hydrogen in Aviation Alliance: Press release (September 2023) announcing an agreement amongst some of the major players in aviation to focus on hydrogen.
Lee et al. (2018) The contribution of global aviation to anthropogenic climate forcing for 2000 to 2018: Open manuscript available. This seminal paper examines the contribution of global aviation to anthropogenic climate change.
Safe Landing: A group of aviation workers campaigning for long-term employment. Projected airline growth is not compatible with net zero goals and the current technology is not ready for decarbonisation, action is drastically needed now to safeguard the aviation industry and prevent dangerous levels of warming.
UK Government Hydrogen Strategy: Sets out the UK government view of how to develop a low carbon hydrogen sector including aviation projects including considerations of how to create a market.

Pre-Session Work:

Students should be provided with an overview of the properties of hydrogen gas and the principles underlying the hydrogen economy: production, storage and transmission, and application. There are several free and available sources for this purpose (refer to the Hydrogen Fundamentals Resources above).

Introduction

“At Airbus, we believe hydrogen is one of the most promising decarbonisation technologies for aviation. This is why we consider hydrogen to be an important technology pathway to achieve our ambition of bringing a low-carbon commercial aircraft to market by 2035.” – Airbus, 2024

As indicated in the industry quote above, hydrogen is a growing area of research interest for aviation companies to decarbonise their fleet. In this case study, you are put in the role of working as an engineering consultant and your customer is a multinational aerospace corporation. They are keen to meet their government issued targets of reducing carbon emissions to reach net zero by 2050 and your consultancy team has been tasked with assessing the feasibility of powering a zero-emission aircraft using hydrogen. The key areas your customer is interested in are:

The feasibility of using green hydrogen as a fuel for zero-emission aviation;
The feasibility of storing hydrogen in a confined space like an aircraft;
Conducting a stakeholder analysis on the environmental impact of using hydrogen for aviation.

Part one: The aviation landscape

Air travel connects the world, enabling affordable and reliable mass transportation between continents. Despite massive advances in technology and infrastructure to produce more efficient aircraft and reduce passenger fuel consumption, carbon emissions have doubled since 2019 and are equivalent to 2.5 % of global CO2 emissions.

Activity: Discuss what renewable energy sources are you aware of that could be used for zero-emission aviation?

Your customer is interested in the feasibility of hydrogen for aviation fuel. However, there is a debate within the management team over the sustainability of hydrogen. As the lead engineering consultant, you must guide your customer in making an ethical and sustainable decision.

Hydrogen is a potential energy carrier which has a high energy content, making it a promising fuel for aviation. Green hydrogen is produced from water and is therefore potentially very clean. However, globally most hydrogen is currently made from fossil fuels with an associated carbon footprint. Naturally occurring as a gas, the low volumetric density makes it difficult to transport and add complications with storage and transportation.

Activity: From your understanding of hydrogen, what properties make it a promising fuel for aircraft? And what properties make it challenging?

Optional activity: Recap the key properties of hydrogen – particularly the low gas density and low boiling point which affect storage.

Part two: Hydrogen production

Hydrogen is naturally abundant but is often found combined with other elements in various forms such as hydrocarbons like methane (CH4) and water (H2O). Methods have been developed to extract hydrogen from these compounds. It is important to remember that hydrogen is an energy carrier and not an energy source; it must be generated from other primary energy sources (such as wind and solar) converting and storing energy in the form of hydrogen.

Research: What production methods of hydrogen are you aware of? Where does most of the world’s hydrogen come from currently?

The ideal scenario is to produce green hydrogen via electrolysis where water (H2O) is split using electricity into hydrogen (H2) and oxygen (O2). This makes green hydrogen potentially completely green and clean if the process uses electricity from renewable sources. The overall chemical reaction is shown below:

However, the use of water—a critical resource—as a feedstock for green hydrogen, especially in aviation, raises significant ethical concerns. Your customer’s management team is divided on the potential impact of this practice on global water scarcity, which has been exacerbated by climate change. You have been tasked with assessing the feasibility of using green hydrogen in aviation for your client. Your customer has chosen their London to New York route (3,500 nmi), one of their most popular, as a test-case.

Activity: Estimate how much water a hydrogen plane would require for a journey of 5000 nmi (London to New York). Can you validate your findings with any external sources? Hint: How much water does it take to produce 1 kg of green hydrogen? Consider the chemical equation above.

Activity: Consider scaling this up and estimate how much water the entire UK aviation fleet would require in one year. Compare your value to the annual UK water consumption, would it be feasible to use this amount of water for aviation?

Discussion: From your calculations and findings so far, discuss the practicality of using water for aviation fuel. Consider both the obstacles and opportunities involved in integrating green hydrogen in aviation and the specific challenges the aviation industry might face.

Despite its potential for green production, globally the majority of hydrogen is currently produced from fossil fuels – termed grey hydrogen. One of your team members has proposed using grey hydrogen as an interim solution to bridge the transition to green hydrogen, in order for the company to start developing the required hydrogen-related infrastructure at airports. They argue that carbon capture and storage technology could be used to reduce carbon emissions from grey hydrogen while still achieving the goal of decarbonisation. Hydrogen from fossil fuels with an additional carbon capture step is known as blue hydrogen.

However, this suggestion has sparked a heated debate within the management team. While acknowledging the potential to address the immediate concerns of generating enough hydrogen to establish the necessary infrastructure and procedures, many team members argued that it would be a contradictory approach. They highlighted the inherent contradiction of utilising fossil fuels, the primary driver of climate change, to achieve decarbonisation. They emphasised the importance of remaining consistent with the ultimate goal of transitioning away from fossil fuels altogether and reducing overall carbon emissions. Your expertise is now sought to weigh these options and advise the board on the best course of action.

Optional activity: Research the argument for and against using grey or blue hydrogen as an initial step in developing hydrogen infrastructure and procedures, as a means to eventually transition to green hydrogen. Contrast this with the strategy of directly implementing green hydrogen from the beginning. Split students into groups to address both sides of this debate.

Discussion: Deliberate on the merits and drawbacks of using grey or blue hydrogen to catalyse development of hydrogen aviation infrastructure. What would you recommend—prioritising green hydrogen development or starting with grey or blue hydrogen as a transitional step? How will you depict or visualise your recommendation to your client?

Part three: Hydrogen storage

Despite an impressive gravimetric energy density (the energy stored per unit mass of fuel) hydrogen has the lowest gas density and the second-lowest boiling point of all known chemical fuels. These unique properties pose challenges for storage and transportation, particularly in the constrained spaces of an aircraft.

Activity: Familiarise yourself with hydrogen storage methods. What hydrogen storage methods are you aware of? Thinking about an aviation context what would their advantages and disadvantages be?

As the lead engineering consultant, you have been tasked with providing expert advice on viable hydrogen storage options for aviation. Your customer has again chosen their London to New York route (3,500 nmi) as a test-case because it is one of their most popular, transatlantic routes. They want to know if hydrogen storage can be effectively managed for this route as it could set a precedent for wider adoption for their other long-haul flights. The plane journey from London to New York is estimated to require around 15,000 kg of hydrogen (or use the quantity estimated previously estimated in Part 2 – see Appendix for example).

Activity: Estimate the volume required to store the 15,000 kg of hydrogen as a compressed gas and as a liquid.

Discussion: How feasible are compressed gas and liquid hydrogen storage solutions? The space taken up by the fuel is one consideration but what other aspects are important to consider? How does this compare to the current storage solution for planes which use conventional jet fuel. Examples of topics to consider are: materials required for storage tanks, energy required to liquify or compress the hydrogen, practicality of hydrogen storage and transport to airports, location and distance between hydrogen generation and storage facilities, considerations of fuel leakage. When discussing encourage students to compare to the current state of the art, which is jet fuel.

Part four: Emissions and environmental impact

In Part four, we delve deeper into the environmental implications of using hydrogen as a fuel in aviation with a focus on emissions and their impacts across the lifecycle of a hydrogen plane. Aircraft can be powered using either direct combustion of hydrogen in gas turbines or by reacting hydrogen in a fuel cell to produce electricity that drives a propeller. As the lead engineering consultant, your customer has asked you to choose between hydrogen combustion in gas turbines or the reaction of hydrogen in fuel cells. The management team is divided on the environmental impacts of both methods, with some emphasising the technological readiness and efficiency of combustion and others advocating for the cleaner process of fuel cell reaction.

Activity: Research the main emissions associated with combustion of hydrogen and electrochemical reaction of hydrogen in fuel cells. Compare to the emissions associated with combustion of standard jet fuel. Students should consider not only CO2 emissions but also other pollutants such as NOx, SOx, and particulate matter.

Discussion: What are the implications of these emissions on air quality and climate change. Discuss the trade-offs between the different methods of utilising hydrogen in terms of the environmental impact. Compare to the current standard of jet fuel combustion.

Both combustion of hydrogen in an engine and reaction of hydrogen in a fuel cell will produce water as a by-product. The management team are concerned over the effect of using hydrogen on the formation of contrails. Contrails are clouds of water vapour produced by aircraft that have a potential contribution to global warming but the extent of their impact is uncertain.

Activity: Investigate how combustion (of both jet fuel and hydrogen) and fuel cell reactions contribute to contrail formation. What is the potential climactic effect of contrails?
Optional extension: How can manufacturers and airlines act to reduce water emissions and contrail formation – both for standard combustion of jet fuel and future hydrogen solutions?
Discussion: Based on your findings, which hydrogen propulsion technology would you recommend to the management team?

So far we have considered each aspect of the hydrogen debate in isolation. However, it is important to consider the overall environmental impact of these stages as a whole. Choices made at each stage of the hydrogen cycle – generation, storage, usage – will collectively impact the overall environmental impact and sustainability of using hydrogen as an aviation fuel and demonstrates how interconnected our decisions can be.

Activity: Assign students to groups based on the stage of a hydrogen lifecycle (generation, storage/transport, usage). Each group could research and discuss the potential emissions and environmental impacts associated with their assigned stage. Consider both direct and indirect emissions, like energy used in production processes or emissions related to infrastructure development. Principles such as life cycle assessment can be incorporated for a holistic view of hydrogen emissions.

Activity: After the individual group discussions, each group could present their findings and perspectives on their stage of the lifecycle. The whole class could then reflect on the overall environmental impacts of hydrogen in aviation. How do these impacts compare across different stages of the lifecycle? What are the trade-offs involved in choosing different types of hydrogen (green, blue, grey) and storage/transportation solutions?

Discussion: Conclude with a reflective discussion. Students bring together their findings on the life cycle stages of hydrogen and present their overall perspectives on the environmental sustainability of using hydrogen in aviation.

Part five: Hydrogen aviation stakeholders

Hydrogen aviation is an area with multiple stakeholders with conflicting priorities. Understanding the perspectives of these key players is important when considering the feasibility of hydrogen in the aviation sector.

Activity: Who are the key players in this scenario? What are their positions and perspectives? How can you use these perspectives to understand the complexities of the situation more fully?

Your consultancy firm is hosting a debate for the aviation industry in order to help them make a decision around hydrogen-based technologies. You have invited representatives from consumer groups, the UK government, Environmental NGOs, airlines, and aircraft manufacturers.

Activity: Take on the role of these key stakeholders, ensuring you understand their perspective and priorities. This could form part of a separate research exercise, or students can use the key points given below. Debate whether or not hydrogen fuel should be used to help the aviation sector reach net zero.

Stakeholder	Key priorities and considerations
Airline & Aerospace Manufacturer	Cost efficiency (fuel, labour, fleet maintenance) – recovering from pandemic. Passenger experience (commercial & freight). Develop & maintain global supply chains. Safety, compliance and operational reliability. Financial responsibility to employees and investors. Need government assurances before making big capital investments.
UK Government	Achieve net zero targets by 2050 Promote economic growth and job creation (still recovering from pandemic). Fund research and innovation to put their country’s technology ahead. Fund renewable infrastructure to encourage industry investment.
Environmental NGOs	Long-term employment for aviation sector. Demand a sustainable future for aviation to ensure this – right now, not in 50 years. Standards and targets for industry and government and accountability if not met. Some NGOs support drastic cuts to flying. Want to raise public awareness over sustainability of flying.
Consumer	Environmentally aware (understand the need to reduce carbon emissions). Also benefit greatly from flying (tourism, commercial shipping, etc.). Safety and reliability of aircraft & processes. Cost effectiveness – want affordable service

Appendix: Example calculations

There are multiple methods for approaching these calculations. The steps shown below are just one example for illustrative purposes.

Part two: Hydrogen production

Challenge: Estimate the volume of water required for a hydrogen-powered aircraft.

Assumptions around the hydrogen production process, aircraft, and fuel requirement can be given to students or researched as a separate task. In this example we assume:

All hydrogen is generated via electrolysis of fresh water with an efficiency of 100%.
A mid-size aircraft required with ~300 passenger capacity and flight range of ~3500 nmi (London to New York).
Flight energy requirement for a kerosene-fuelled jet is the same as a hydrogen-fuelled jet.

Example estimation:

1. Estimate the energy requirement for a mid-size jet

No current hydrogen-fuelled aircraft exists, so we can use a kerosene-fuelled analogue. Existing aircraft that meet the requirements include the Boeing 767 or 747. The energy requirement is then:

2. Estimate the hydrogen requirement

Assuming a hydrogen plane has the same fuel requirement:

3. Estimate the volume of water required

Assuming all hydrogen is produced from the electrolysis of water:

Electrolysis reaction:

For this reaction, we know one mole of water produces one mole of hydrogen. We need to calculate the moles for 20,000 kg of hydrogen:

With a 1:1 molar ratio, we can then calculate the mass of water:

This assumes an electrolyser efficiency of 100%. Typical efficiency values are under 80%, which would yield:

Challenge: Is it feasible to power the UK aviation fleet with water?

The total energy requirement for UK aviation can be given to students or set as a research task.

Estimation can follow a similar procedure to the above.

Multiple methods for validating and assessing the feasibility of this quantity of water. For example, the UK daily water consumption is 14 billion litres. The water requirement estimated above is < 1 % of this total daily water consumption, a finding supported by FlyZero.

Part three: Hydrogen storage

Challenge: Is it feasible to store 20,000 kg of hydrogen in an aircraft?

There are multiple methods of determining the feasibility of storage volume. As example is given below.

1. Determining the storage volume

The storage volume is dependent on the storage method used. Density values associated with different storage techniques can be research or given to students (included in Table 2). The storage volume required can be calculated from the mass of hydrogen and density of storage method, example in Table 2.

Table 2: Energy densities of various hydrogen storage methods

2. Determining available aircraft volume

A straightforward method is to compare the available volume on an aircraft with the hydrogen storage volume required. Aircraft volumes can be given or researched by students. Examples:

This assumes hydrogen tanks are integrated into an existing aircraft design. Liquid hydrogen can feasibly fit into an existing design, though actual volume will be larger due to space/constraint requirements and additional infrastructure (pipes, fittings, etc) for the tanks. Tank size can be compared to conventional kerosene tanks and a discussion encouraged over where in the plane hydrogen tanks would need to be (conventional liquid fuel storage is in the wings of aircraft, this is not possible for liquid storage tanks due to their shape and infrastructure storage is inside the fuselage). Another straightforward method for storage feasibility is modelling the hydrogen volume as a simple cylinder and comparing to the dimensions of a suitable aircraft.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Author: Dr Irene Josa (UCL)

Topic: Embodied carbon in the built environment.

Type: Teaching.

Relevant disciplines: Civil engineering; Environmental engineering; Construction management.

Keywords: Embodied carbon; Resilient construction practices; Climate change adaptation; Ethics; Teaching or embedding sustainability; AHEP; Higher education; Pedagogy; Environmental impact assessment; Environmental risk; Assessment.

Sustainability competency: Integrated problem-solving; Systems thinking; Critical thinking; Collaboration; Anticipatory.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37. 

Related SDGs: SDG 4 (Quality education); SDG 9 (Industry, innovation and infrastructure); SDG 11 (Sustainable cities and communities); SDG 13 (Climate action).

Reimagined Degree Map Intervention: More real-world complexity; Active pedagogies and mindset development; Authentic assessment; Cross-disciplinarity.

Educational aim: To foster a deep understanding of the challenges and opportunities in balancing environmental sustainability and profitability/safety in construction projects. To develop critical thinking and decision-making skills in addressing social, economic, and environmental considerations. To encourage students to propose innovative and comprehensive solutions for sustainable urban development.

Educational level: Intermediate.

Learning and teaching notes:

Before engaging with the case study, learners should be familiar with the process of calculating embodied carbon and conducting a cost-benefit analysis. The case study is presented in three parts. In Part one, an ambitious urban revitalisation project is under development, and a project manager needs to find a balance between financial considerations and the urgent need for sustainable, low-embodied carbon construction. In Part two, the project being developed is located in a coastal area prone to climate change-related disasters. The team needs to ensure that the project is durable in the face of disasters and, at the same time, upholds sustainability principles. Lastly, in Part three, stakeholders involved in the two previous projects come together to identify potential synergies.

Learners have the opportunity to:

Assess the ethical dimensions of construction scenarios, particularly the trade-offs between socio-economic constraints and environmentally-friendly practices.
Identify potential conflicts between environmental advocacy and financial considerations, fostering critical thinking in real-world construction project dilemmas.
Gain hands-on experience in researching and calculating the embodied carbon of different construction options, enhancing their understanding of sustainability metrics.
Conduct cost-benefit analyses for various construction methods, providing insights into the financial implications of sustainable practices.
Engage in discussions and debates on challenges in reducing embodied carbon, balancing sustainability with profitability, and convincing stakeholders of long-term benefits.

Teachers have the opportunity to:

Equip students with strategies to navigate tensions between sustainability goals and socio-economic constraints.
Integrate technical content on sustainable construction methods.
Integrate engineering content with business and entrepreneurial leadership, fostering interdisciplinary learning and preparing students for real-world challenges.
Informally evaluate students’ critical thinking and communication skills through discussions, activities, and presentations related to sustainable construction practices.

Supporting resources:

Learning and teaching resources:

Environmental impact assessment:

Hammond, G., et al. (2011). Embodied carbon: the inventory of carbon and energy.
Hauschild, M. Z., et al. (2018). Life cycle assessment.
IStructE (2022). How to calculate embodied carbon (Second edition).

Social impact assessment:

Alomoto, W. et al. (2021). Social impact assessment: a systematic review of literature.
Benoît Norris, C., et al. (2020). Guidelines for social life cycle assessment of products and organizations.
Chevrier, B., et al.(2010). The guidelines for social life cycle assessment of products: just in time!’

Economic impact assessment:

Korpi, E., & Ala‐Risku, T. (2008). Life cycle costing: a review of published case studies.
Mishan, E. J., & Quah, E. (2020). Cost-benefit analysis.
Woodward, D. G. (1997). Life cycle costing—Theory, information acquisition and application.

Systems thinking and holistic analysis approaches (PESTLE, SWOT):

Anderson, V., & Johnson, L. (1997). Systems thinking basics .
Checkland, P. (1999). Systems thinking.
Coman, A., & Ronen, B. (2009). Focused SWOT: diagnosing critical strengths and weaknesses.
Christodoulou, A., & Cullinane, K. (2019). Identifying the main opportunities and challenges from the implementation of a port energy management system: A SWOT/PESTLE analysis. 
Helms, M. M., & Nixon, J. (2010). Exploring SWOT analysis–where are we now? A review of academic research from the last decade. 
Perera, R. (2017). The PESTLE analysis.
Rastogi, N. I. T. A. N. K., & Trivedi, M. K. (2016). PESTLE technique–a tool to identify external risks in construction projects.

Real-world cases to explore:

Related to Part one: Hudson Yards (New York City), King Abdullah Economic City (Saudi Arabia), Masdar City (United Arab Emirates).
Related to Part two: Bangladesh Delta Resilience Project, Majuro Atoll Relocation Project, New Orleans Post-Katrina Redevelopment, Kivalina Relocation Project, Vietnamese Red River Delta Resilient Cities Project.
Related to Part three: Amsterdam Circular Centre, Seoul Forest.

Part one:

In the heart of an urban revitalisation project, the company CityScape Builders is embarking on a transformational journey to convert a neglected area into a vibrant urban centre which will be named ReviveRise District. This urban centre will mostly be formed by tall buildings.

Avery, the project manager at CityScape Builders, is under immense pressure to meet tight budget constraints and deadlines. Avery understands the project’s economic implications and the importance of delivering within the stipulated financial limits. However, the conflict arises when Rohan, a renowned environmental advocate and consultant, insists on prioritising sustainable construction practices to reduce the project’s embodied carbon. Rohan envisions a future where construction doesn’t come at the cost of the environment.

On the other side of the situation is Yuki, the CFO of CityScape Builders, who is concerned about the project’s bottom line. Yuki is wary of any actions that could escalate costs and understands that using low-embodied carbon materials often comes with a higher price tag.

In light of this situation, Avery proposes exploring different options of construction methods and materials that could be used in the design of their skyscrapers. Avery needs to do this quickly to avoid any delay, and therefore consider just the most important carbon-emitting aspects of the different options.

Optional STOP for questions and activities

Activity: research and calculate the embodied carbon of three different options that could be used to build one of the buildings at ReviveRise District. Make sure to consider all key aspects involved (e.g., project’s location, possible materials, etc.). Students can be encouraged to challenge the need to build skyscrapers.

Activity: conduct a cost-benefit analysis for the different options. What are the potential financial gains and losses? Students may want to consider the gains and losses from the perspectives of different stakeholders, such as engineers (e.g., construction programme savings) or quantity surveyors/cost consultants (e.g., security of supply material, insurance premiums).

Discussion: what are the key challenges in reducing embodied carbon in a construction project?

Discussion: how can the construction industry minimise activities that cause conflict between profitability and sustainability, and maximise activities that mutually-benefit sustainability and profitability?

Discussion: what are some strategies for convincing stakeholders of the long-term benefits of sustainable practices? In class, this can be done in different ways (e.g., class debate, elevator pitches).

Part two:

CityScape Builders is now embarking on a new challenge, ResilientCoast, a construction project located in a coastal area that is susceptible to climate change-related disasters. This region is economically disadvantaged and lacks the financial resources often found in more developed areas.

Micha, the resilience project manager at CityScape Builders, is tasked with ensuring the project’s durability in the face of disasters and the impacts of climate change. Micha’s primary concern is to create a resilient structure that can withstand extreme weather events but is equally dedicated to sustainability goals. To navigate this complex situation, Micha seeks guidance from Dr. Ravi, a climate scientist with expertise in coastal resiliency. Dr. Ravi is committed to finding innovative and sustainable solutions that simultaneously address the climate change impacts and reduce embodied carbon in construction.

In this scenario, Bao, the local community leader, also plays a crucial role. Bao advocates for jobs and economic development in the area, even though Bao is acutely aware of the inherent safety risks. Bao, too, understands that balancing these conflicting interests is a substantial challenge.

In this situation, Micha wonders how to construct safely in a vulnerable location while maintaining sustainability goals.

Optional STOP for questions and activities

Activity: investigate sustainable construction practices that enhance resilience. Create a list of methods and materials designed to withstand climate challenges,and evaluate their effectiveness to date.

Discussion: how can the construction industry minimise activities that cause conflict between safety and sustainability, and maximise activities that mutually-benefit sustainability and safety?

Discussion: what are the ethical considerations when constructing in areas prone to natural disasters and resource scarcity?

Discussion: what are some innovative solutions to promote safety and sustainability in construction projects in challenging environments, and what is their effectiveness in this situation?

Part three:

Robin and Samir are two independent sustainability consultants that are supporting the projects in ReviveRise District and ResilientCoast respectively. They are concerned that sustainability is just being assessed by embodied carbon and cost sustainability, and they believe that sustainability is a much broader concept than just those two indicators. Robin is the independent environmental consultant working with ReviveRise District officials and is responsible for assessing the broader environmental impacts of the construction project. Robin’s analysis spans beyond embodied carbon, considering local job creation, transportation effects, pollution, biodiversity, and other aspects of the project.

Samir, on the other hand, is a municipal board member of ResilientCoast. Samir’s role involves advocating for the local community while striving to ensure that sustainability efforts do not compromise the safety and resilience of the area. Samir’s responsibilities are more comprehensive than just economic considerations; they encompass the entire well-being of the community in the face of climate change.

Robin and Samir recognise the need for cross-city collaboration and information sharing, and they want to collaborate to ensure that the sustainability efforts of both projects do not create unintended burdens for their communities. They acknowledge that a comprehensive approach is necessary for analysing broader impacts, and to ensure both the success of the construction projects and the greater good of both communities. They believe in working collectively to find solutions that are not only sustainable but also beneficial to all stakeholders involved.

Optional STOP for questions and activities

Activity: work in pairs or small groups to analyse the holistic impacts of a construction project in their local area. Consider environmental, social, and economic factors and propose potential solutions. This can be supported by PESTLE and SWOT analysis, systems diagrams, or similar techniques.

Activity: envision a scenario where two cities, like in the case study, collaborate on a large construction project. Outline the key challenges, benefits, and potential strategies for success.

Discussion: how can different stakeholders work together to mitigate unintended burdens in construction projects?

Discussion: what are some effective strategies for cross-city collaboration on sustainability initiatives?

Discussion: how can construction projects contribute positively to their local communities while addressing environmental concerns?

The above questions and activities call for the involvement of cross-disciplinary teams, requiring expertise not only in engineering but also in planning, policy, and related fields. Ideally, in the classroom setting, students with diverse knowledge across these disciplines can be grouped together to enhance collaboration and address the tasks proposed. In cases where forming such groups is not feasible, the educator can assign specific roles such as engineer, planner, policymaker, etc., to individual students, ensuring a balanced representation of skills and perspectives.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Author: Ema Muk-Pavic, FRINA SHEA (University College London)

Topic: Links between sustainability and EDI

Tool type: Guidance.

Relevant disciplines: Any.

Keywords: Sustainability; AHEP; Programmes; Higher education; EDI; Economic Growth; Inclusive learning; Interdisciplinary; Global responsibility; Community engagement; Ethics; Future generations; Pedagogy; Healthcare; Health.

Sustainability competency: Self-awareness; Normative; Collaboration; Critical thinking.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37. 

Related SDGs: All 17.

Reimagined Degree Map Intervention: Active pedagogies and mindset development; More real-world complexity.

Who is this article for: This article should be read by educators at all levels in Higher Education who wish to understand how engineering practice can promote sustainable and ethical outcomes in equality, diversity, and inclusion.

Supporting resources:

Center for Responsible Business (CRB). (2023). Case study: Sustainability initiatives by a gemstone manufacturing organisation: community engagement, decent work and gender empowerment. New Delhi: Center for Responsible Business (CRB)

Montt-Blanchard, D., Najmi, S., & Spinillo, C. G. (2023). Considerations for Community Engagement in Design Education. The Journal of Design, Economics, and Innovation, 9(2), 234-263.

Phillips SP, G. K. (2022, Nov 5). Medical Devices, Invisible Women, Harmful Consequences. Int J Environ Res Public Health. 2022 Nov 5, 19(21).

Royal Academy of Engineering. (2018). Designing inclusion into engineering education. London: Royal Academy of Engineering.

Sultana F, e. a. (2023). Seaweed farming for food and nutritional security, climate change mitigation and adaptation, and women empowerment: A review. Aquaculture and Fisheries, 8(5), 463-480.

Premise:

The role of engineering is to enhance the safety, health and welfare of all, while protecting the planet and reversing existing environmental damage by deploying engineering solutions that can meet urgent global and local needs across all sectors (Engineering Council, 2021). The socioeconomic and environmental problems are strongly linked and finding responsible solutions is of imminent urgency that requires a holistic interdisciplinary perspective.

Sustainability and Equality, Diversity and Inclusion (EDI):

Equality, diversity, and Inclusion are interlinked concepts that emphasise equal opportunities, the inclusion of underrepresented groups, and the benefits that derive from diverse perspectives within the engineering field. Because sustainability is a global phenomenon, achieving the objective of “providing for all” should be a priority for all engineering professionals to ensure solutions are developed that benefit all (Jordan et al., 2021). To address sustainability challenges, engineers need to keep in mind that some communities are disproportionately impacted by climate change and environmental harm. It is essential to empower these communities to create systematic change and advocate for themselves.

A strategic pedagogical approach to sustainability and EDI:

A variety of pedagogical strategies can be applied to incorporate diversity and inclusion perspectives into sustainability engineering. Rather than adopting an “add-on” approach to the existing programmes it is recommended to fully embed inclusive and sustainable perspectives in the existing curriculum. These perspectives should be incorporated following a learning path of the students, from the beginning of the programme in the engineering fundamentals, starting with raising awareness and understanding of these perspectives and gradually improving student knowledge supported by evidence and further to implementing and innovating in engineering practice and solutions. By the end of the programme, diversity and inclusion and sustainability perspectives should be fully incorporated into the attitude of the graduates so that they will consider this when approaching any engineering task. This approach would go hand-in-hand with incorporating an ethics perspective.

Some practical examples of implementation in the programme and gradually deepening student learning are:

1. Awareness and understanding:

a. Define sustainability and its relation to EDI.

b. Engage with practical examples in modules that can be considered and discussed from EDI, ethical, and sustainability perspectives (e.g. present a product related to the subject of a class; in addition to discussing the product’s engineering characteristics, extend the discussion to sustainability and diverse stakeholders perspective – who are the end users, what is the affordability, where does the raw material comes from, how could it be recycled etc.)

2. Applying and analysing:

Seek out case studies which can expose the students to a range of EDI issues and contexts, e.g.:

a. Examples of “sustainable” engineering solutions aimed toward “wealthy” users but not available or suitable for the “poor”. Question if EDI was considered in stakeholder groups (who are the target end users, what are their specific needs, are the solutions applicable and affordable for diverse socioeconomic groups (e.g. high-tech expensive sophisticated medical devices, luxury cars).

b. Examples of product design suffering from discriminatory unconscious bias (e.g. medical devices unsuitable for women (Phillips SP, 2022); “affordable housing projects” being unaffordable for the local community, etc.).

c. Positive examples of sustainable engineering solutions with strong EDI perspectives taken that are also financially viable (e.g. sustainable water and sanitation projects, seaweed farming for food security and climate change mitigation (Sultana F, 2023), sustainable gem production (Center for Responsible Business (CRB), 2023) etc.)

3. Implementing, evaluating, and creating:

a. Use existing scenario-based modules to focus on finding solutions for the sustainability problems that will improve socioeconomic equality, access to water, improvement of healthcare, and reduction of poverty. This will guide students to implement sustainability principles in engineering while addressing social issues and inequalities.

b. In project-based modules, ask students to link their work with a specific UNSDG and evidence an approach to EDI issues.

4. Provide visibility of additional opportunities:

Extracurricular activities (maker spaces, EWB UK’s Engineering for People Design Challenge, partnership with local communities, etc.) can represent an additional mechanism to bolster the link between sustainable engineering practice and EDI issues. Some of these initiatives can even be implemented within modules via topics, projects, and case studies.

A systematic strategic approach will ensure that students gain experience in considering the views of all stakeholders, and not only economic and technical drivers (Faludi, et al., 2023). They need to take account of local know-how and community engagement since not all solutions will work in all circumstances (Montt-Blanchard, Najmi, & Spinillo, 2023). Engineering decisions need to be made bearing in mind the ethical, cultural, and political questions of concern in the local setting. Professional engineers need to develop a global mindset, taking into account diverse perspectives and experiences which will increase their potential to come up with creative, effective, and responsible solutions for these global challenges. (Jordan & Agi, 2021).

Leading by example:

It is of paramount importance that students experience that the HE institution itself embraces an inclusive and sustainable mindset. This should be within the institutional strategy and policies, everyday operations and within the classroom. Providing an experiential learning environment with an inclusive and sustainable mindset can have a paramount impact on the student experience and attitudes developed (Royal Academy of Engineering, 2018).

Conclusion:

Engineering education must prepare future professionals for responsible and ethical actions and solutions. Only the meaningful participation of all members of a global society will bring us to a fully sustainable future. Thus, the role of engineering educators is to embed an EDI perspective alongside sustainability in the attitudes of future professionals.

References:

Burleson, G., Lajoie, J., & et al. (2023). Advancing Sustainable Development: Emerging Factors and Futures for the Engineering Field.

Engineering Council. (2021). Guidance on Sustainability. London: Engineering Council UK.

Faludi, J., Acaroglu, L., Gardien, P., Rapela, A., Sumter, D., & Cooper, C. (2023). Sustainability in the Future of Design Education. The Journal of Design, Economics and Innovation, 157-178.

International Labour Organization. (2023). Transformative change and SDG 8: The critical role of collective capabilities and societal learning. Geneva: International Labour Organization.

Jordan, R., & Agi, K. (2021). Peace engineering in practice: A case study at the University of New Mexico. Technological Forecasting and Social Change, 173.

Montt-Blanchard, D., Najmi, S., & Spinillo, C. G. (2023). Considerations for Community Engagement in Design Education. The Journal of Design, Economics, and Innovation, 9(2), 234-263.

Phillips SP, G. K. (2022, Nov 5). Medical Devices, Invisible Women, Harmful Consequences. Int J Environ Res Public Health. 2022 Nov 5, 19(21).

Royal Academy of Engineering. (2018). Designing inclusion into engineering education. London: Royal Academy of Engineering.

Sultana F, e. a. (2023). Seaweed farming for food and nutritional security, climate change mitigation and adaptation, and women empowerment: A review. Aquaculture and Fisheries, 8(5), 463-480.

United Nations. (2023). The Sustainable Development Goals Report. New York: United Nations.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

To view a plain text version of this resource, click here to download the PDF.

Authors: Maryam Lamere, Marianthi Leon, Wendy Fowles-Sweet, Lucy Yeomans, Laura Fogg-Rogers (University of the West of England, UWE Bristol).

Topic: Opportunities and challenges for integrating ESD into engineering programmes via PBL.

Tool type: Guidance.

Relevant disciplines: Any.

Keywords: Education for sustainable development; Project-based learning; Problem-based learning; Engineering design; Sustainability; AHEP; UK-SPEC; Pedagogy; Higher education; Curriculum.

Sustainability competency: Critical thinking; Integrated problem-solving, Collaboration.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37. 

Related SDGs: SDG 4 (Quality education); SDG 13 (Climate action).

Reimagined Degree Map Intervention: More real-world complexity; Active pedagogies and mindset development.

Who is this article for? This article should be read by educators at all levels in higher education who are seeking an overall perspective on using PBL for integrating sustainability in engineering education. Engaging with this topic will also help to prepare students with the soft skill sets that employers are looking for.

Premise:

Engineering graduates are increasingly required to implement sustainability-focussed initiatives within industry, alongside enhanced expectations from professional bodies and the UK specification (UK-SPEC) for engineers (Engineering Council, 2024). However, a recent study of UK Higher Education institutions highlighted that only a handful have implemented Education for Sustainable Development (ESD) into their curricula in a systemic manner (Fiselier et al., 2018), which suggests many engineering institutions still need support in this area. This article aims to explain opportunities and challenges for integrating ESD into engineering programmes via project-based learning.

1. An overview of problem-based learning as a tool for teaching sustainability within engineering:

To develop sustainability-literate graduates, the Higher Education Academy (AdvanceHE) and the UK Quality Assurance Agency for Higher Education (QAA) emphasise that students need to:

understand what the concept of environmental stewardship means for their discipline and their professional and personal lives;
think about issues of social justice, ethics, and wellbeing, and how these relate to ecological and economic factors; and
develop a future-facing outlook by learning to think about the consequences of actions, and how systems and societies can be adapted to ensure sustainable futures (QAA & HEA, 2014).

Problem-Based Learning (PBL) provides a suitable teaching method for addressing these educational objectives. It is an influential approach in engineering education that emphasises real-world problem-solving and student-centred investigation. PBL deeply engages engineering students, prompting them to develop higher-level thinking skills while they personally confront and navigate economic, social, and environmental issues. This method fosters holistic systems thinking, interdisciplinary insights, ethical considerations, and an emphasis on the long-term viability of technical solutions (Cavadas and Linhares, 2023), while also inspiring and motivating learners (Loyens, 2015).

While PBL can be delivered through theoretical case study examples, the term is used interchangeably with Project-Based Learning within engineering education. Both problem-based learning and project-based learning share characteristics such as collaboration and group work, the integration of knowledge and practice, and foregrounding problem analysis as the basis of the learning process (De Graaff and Kolmos, 2003). One of the main differences is where the parameters lie: with problem-based learning the parameters are defined at the beginning and students are able to find a range of solutions; with project-based learning the parameters lie at the end and students are expected to reach a specific end solution (Savery, 2006). There is also a difference in the role of the tutor and the information they provide: in problem-based learning the tutor facilitates but gives little information, while in project-based learning they are both a facilitator and a source of knowledge (Savery, 2006). Project based learning may be more accepted within engineering education since it is considered to more closely resemble the reality of the profession (Perrenet, Bouhuijs and Smits, 2000), hence Aalborg’s working definition of PBL as “Problem-Oriented, Project-Organized, Learning” (Dym et al., 2005).

PBL thus facilitates the creation of immersive student-centric environments where group projects enable collaborative learning (Kokotsaki, Menzies and Wiggins, 2016). As Lozano et al. (2017) highlight, the nature of PBL advances critical thinking and problem-solving in engineering contexts, enabling students to critically reflect on sustainability concepts and apply this understanding to real-world challenges. Importantly, it is paramount in engineering education to foster action-oriented competencies and incorporate social contextualisation aspects (Fogg-Rogers et al., 2022), such as ethical nuances, justice, and equality, ensuring a comprehensive grasp of an engineer’s role amidst evolving societal and environmental challenges (Wang et al., 2022).

2. Overcoming challenges within PBL:

While PBL presents an obvious approach for embedding sustainability, there are a series of challenges which engineering educators need to overcome to facilitate transformational learning. This section presents some of the most common challenges encountered, along with pedagogic solutions.

Lack of apparent topic relevance
Sustainability topics can sometimes be treated as isolated topics, rather than an integrated aspect of an engineering problem. A perception of sustainability in engineering is that it is not implicit in design, manufacture, and operation; rather it is often perceived as an ‘add-on’ to technical skill development. This applies to both students and teachers: both require support to understand the relevance and complexities of sustainability. When academics delivering sustainability materials may struggle to relate the topic to their own engineering disciplines, students may fail to see how they can impact change. Students must work on real-world projects where they can make a difference locally or globally, and they are more inclined towards sustainability topics that are relevant to their subject discipline with subject experts.

Dealing with an overwhelming amount of information
Students can be overwhelmed by the large amounts of multidisciplinary information that needs to be processed when tackling real-world problems. This can also be a challenge for academics delivering teaching, especially if the topic is not related to their speciality. Additional support (and training), along with allocation of teaching workload, are needed to successfully integrate sustainability contexts for both staff and students.

Group work challenges
PBL is best conducted by mixing individual study and group work. However, groups can fail if group creation, monitoring, supporting, and assessing processes are inconsistent, or not understood by academic tutors or students. Tutors need to act as group facilitators to ensure successful collaborative learning.

Issues with continual engagement
PBL often requires active engagement of students over an extended period (several weeks or months). This can be a challenge, as over time, students’ focus and priorities can change. We suggest that whole programmes need to be designed around PBL components, so that other modules and disciplines provide the scaffolding and knowledge development to the relevant PBL topics.

Delivering PBL online

PBL is best delivered using experiential hands-on learning. For example, at UWE Bristol, this is provided through civic engagement with real-world industry problems and service learning through engagement with industry, schools, and community groups (Fogg-Rogers et al., 2017). This experiential learning was exceptionally challenging to deliver online during the COVID-19 pandemic, and programmes would need to be re-designed for online learning.

3. Recommendations for successful implementation of PBL:

Sustainability topics need to be embedded within engineering education so that each discipline-specific engineering problem is explored within PBL from a technical, economic, ethical, and sustainability perspective. Drawing from UWE Bristol’s journey of ESD implementation using PBL, key recommendations are outlined below.

Managing academic workload
In the initial phases of ESD integration at UWE Bristol, a small number of committed academics contributed a lot of time, effort, and dedication to push through and enable ESD acceptance from staff and students. Programme-wide implementation of ESD required wider support at the institutional level, alongside additional support for module leaders and tutors, so they felt capable of delivering ESD with a realistic workload.

Structured delivery of ESD
Structuring delivery over time and throughout different modules enables students to work through large amounts of information. Providing summative feedback/assessments during key phases of the PBL exercise can also help students stay on track and manage their workload. At UWE Bristol, group presentations with pass/fail grading are introduced mid-project, so students can present information gathered about the context, before beginning problem-solving.

Managing group work challenges
PBL is best conducted by mixing individual study and group work. Ensuring assessment briefs have implicit sustainability requirements is vital to embedding ESD concepts, so that students can see the need for engagement. This is further enhanced by stating the relevance to workplace contexts and UK-SPEC requirements. Tutors need to facilitate group dynamics and engagement, along with providing support structures for students who, for whatever reason, are unable to engage with group work.

Creating an enabling environment for ESD integration
The integration of sustainable development throughout the curricula at UWE Bristol has been supported at the institutional level, and this has been critical for the wide scale rollout. An institution-wide Knowledge Exchange for Sustainability Education (KESE) network was created to support staff by providing a platform for knowledge sharing. Within the department, Staff Away days were used to run sustainability workshops to discuss ESD and topics of interest to students. An initial mapping exercise was conducted to highlight where sustainability was already taught within the curriculum and to identify the discipline relevant contexts (Lamere et al., 2022). Further training and industrially relevant contexts were provided to convince some staff that sustainability needed to be included in the curriculum, along with evidence that it was already of great relevance in the wider engineering workplace. This led to the development of an integrated framework of key learning requirements which embedded professional attributes and knowledge of the UK-SPEC.

Student motivation and continual engagement

For sustainability education to be effective, the content coverage should be aligned, or better still, integrated, with the topics that form part of students’ disciplinary studies. To maintain continual engagement during the PBL delivery and beyond, clear linkages need to be provided between learning and future career-related practice-based sustainability activities. Partnerships have been developed with regional stakeholders and industry, to provide more context for real-world problems and to enable local service learning and community action (Fogg-Rogers, Fowles-Sweet, 2018). Industry speakers have also been invited to contribute to lectures, touching on a wide range of sustainability and ethical issues. ESD teaching is also firmly linked to the individual’s own professional development, using the UK-SPEC competency requirements, and linked to end-point assessments. This allows students to see the potential impact on their own professionalism and career development.

These recommendations can enable engineering educators to integrate sustainability topics within the curriculum using PBL to enhance student learning and engagement.

References:

Cavadas, B., Linhares, E. (2023). ‘Using a Problem-Based Learning Approach to Develop Sustainability Competencies in Higher Education Students’, in Leal Filho, et al. W., Azul, A.M., Doni, F., Salvia, A.L. (eds) Handbook of Sustainability Science in the Future. Springer, Cham. (Accessed 05 February 2024)

De Graaff, E. and Kolmos, A. (2003) ‘Characteristics of Problem-Based learning’. International Journal of Engineering Education. 19 (5), pp. 657–662.

Dym, C.L., et al. Agogino, A.M., Eris, O., Frey, D.D. and Leifer, L.J. (2005) ‘Engineering design thinking, teaching, and learning’. Journal of engineering education. 94 (1), pp. 103–120.

Engineering Council (2024). UK-SPEC Fourth Edition. (Accessed 05 February 2024).

Fogg-Rogers, L., Lewis, F., & Edmonds, J. (2017). ‘Paired peer learning through engineering education outreach’, European Journal of Engineering Education, 42(1). (Accessed 05 February 2024).

Fogg Rogers, L., & Fowles-Sweet, W. (2018). ‘Engineering and society: Embedding active service learning in undergraduate curricula’, in J. Andrews, R. Clark, A. Nortcliffe, & R. Penlington (Eds.), 5th Annual Symposium of the United Kingdom & Ireland Engineering Education Research Network (125-129). Aston University

Fogg-Rogers, L., Bakthavatchaalam, V., Richardson, D., & Fowles-Sweet, W. (2022). ‘Educating engineers to contribute to a regional goal of net zero carbon emissions by 2030’. Cahiers COSTECH, 5, Article 133

Fiselier, E. S., Longhurst, J. W. S., & Gough, G. K. (2018). ‘Exploring the current position of ESD in UK higher education institutions.’ International Journal of Sustainability in Higher Education, 19(2), 393–412.

Kokotsaki, D., Menzies, V. and Wiggins, A. (2016) ‘Project-based learning: A review of the literature.’ Improving Schools. 19 (3), pp. 267–277.

Lamere, M., Brodie, L., Nyamapfene, A., Fogg-Rogers, L., & Bakthavatchaalam, V. (2022). ‘Mapping and enhancing sustainability literacy and competencies within an undergraduate engineering curriculum’ in 9th Research in Engineering Education Symposium and 32nd Australasian Association for Engineering Education Conference (REES AAEE 2021) (298-306)

Lozano, R., Merrill, M.Y., Sammalisto, K., Ceulemans, K. and Lozano, F.J. (2017), ‘Connecting competences and pedagogical approaches for sustainable development in higher education: a literature review and framework proposal’, Sustainability, Vol. 9 No. 10, pp. 1889-1903.

Perrenet, J.C., Bouhuijs, P.A.J and Smits, J.G.M.M. (2000) ‘The Suitability of Problem based Learning for Engineering Education: Theory and practice.’ Teaching in Higher Education. 5 (3) pp.345-358.

QAA & HEA. (2014). Education for sustainable development: guidance for UK higher education providers. Retrieved from Gloucester, UK.

Savery, J.R. (2006) Overview of Problem-based Learning: Definitions and Distinctions. The Interdisciplinary Journal of Problem-based Learning. 1 (1), pp. 9–20.

Wang, Y., Sommier, M. and Vasques, A. (2022), ‘Sustainability education at higher education institutions: pedagogies and students’ competences’, International Journal of Sustainability in Higher Education, Vol. 23 No. 8, pp. 174-193.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Author: Mark J. Heslop (University of Strathclyde).

Topic: ESD in Chemical Engineering projects.

Tool type: Guidance.

Relevant disciplines: Chemical.

Keywords: Problem-based learning; Education for sustainable development; Circularity; Circular economy; Assessment; AHEP; Sustainability; Higher education; Design; Data; Pedagogy.

Sustainability competency: Systems-thinking; Collaboration; Integrated problem-solving.

AHEP mapping: This resource addresses two of the themes from the UK’s Accreditation of Higher Education Programmes fourth edition (AHEP4): The Engineer and Society (acknowledging that engineering activity can have a significant societal impact) and Engineering Practice (the practical application of engineering concepts, tools and professional skills). To map this resource to AHEP outcomes specific to a programme under these themes, access AHEP 4 here and navigate to pages 30-31 and 35-37. 

Related SDGs: SDG 2 (Zero hunger); SDG 3 (Good health and well-being); SDG 4 (Quality education); SDG 12 (Responsible consumption and production); SDG 13 (Climate action).

Reimagined Degree Map Intervention: Active pedagogies and mindset development; Authentic assessment; More real-world complexity.

Who is this article for? This article should be read by Chemical Engineering educators in higher education who are seeking to integrate sustainability in their project modules. Engaging with this topic will also help to prepare students with the soft skill sets that employers are looking for.

Premise:

The design project (DP) is considered to be the major focus of the CE curriculum, where students work in groups to design a complete chemical process – feeds, products process routes, energy requirements, financial aspects and emissions. It is considered challenging for various reasons including the following: the requirement to recall and combine knowledge covered previously in taught classes (some of which may have been forgotten), dealing with a huge corpus of data (unavailability, uncertainty, some being in conflict and some being superfluous) and all the design decisions that need to be made from many options. This is a major contrast with standard taught modules where all the data required is normally provided in advance. Just making decisions is not enough – they need to be timely and justified otherwise the project may be rushed and may not complete by the deadline. This is why the DP is valued by employers. Furthermore, if Education for Sustainable Development (ESD) is embedded in the design project, it is more likely that students will take forward sustainability into the workplace. Figure 1 illustrates Chemical processes and the design project.

1. Subject (CE) and DP pictorial representations:

Part (a) is a generic representation of a chemical process and shows the input-output nature of chemical processes. A chemical process takes a feed and converts it to useful products (the process shown has two equipment units and four streams). Part (b) is a representation of the design project, where the specification (or brief) is provided to groups at the start (DSpec) and the final submission (or solution) is the information in part (a). Part (c) shows that specifications can be product-based (the top two) or feed-based (the bottom two). The dashed lines indicate specifications where the flowrate and composition of the feed/product is subject to design choice – a typical factor that will extend the design procedure and require more decision-making.

2. Inclusion of sustainability in the project topic and communication with students:

This is fairly straightforward in CE design projects, because of the circular economy and the associated waste minimisation. So, from Figure 1, a feed-based (rather than product-based) specification can be employed. Topics that have been used at Strathclyde in recent years have been the utilisation of coffee grounds, food waste and (in 2024) green and garden waste. It is helpful that such topics can be linked to many of the UN SDGs. Furthermore, waste products are often complex with many components, and one of the characteristics of chemical engineering is the various separation techniques. These two factors should be communicated to students to improve engagement.

3. Inclusion of sustainability as an ESD activity to be carried out by groups:

One of the complicating factors about the UN SDGs is that there are so many, meaning that there is the possibility of a chemical process having both positive and negative impacts on different SDGs. This means that groups really need to consider all of the SDGs. This might be conveniently demonstrated as per Table 1. Certainly, it would be hoped that there are more ticks in column 2 than in column 3. Column 4 corresponds to minimal change, and column 5 where there is not enough information to determine any impact.

Table 1: Sustainability rating form for design project submissions

As an example, consider a design project which is based on better utilisation of green waste. Let us say that this results in less greenhouse gas emissions, as well as there being less need to plant and harvest plants. This will result in positive outcomes for SDG12 and SDG13. There are also positive effects because more land can be used for crops, and there will be higher plant coverage during the year. It could be argued then that there are minor positive effects om SDG2 and SDG3. The subsequent SDG profile in Table 1 shows two major impacts and two minor impacts – this might be typical for DPs.

4. Assessment of sustainability in the design project:

Table 2 shows the typical sections in a DP submission. For convenience these are shown as having equal 20-mark contributions. One way of determining marks is to divide these sections into a number of dimensions, for example: use of the literature, technical knowledge, creativity/innovation and style/layout. Sustainability could then be included as a fifth dimension. It is then a case of determining the sustainability dimension for each of the marking sections. It could be argued that sustainability is particularly important at the start of the project (when feeds and amounts are being decided) and at the end (when the final process is being assessed). This explains the larger weightings in Table 2. Coherence refers to how well the submission reads in terms of order and consistency and is thus independent of sustainability. The weightings are subject to debate, but they do at least give the potential for consistent (and traceable) grading between different assessors.

Table 2: Design project assessment now including ESD

References:

Byrne, E.P. (2023) “The evolving engineer; professional accreditation sustainability criteria and societal imperatives and norms”, Education for Chemical Engineers 43, pp. 23–30

Feijoo, G., Moreira, M.T. (2020) “Fostering environmental awareness towards responsible food consumption and reduced food waste in chemical engineering students”, Education for Chemical Engineers 33, pp. 27–35

IChemE (2021), “Accreditation of chemical engineering programmes: a guide for education providers and assessors”

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