The cooling sector currently consumes around 14% of the UK's electricity and emits around 10% of the UK's greenhouse gases. Global electricity demand for space cooling alone is forecast to triple by 2050. Moreover, as air temperature increases, the cooling demand increases, but a refrigerator's Coefficient of Performance decreases. This results in a time mismatch between a refrigerator's efficient operation and peak cooling demand over a day. Clearly, this problem will deteriorate over the coming decades. Indeed, research by UKERC recently reported that cooling sector will cause a 7 GW peak power demand to the grid by 2050 in the UK. A solution is to employ cold thermal energy storage, which allows much more flexible refrigeration operation, thereby resulting in improved refrigeration efficiency and reduced peak power demand. Large-scale deployment of cold thermal energy storage could dramatically reduce this peak demand, mitigating its impact to the grid. Moreover, the UK curtails large amounts of wind power due to network constraints. For example, over 3.6TWh of wind energy in total was curtailed on 75% of days in 2020. Therefore, through flattening energy demand, cold thermal energy storage technology provides a means to use off-peak wind power to charge cold thermal energy storage for peak daytime cooling demand. This project, based on the proposed novel adsorption-compression thermodynamic cycle, aims to develop an innovative hybrid technology for both refrigeration and cold thermal energy storage at sub-zero temperatures. The resultant cold thermal energy storage system is fully integrated within the refrigerator and potentially has significantly higher power density and energy density than current technologies, providing a disruptive new solution for large scale cold thermal energy storage. The developed technology can utilise off-peak or curtailed electricity to shave the peak power demand of large refrigeration plants and district cooling networks, and thus mitigates the impacts of the cooling sector on the grid and also reduces operational costs.

The UK has set a target to reach net zero emissions by 2050. Heat accounts for nearly half of the UK's energy consumption. Among several possible solutions, heat pumps are considered as one of the most promising technologies for decarbonising the domestic heating sector. Among all heat pumps, air source heat pumps (ASHP) are the most cost-effective option for householders. the Committee on Climate Change (CCC) recommends mass deployment of heat pumps to comply with the net zero target, and their net zero 'Further Ambition' scenario includes the deployment of 19 million heat pumps in homes by 2050. However, the uptake of heat pumps in the UK is very low at present. In 2018, heat pump sales in the UK were around 27,000 units (most are ASHPs), significantly lower than other EU countries. This represents a grand challenge for the government, industry, business, and research communities. There are a number of technological and non-technological barriers hindering the wide uptake of heat pumps, particularly air source heat pumps in the UK. There is a mismatch between the current ASHP products and the existing infrastructure and property configuration. Over 80% of houses in the UK use gas boilers for space heating, so their heat emitters (i.e., radiators) are designed for high temperature heat supply using gas boilers. However, most ASHPs available in the market have a relatively low heat production temperature. Secondly, ASHPs are vulnerable to ambient conditions. Their heating capacity and coefficient of performance drop dramatically as the ambient air temperature falls. Furthermore, frost starts to build up at the surface of the outdoor unit when the air temperature drops to around 6 C, so the outdoor units have to be regularly defrosted. Non-technical barriers have also played an important role behind the low uptake of heat pumps. The current UK heat pump market suffers from high capital cost and a low awareness of the product. This project, based on the PI's pending patent (Application number: 2015531.3), aims to develop a novel flexible, multi-mode air source heat pump (ASHP). This offers energy-free defrosting and is capable of continuous heating during frosting, thus eliminating the backup heater that is required by current ASHPs. We will address the key technical and non-technical challenges through interdisciplinary innovations. Our project is also supported by leading industrial companies with substantial contributions (e.g. the compressor). The developed technology offers energy-free defrosting and can be operated at different modes to benefit from off-peak electricity and/or warm air during the daytime. It will be much more energy-efficient than the current products, and thus could facilitate rapid uptake of air source heat pumps, making an important contribution to the decarbonisation of the domestic heating sector in the UK.

The UK Foundation Industries (Glass, Metals, Cement, Ceramics, Bulk Chemicals and Paper), are worth £52B to the UK economy, produce 28 million tonnes of materials per year and account for 10% of the UK total CO2 emissions. These industries face major challenges in meeting the UK Government's legal commitment for 2050 to reduce net greenhouse gas emissions by 100% relative to 1990, as they are characterised by highly intensive use of both resources and energy. While all sectors are implementing steps to increase recycling and reuse of materials, they are at varying stages of creating road maps to zero carbon. These roadmaps depend on the switching of the national grid to low carbon energy supply based on green electricity and sustainable sources of hydrogen and biofuels along with carbon capture and storage solutions. Achievement of net zero carbon will also require innovations in product and process design and the adoption of circular economy and industrial symbiosis approaches via new business models, enabled as necessary by changes in national and global policies. Additionally, the Governments £4.7B National Productivity Investment Fund recognises the need for raising UK productivity across all industrial sectors to match best international standards. High levels of productivity coupled with low carbon strategies will contribute to creating a transformation of the foundation industry landscape, encouraging strategic retention of the industries in the UK, resilience against global supply chain shocks such as Covid-19 and providing quality jobs and a clean environment. The strategic importance of these industries to UK productivity and environmental targets has been acknowledged by the provision of £66M from the Industrial Strategy Challenge Fund to support a Transforming Foundation Industries cluster. Recognising that the individual sectors will face many common problems and opportunities, the TFI cluster will serve to encourage and facilitate a cross sectoral approach to the major challenges faced. As part of this funding an Academic Network Plus will be formed, to ensure the establishment of a vibrant community of academics and industry that can organise and collaborate to build disciplinary and interdisciplinary solutions to the major challenges. The Network Plus will serve as a basis to ensure that the ongoing £66M TFI programme is rolled out, underpinned by a portfolio of the best available UK interdisciplinary science, and informed by cross sectoral industry participation. Our network, initially drawn from eight UK universities, and over 30 industrial organisations will support the UK foundation industries by engaging with academia, industry, policy makers and non-governmental organisations to identify and address challenges and opportunities to co-develop and adopt transformative technologies, business models and working practices. Our expertise covers all six foundation industries, with relevant knowledge of materials, engineering, bulk chemicals, manufacturing, physical sciences, informatics, economics, circular economy and the arts & humanities. Through our programme of mini-projects, workshops, knowledge transfer, outreach and dissemination, the Network will test concepts and guide the development of innovative outcomes to help transform UK foundation industries. The Network will be inclusive across disciplines, embracing best practice in Knowledge Exchange from the Arts and Humanities, and inclusive of the whole UK academic and industrial communities, enabling access for all to the activity programme and project fund opportunities.