An Adsorption-Compression Cold Thermal Energy Storage System (ACCESS)

吸附压缩冷热能存储系统（ACCESS）

• 批准号: EP/W027593/2
• 负责人: Zhibin Yu
• 金额: $ 95.38万
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FW027593%2F2
• 关键词: Adsorption; Compression; Cold; Thermal; Energy

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.

目前，制冷行业消耗了英国约 14% 的电力，排放了英国约 10% 的温室气体。预计到 2050 年，全球仅用于空间制冷的电力需求就会增加两倍。此外，随着气温升高，制冷需求也会增加，但冰箱的性能系数会下降。这导致冰箱的高效运行与一天内的峰值制冷需求之间的时间不匹配。显然，这个问题在未来几十年将会恶化。事实上，UKERC 最近的研究报告称，到 2050 年，冷却行业将给英国电网带来 7 GW 的峰值电力需求。解决方案是采用冷热能存储，这使得制冷操作更加灵活，从而提高制冷效率并降低峰值电力需求。大规模部署冷热能存储可以大大减少峰值需求，减轻其对电网的影响。此外，由于网络限制，英国削减了大量风电。例如，2020年风电总量超过3.6TWh，有75%的天数被限电。因此，冷热储能技术通过压平能源需求，提供了利用错峰风电为冷热储能充电的手段。白天制冷需求高峰。 该项目基于拟议的新型吸附压缩热力循环，旨在开发一种创新的混合技​​术，用于零下温度下的制冷和冷热能存储。由此产生的冷热能存储系统完全集成在冰箱内，具有比现有技术显着更高的功率密度和能量密度，为大规模冷热能存储提供了颠覆性的新解决方案。所开发的技术可以利用非高峰或限电来削减大型制冷厂和区域冷却网络的峰值电力需求，从而减轻冷却部门对电网的影响，并降低运营成本。