期刊
JOURNAL OF ENERGY STORAGE
卷 33, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.est.2020.102054
关键词
Adiabatic compressed air energy storage; Thermodynamic analysis; Phase change materials; Thermal energy storage
资金
- Natural Science Foundation of China [51676151]
- Science and Technology Support Program of the Shaanxi Province [2017ZDXM-GY-127]
- National Key Research and Development Program of China [2018YFC1902701]
This study proposed a novel thermal energy storage strategy using multiple phase change materials to reduce thermal energy loss in adiabatic compressed air energy storage. Results showed that using multiple phase change materials could increase efficiency by 4.7%.
Adiabatic compressed air energy storage provides a promising solution for matching intermittent sources of renewable energy with customer demand during the daily cycle. In this work, a novel thermal energy storage strategy - using multiple phase change materials - are proposed to achieve less thermal energy loss in an adiabatic compressed air energy storage system, and the thermal energy storage performance of this type of thermal accumulators is discussed in detail by constructing the off-design thermodynamic mathematic model. The obtained results indicate that, compared with single-phase change material, a smaller amount of thermal energy loss appears while using multiple phase change materials stores compressed heat. Besides, in the initial cycles, there is still considerable residual heat remaining in the proposed thermal accumulator, however this will gradually fade away after 4 cycles, resulting in the thermal energy storage efficiency increases to 91.5%. It is confirmed that the round-trip efficiency increases by 4.7% if a thermal accumulator with multiple phase change materials was used for a conventional compressed air energy storage plant - Huntorf.
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