Thermal energy storage based on sorption method is attractive in view of energy storage density, storage period, and flexibility. Three-phase sorption thermal energy storage is advantageous from high energy storage density, but its temperature lift is low. Besides, further energy storage density enhancement is needed to make the storage system more compact. In this paper, multi-functional three-phase sorption thermal energy storage cycles are proposed to achieve higher temperature lift and energy storage density simultaneously, in which different applications can be evident including interseasonal heating, combined cooling and heating in summer, and heat transformer in summer and winter. The performance of the proposed cycles for three operating modes is evaluated analytically with a working pair of LiCl/H₂O, due to its high absorption and crystallization enthalpy. Results showed that the multi-functional three-phase sorption thermal energy storage cycles obtained a temperature lift of 65°C and an energy storage density up to 1307 Wh/kg, which cannot be realized with a conventional three-phase cycle. Moreover, combined cold and heat storages at 15°C and 60°C, respectively, and discharging temperature more than 100°C are achieved. With these proposed cycles, a wider range of applications could be expected for three-phase sorption thermal energy storage.

考虑到能量存储密度，存储时间和灵活性，基于吸附法的热能存储是有吸引力的。三相吸附式热能储存器的优点是储存能量密度高，但其温度提升低。此外，需要进一步提高能量存储密度以使存储系统更紧凑。本文提出了多功能的三相吸附热能储存循环，以同时实现更高的温度提升和能量储存密度，在不同的应用中可以明显看出，包括季节间供热，夏季联合制冷和供热，以及夏季的热转换器。夏天和冬天。使用工作对的LiCl / H _2可以分析地评估三种操作模式下建议循环的性能O，由于其高吸收和结晶焓。结果表明，多功能三相吸附热能储存循环的温度提升为65°C，能量储存密度高达1307 Wh / kg，这是常规三相循环无法实现的。此外，可实现分别在15°C和60°C的冷库和热库的组合，以及高于100°C的排放温度。通过这些建议的循环，可以预期三相吸​​附热能存储的广泛应用。