提出一种新型恒压喷水压缩空气储能系统，利用废弃煤矿等地下洞穴，在水下布置尼龙布管储存压缩空气，形成以地下洞穴为下库，地面水池为上库的水力辅助恒压压缩空气储气体系；膨胀与压缩过程采用单级多缸随转式膨胀压缩两用机实现，导热油蓄能和放能过程采用共享设备原路返回方案。通过建立系统的热力学模型，分析了在空气入口处喷水控制压缩空气出口温度，以及由地下洞穴深度确定的压缩段出口空气压力，环境温度等因素对系统性能的影响。分析表明：在压缩机出口压力及温度为10 MPa和320 ℃、环境温度25 ℃、换热端差10 ℃和膨胀压缩两用机等熵效率0.85的工况条件下，储能系统转换效率达到66.6%。

A novel isobaric compressed air energy storage system with water spray is proposed, using underground caverns such as abandoned coal mines, arranging nylon cloth pipe system in the tunnels under water to store compressed air, and forming a hydroassisted isobaric compressed air storage system with underground cavern as the lower reservoir and surface pool as the upper reservoir. This system adopts a single stage dualusage compressorexpander with synchronous rotating multicylinders in compression and expansion process. The backtracking method of shared equipment of heat transfer oil system is adopted in energy storage and release process. By establishing the thermodynamic model of the system, the influences of factors, such as the outlet temperature of compressed air controlled by water spray at air inlet andthe outlet air pressure and environment temperature at compression section determined by the depth of underground cavern,on the system performances are analyzed. The analysis results show that under the conditions of compressor outlet pressure and temperature of 10 MPa and 320 ℃, ambient temperature of 25 ℃, heat exchange pinch temperature difference of 10 ℃ and the dualusage compressorexpander isentropic efficiency of 0.85, the energy storage system conversion efficiency reaches 66.6%.

TK02

国家自然科学基金(51776035,51976033)