热电共蓄式压缩空气储能系统特性研究

Performance Analysis of a High Temperature Hybrid Compressed Air Energy Storage System

本文通过考虑透平机械特性曲线等非设计工况特性,对热电共蓄式压缩空气储能系统进行性能分析,并与同等条件T的绝热压缩空气储能系统进行了性能对比。初次循环的充放电效率为63.9%,且?损最大的部件为电加热器;多次循环性能分析显示随着循环次数的增多,充放电效率不断增大直至最后稳定;通过与绝热压缩空气储能系统进行性能对比发现,电加热器的加入能够有效提高储能系统的功率和能量等级,且电加热温度与充放电效率负相关。

In this paper,based on the consideration of the turbomachinery’s off-design condition,such as the characteristic maps,the performance analysis of a high temperature hybrid compressed air energy storage(HTH-CAES)system is carried out.The performance comparison between the HTH-CAES and the advanced adiabatic CAES(AA-CAES)is also implemented.In the first cycle,the round trip efficiency of the HTH-CAES system is 63.9%and the largest exergy loss component is the electric heaters.In the consecutive cycles,the round trip efficiency increases with the raised cycle numbers till a stable condition.Comparing with the AA-CAES,it can be found that the addition of electrical heaters can improve the energy/power capacity of energy storage system.Meanwhile,the electric heating temperature has a negative effect on system round trip efficiency.