新型太阳能辅热式CAES系统热力特性分析

Thermal Characteristic Analysis of a New Solar Auxiliary Heating CAES System

针对传统压缩空气储能系统(CAES)能量效率较低的问题,该文提出新型太阳能辅热式变压比CAES系统(变压比CAES+CSP+ORC)。利用Aspen Plus软件对变压比CAES+CSP+ORC系统和定压比CAES+CSP+ORC系统进行仿真模拟,并对结果进行热力性能分析。结果表明,CAES+CSP+ORC系统可有效提高系统储能效率和太阳能利用效率;同时研究系统热力性能随系统释能压力、透平初温和释气流量的变化规律。

Aiming at the low energy efficiency of traditional compressed air energy storage system(CAES),this paper proposes a new solar auxiliary heating type variable pressure ratio CAES system(variable pressure ratio CAES+CSP+ORC).The variable pressure ratio CAES+CSP+ORC system and constant pressure ratio CAES+CSP+ORC system are simulated by Aspen Plus software,and the thermal performance of the system is analyzed.The results show that the CAES+CSP+ORC system can effectively improve the energy storage efficiency and solar energy utilization efficiency of the system.At the same time,the variation of thermal performance of the system with the system energy release pressure,turbine initial temperature and gas flow rate is studied.