考虑灵活运行模式的太阳能集成液化空气储能系统性能研究  

Performance of an integrated solar liquid air energy storage system with flexible operation mode

作　　者：祝洪青 周宇飞 张汉飞 段立强[2] ZHU Hongqing;ZHOU Yufei;ZHANG Hanfei;DUAN Liqiang(State Nuclear Electric Power Planning Design&Research Institute Co.,Ltd.,Beijing 100095,China;School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]国核电力规划设计研究院有限公司,北京100095 [2]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《热力发电》2024年第10期32-40,共9页Thermal Power Generation

基　　金：国家自然科学基金项目(52076078)。

摘　　要：针对目前液化空气储能系统往返效率偏低的问题,提出了操作更加灵活的新型耦合太阳能热的液化空气储能系统。该系统放电过程配备了串联双级空气加热器,可在提高往返效率的同时允许系统在低太阳辐照情况下以传统方式运行。对新系统进行了主要参数敏感性分析和[火用]分析,结果表明:在允许范围内,液化温度越低,充电压力越低,放电压力越高,系统往返效率越高;系统最优往返效率可达72.4%,太阳辐射不足时系统仍能以53.6%的往返效率运行;系统[火用]效率为38.0%,其中太阳能集热场的[火用]损最大,占总[火用]损的52.4%,其次是节流阀与热电发电机;在换热器中,冷箱和蒸发器[火用]损较大。A new type of liquid air energy storage(LAES)system coupled with solar energy is proposed to address the issue of low round-trip efficiency(RTE)in current LAES systems.The discharging process of the new system is equipped with series-connected two-stage air heaters,which improves the RTE while allowing the system to operate in conventional ways under low solar radiation conditions.Sensitivity analysis of main parameters and exergy analysis are conducted on the new system,and the results show that,within the allowable range,the lower the liquefaction temperature,the lower the charging pressure and the higher the discharging pressure,resulting in higher RTE of the system.The optimal RTE of the system can reach 72.4%,and the system can still operate at an RTE of 53.6%when solar radiation is insufficient.The exergy efficiency of the new system is 38.0%,among which the solar collector field has the highest exergy destruction,accounting for 52.4%of the total exergy destruction,followed by the throttle valve and thermoelectric generator.In heat exchangers,there is significant exergy destruction in cold boxes and evaporators.

关 键 词：液化空气储能 太阳能 槽式集热器 系统集成 图像(火用)分析 

分 类 号：TK519[动力工程及工程热物理—热能工程] TK02