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
祝洪青 1周宇飞 2张汉飞 2段立强2
作者信息
- 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
- 折叠
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㶲分析,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;系统㶲效率为 38.0%,其中太阳能集热场的㶲损最大,占总㶲损的 52.4%,其次是节流阀与热电发电机;在换热器中,冷箱和蒸发器㶲损较大.
Abstract
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/图像㶲分析Key words
liquid air energy storage/solar energy/parabolic trough collector/system integration/image exergy analysis引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据