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Performance of an integrated solar liquid air energy storage system with flexible operation mode
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Hongqing ZHU1, Yufei ZHOU2, Hanfei ZHANG2, Liqiang DUAN2
Thermal Power Generation | 2024, 53(10) : 32 - 40
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Thermal Power Generation | 2024, 53(10): 32-40
• Long-term energy storage technology •
Performance of an integrated solar liquid air energy storage system with flexible operation mode
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Hongqing ZHU1, Yufei ZHOU2, Hanfei ZHANG2, Liqiang DUAN2
Affiliations
  • 1.State Nuclear Electric Power Planning Design & Research Institute Co., Ltd., Beijing 100095, China
  • 2.School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
Published: 2024-10-25 doi: 10.19666/j.rlfd.202406140
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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.

liquid air energy storage  /  solar energy  /  parabolic trough collector  /  system integration  /  image exergy analysis
Hongqing ZHU, Yufei ZHOU, Hanfei ZHANG, Liqiang DUAN. Performance of an integrated solar liquid air energy storage system with flexible operation mode[J]. Thermal Power Generation, 2024 , 53 (10) : 32 -40 . DOI: 10.19666/j.rlfd.202406140
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  • National Natural Science Foundation of China(52076078)
Appendix
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Year 2024 volume 53 Issue 10
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54
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Article Info
doi: 10.19666/j.rlfd.202406140
  • Receive Date：2024-06-11
  • Online Date：2026-03-05
  • Published：2024-10-25
Article Data
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History
  • Received：2024-06-11
Funding
National Natural Science Foundation of China(52076078)
Affiliations
    1.State Nuclear Electric Power Planning Design & Research Institute Co., Ltd., Beijing 100095, China
    2.School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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