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Optimization and performance evaluation for liquid air energy storage based on liquid natural gas cold energy utilization
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Junxian LI1, 2, Yanjiang LIU3, Kun LIU3, Zhaozhao GAO1, Liubiao CHEN1, 2, Junjie WANG1, 2
Thermal Power Generation | 2024, 53(9) : 69 - 77
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Thermal Power Generation | 2024, 53(9): 69-77
• Liquid air energy storage technology •
Optimization and performance evaluation for liquid air energy storage based on liquid natural gas cold energy utilization
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Junxian LI1, 2, Yanjiang LIU3, Kun LIU3, Zhaozhao GAO1, Liubiao CHEN1, 2, Junjie WANG1, 2
Affiliations
  • 1.Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • 2.University of Chinese Academy of Sciences, Beijing 100049, China
  • 3.China Green Development Investment Group Co., Ltd., Beijing 100020, China
Published: 2024-09-25 doi: 10.19666/j.rlfd.202406126
Outline
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Liquid air energy storage (LAES) is a promising technology for large-scale energy storage due to its geographical flexibility and high energy storage density. To further improve the round-trip efficiency and economic benefits of LAES, a novel integrated system combining liquid natural gas (LNG) cold energy utilization and organic Rankine cycle (ORC) with LAES is proposed. Thermodynamic and economic analysis methods for the integrated system are established, and the effects of key parameters on the system’s thermal performance are investigated based on simulations. An economic analysis of the system is also conducted. The results show that, as the system’s expansion pressure increases, both efficiency and power output rise, but at a decreasing rate. The system’s round-trip efficiency increases with more expansion stages up to a point, then decreases. With four-stage expansion, the system efficiency reaches 62.26%, which is 7%~12% higher than that of the conventional LAES system. When the difference between peak and valley electricity prices is 0.848 yuan/(kW·h), the net present value, dynamic payback period, and levelized cost of electricity are 119 058 500 yuan, 4.48 years, and 0.893 yuan/(kW·h), respectively. The results of this study can provide a reference for engineering application and efficiency improvement of LAES systems.

liquid air energy storage  /  LNG cold energy utilization  /  organic Rankine cycle
Junxian LI, Yanjiang LIU, Kun LIU, Zhaozhao GAO, Liubiao CHEN, Junjie WANG. Optimization and performance evaluation for liquid air energy storage based on liquid natural gas cold energy utilization[J]. Thermal Power Generation, 2024 , 53 (9) : 69 -77 . DOI: 10.19666/j.rlfd.202406126
Funding
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  • Postdoctoral Fellowship Program of CPSF(GZC20241778)
  • Technological Innovation Projects of China Green Development Investment Group Co., Ltd.(202309CHDD020)
Appendix
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Year 2024 volume 53 Issue 9
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98
44
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Article Info
doi: 10.19666/j.rlfd.202406126
  • Receive Date：2024-06-15
  • Online Date：2026-03-06
  • Published：2024-09-25
Article Data
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History
  • Received：2024-06-15
Funding
Postdoctoral Fellowship Program of CPSF(GZC20241778)
Technological Innovation Projects of China Green Development Investment Group Co., Ltd.(202309CHDD020)
Affiliations
    1.Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
    3.China Green Development Investment Group Co., Ltd., Beijing 100020, China
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