Performance analysis of multi-generation liquefied air energy storage system
SUN Xinqiang
Abstract：Current research on liquid air energy storage(LAES)technology mostly focuses on single-output electrical energy systems,with a lack of in-depth studies on the performance of multi-product systems.A liquefied air energy storage system for cold,heat and power multi-generation is proposed,and its thermodynamic performance is analyzed.The results show that the system can output 3 155.24 kW of electrical energy,and supply 1 234.89 kW of cooling energy and 1 217.49 kW of thermal energy.The energy efficiency of the system is 89.14%,the round-trip electrical efficiency is 50.15%,and the exergy efficiency is 51.82%.Compared with the basic liquefied air energy storage system,both energy efficiency and exergy efficiency have been improved.During the charging stage,its exergy efficiency is 79.78%.The exergy loss ratios of the throttle valve and cold box 2#are the highest,at 34.42%and 17.65%,respectively.During the discharge stage,its exergy efficiency is 82.55%,and the exergy loss ratios of the absorption chiller and evaporator 1#are 30.27%and 15.37%,respectively.Through exergy loss analysis,the main irreversible loss locations in the system are identified,providing a reference for subsequent parameter optimization.
Keywords：multi-generationliquid air energy storagethermal performance analysis
Publication Date：2025-07-25
Online Publishing Date：2025-09-15(First online date of this platform, not the publication date of the document)
Pages：4( 43-46 )