Performance Analysis of Liquid-liquid Carbon Dioxide Energy Storage System
With the popularization of intermittent renewable energy,energy storage system plays a key role in the power grid.Compared with the air energy storage system,the carbon dioxide one has advantages of higher energy storage density,easy liquefaction,and environmental friendliness.In this paper,a liquid-liquid carbon dioxide energy storage system was established and Aspen Plus simulation software was used to model and analyze energy storage process.The influences from energy-storing pressure,energy-releasing pressure,compressor inlet pressure,throttle valve pressure drop,compressor efficiency,expander effi-ciency and other parameters on system performance were revealed.Finally,the parameters of this carbon dioxide energy storage system were analyzed to obtain optimal process parameters of the system.In addi-tion,the system was analyzed to obtain Exergy loss distribution and causes thereof.
carbon dioxide energy storage systemthermodynamicsparameter optimizationExergy analysis
NETL
NSTL
万方数据
维普
