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Performance Assessment of low-temperature A-caes(Adiabatic Compressed Air Energy Storage)Plants

Journal of Thermal Science 2022年第5期31卷 1279-1292页

作者： TOLA Vittorio MARCELLO Francesca Carolina COCCO Daniele CAU Giorgio Department of Mechanical Chemical and Materials EngineeringUniversity of Cagliari09123 CagliariItaly

The widespread diffusion of renewable energy sources calls for the development of high-capacity energy storage systems as the A-caes(Adiabatic Compressed Air Energy Storage)*** this framework,low temperature(100℃–200℃)A-caes(LT-Acaes)systems can assume a key role,avoiding some critical issues connected to the operation of high temperature *** this paper,two different LT-Acaes configurations are *** two configurations are characterized by the same turbomachines and compressed air storage section,while differ in the TES section and its integration with the *** particular,the first configuration includes two separated cycles:the working fluid(air)cycle and the heat transfer fluid(HTF)*** heat exchangers connect the two cycles allowing to recover thermal energy from the compressors and to heat the compressed air at the turbine *** different HTFs were considered:air(case A)and thermal oil(case B).The second configuration is composed of only one cycle,where the operating fluid and the HTF are the same(air)and the TES section is composed of three different packed-bed thermal storage tanks(case C).The tanks directly recover the heat from the compressors and heat the air at each turbine inlet,avoiding the use of heat *** LT-Acaes systems were modelled and simulated using the ASPEN-Plus and the MATLAB-Simulink *** main aim of this study was the detailed analysis of the reciprocal influence between the turbomachinery and the TES system;furthermore,the performance evaluation of each plant was carried out assuming both on-design and off-design operating ***,the different configurations were compared through the main performance parameters,such as the round-trip efficiency.A total power output of around 10 MW was set,leading to a TES tank volume ranging between 500 and 700 m^(3).The second configuration with three TES systems appears to be the most promising in terms of round-trip efficiency

关键词： compressed air energy storage low temperature a-caes Thermal Energy Storage system integration

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