Thermal economic evaluation method for photothermal hybrid adiabatic compressed air energy storage system based on the thermodynamics analysis
In order to improve the efficiency and economy of compressed air energy storage(CAES)system applied in the distributed integrated energy system,the research on the thermodynamics and thermoeconomics of hybrid adiabatic compressed air energy storage(HA-CAES)system is conduc-ted in this paper.HA-CAES system coupled with the distributed thermal collector is proposed.Firstly,a thermodynamic model of the system is established to explore the exergy loss and exergy effi-ciency of each subsystem.Then,based on the measured light data of three typical seasons(summer,transitional season and winter)in Haidong area of Qinghai,the profitability of the system under five heat allocation schemes is compared.The results are as follows:The thermal collector in the system has the highest thermal loss,while the storage room has the highest thermal efficiency.The distribu-ted photothermal subsystem has the highest heat collection and best system performance in summer.The smaller the electricity/heat distribution ratio,the higher the system economy is.After recovering the construction cost of HA-CAES system,its profitability is significantly better than that of advanced adiabatic compressed air energy storage(AA-CAES)system.
energy storage technologydistributed photothermal systemhybrid adiabatic compressed air energy storage systemthermodynamicsthermoeconomics