RESEARCH ON OPERATION MODE OF COMPRESSED AIR/CARBON DIOXIDE ENERGY STORAGE SYSTEM

Han Zhonghe; Sun Ye; Li Peng; Hu Qingya

doi:10.19912/j.0254-0096.tynxb.2020-0413

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (3) : 119-125. DOI: 10.19912/j.0254-0096.tynxb.2020-0413

RESEARCH ON OPERATION MODE OF COMPRESSED AIR/CARBON DIOXIDE ENERGY STORAGE SYSTEM

Han Zhonghe, Sun Ye, Li Peng, Hu Qingya

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Abstract

In order to deeply study the effect of different working medium and output modes on the performance of the solar energy-advanced adiabatic compressed air/carbon dioxide combined energy storage system, four operating schemes are proposed. Through simulation calculation, the difference the thermodynamic and economic characteristics of the system under four different schemes are compared and analyzed, and the influence of key parameters on system performance are also studied. The results show that the energy storage efficiency of the system is the highest when carbon dioxide is used as the working medium and only the electric energy is output. While the system uses carbon dioxide as the working medium and both electricity and heat are exported, the system has the largest annual profit margin. The energy storage efficiency and annual profit margin of the four schemes decrease with the increase of time interval. As the convective heat transfer coefficient becomes higher and higher, the energy storage efficiency and annual profit margin of the system decrease first and then increase. The higher the initial pressure of working medium, the higher the energy storage efficiency and annual profit margin of the four schemes.

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compressed air energy storage / carbon dioxide / performance analysis / operation modes / solar energy

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Han Zhonghe, Sun Ye, Li Peng, Hu Qingya. RESEARCH ON OPERATION MODE OF COMPRESSED AIR/CARBON DIOXIDE ENERGY STORAGE SYSTEM[J]. Acta Energiae Solaris Sinica. 2022, 43(3): 119-125 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0413

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