RESEARCH ON CHARACTERISTIES OF CCHP SYSTEM BASED ON COMPRESSED AIR ENERGY STORAGE

Han Zhonghe; Hu Qingya; Li Peng

doi:10.19912/j.0254-0096.tynxb.2021-0406

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (10) : 409-415. DOI: 10.19912/j.0254-0096.tynxb.2021-0406

RESEARCH ON CHARACTERISTIES OF CCHP SYSTEM BASED ON COMPRESSED AIR ENERGY STORAGE

Han Zhonghe, Hu Qingya, Li Peng

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Abstract

Based on advanced adiabatic compressed air energy storage （AA-CAES）, a combined cooling, heating and power （CCHP） generation system is constructed. The system characteristics under four different gas storage chamber （GSC） and operation schemes are compared. The sensitivity analysis is carried out for the key parameters. The results show that, when the constant-temperature GSC and the sliding-pressure operation are adopted, the energy storage efficiencies and exergy efficiencies have the maximum values. The energy density is the highest when the constant-temperature GSC and the constant-pressure operation is used. The largest exergy destruction occurs in the second-stage heat exchanger （HE2）, and HE2 is the primary optimization goal. As the efficiency of the heat exchanger increases, the energy storage efficiencies and exergy efficiencies appear to turning points. The greater the GSC maximum pressure ratio, the smaller the energy storage efficiencies and exergy efficiencies, and the bigger the energy densities. When the constant-temperature GSC is adopted, the system is not affected by compression/expansion power. However, when constant-wall-temperature GSC is adopted, higher compression/expansion power is conducive to energy storage efficiency and exergy efficiency, but an increase in compression power will reduce energy density.

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Han Zhonghe, Hu Qingya, Li Peng. RESEARCH ON CHARACTERISTIES OF CCHP SYSTEM BASED ON COMPRESSED AIR ENERGY STORAGE[J]. Acta Energiae Solaris Sinica. 2022, 43(10): 409-415 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0406

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