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Sensitivity analysis of the system exergy performance of the thermally integrated-Carnot battery based on the orthogonal design method

Author

Listed:
  • Xia, Xiaoxia
  • Yang, Chengwu
  • Sun, Chuansheng
  • Wang, Zhiqi
  • Zhang, Hualong
  • Li, Hongpeng
  • Wu, Jinhao

Abstract

The thermally integrated-Carnot battery offers an effective way for energy storage and waste heat recovery. In order to identify the exergy distribution characteristics, the conventional and advanced exergy analyses are firstly conducted. Then, in order to explore the impact degree and improvement effect of the irreversible parameters on system exergy performance, the sensitivity analysis is performed based on the orthogonal design method. Finally, the impact degree of the subsystems on system exergy performance is explored. The results show that the throttle valve has the largest exergy destruction (24.7 %) and avoidable exergy destruction (22.2 %). The heat pump evaporator has the largest endogenous avoidable exergy (19.8 %). The pinch point temperature difference of the heat pump subsystem and compressor isentropic efficiency have the greatest impact degree on system exergy destruction, system avoidable exergy destruction and system endogenous avoidable exergy destruction, respectively. Reducing the pinch point temperature difference of heat pump subsystem has the best improvement effect on system exergy performance. The impact rates of heat pump subsystem on system exergy destruction, system avoidable exergy destruction and system endogenous avoidable exergy destruction are 75.6 %, 63.5 % and 54.1 %, respectively. The research results have important guidance significance for improving the exergy performance of the Carnot battery.

Suggested Citation

  • Xia, Xiaoxia & Yang, Chengwu & Sun, Chuansheng & Wang, Zhiqi & Zhang, Hualong & Li, Hongpeng & Wu, Jinhao, 2025. "Sensitivity analysis of the system exergy performance of the thermally integrated-Carnot battery based on the orthogonal design method," Energy, Elsevier, vol. 335(C).
    • Handle: RePEc:eee:energy:v:335:y:2025:i:c:s036054422503573x
    DOI: 10.1016/j.energy.2025.137931
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    1. Xia, Xiaoxia & Sun, Chuansheng & Li, Jiajia & Liu, Xinxin & Zhang, Xingyu & Gong, Siyu & Yang, Chengwu & Wang, Zhiqi, 2025. "Research on the matching modes between the thermal storage methods and working fluid types of the thermally integrated Carnot battery system," Energy, Elsevier, vol. 339(C).

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