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Advanced exergy analysis of the high-temperature PEMFC system integrated Kalina cycle with concentrating photovoltaic (CPV)

Author

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  • Liu, Wenjing
  • Ge, Dianhui
  • Lei, Xiandao
  • Yu, Zeting
  • Wang, Daohan

Abstract

This study first proposed an integrated system with the high-temperature proton exchange membrane fuel cells (HT-PEMFC), Kalina cycle, concentrating photovoltaic (CPV), half effect-absorption refrigeration system (HE-ABS). The advanced exergy analysis for the proposed system was carried out, and thus the directions and suggestions for improvement were given for each component. The key findings showed that the endogenous unavoidable exergy destruction of HT-PEMFC and CPV accounted for the maximum proportion of exergy destruction, reaching 88.94% and 93.45%, respectively. This indicated that the HT-PEMFC and CPV provide few contributions to the total improvement potential. For the Kalina subsystem, the endogenous avoidable exergy destruction of turbine was the largest, accounting for 55.17%. Optimizing the turbine's design parameters such as blade profile, inlet/outlet pressure ratio can significantly reduce exergy destruction. The exogenic avoidable exergy destruction of the high-pressure absorber in the HE-ABS possessed the maximum proportion of exergy destruction (85.6%). In order to reduce the exergy destruction, it was necessary to improve the matching degree with other interconnected components. Overall, by applying advanced exergy analysis to a multi-energy integrated system with four subsystems, this study addressed the research gap in advanced exergy decomposition for complex multi-energy systems, and offered targeted optimization strategies.

Suggested Citation

  • Liu, Wenjing & Ge, Dianhui & Lei, Xiandao & Yu, Zeting & Wang, Daohan, 2026. "Advanced exergy analysis of the high-temperature PEMFC system integrated Kalina cycle with concentrating photovoltaic (CPV)," Renewable Energy, Elsevier, vol. 266(C).
    • Handle: RePEc:eee:renene:v:266:y:2026:i:c:s096014812600529x
    DOI: 10.1016/j.renene.2026.125704
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