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Advanced exergy analysis of a novel mass integration cogeneration system driven by geothermal energy

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  • Li, Chengyun
  • Yang, Jiawen
  • Chen, Chao
  • Xiang, Shuguang
  • Wang, Lili
  • Xia, Li

Abstract

To mitigate fossil energy consumption and increase renewable energy use, a novel mass integration cogeneration system (MICS) driven by geothermal energy is proposed in this work. Parametric evaluations are conducted in order to ascertain crucial system parameters. The system is analyzed thermodynamically utilizing exergy analysis and advanced exergy analysis. The findings indicate a direct relationship between the refrigeration coefficient of performance and the power generation efficiency, as well as the mass flow rate of the working fluid, the turbine input pressure, the valve outlet pressure, and the mass fraction of the working fluid at the generator outlet. Exergy analysis reveals that the exergy efficiency of the MICS is greater than 0.85. The condenser exhibits the highest exergy destruction, amounting to 54.52 kW. Given that around 40 % of exergy destruction in power consumption devices (such as turbines, compressors, and pumps) is preventable, there is significant potential for improvement. Furthermore, the MICS employs 50 % less working fluid compared to a heat integration cogeneration system. The implementation of advanced exergy analysis in this study will facilitate the progress of geothermal energy utilization systems, while the investigation of optimization possibilities will assist in their practical deployment in the industry.

Suggested Citation

  • Li, Chengyun & Yang, Jiawen & Chen, Chao & Xiang, Shuguang & Wang, Lili & Xia, Li, 2025. "Advanced exergy analysis of a novel mass integration cogeneration system driven by geothermal energy," Renewable Energy, Elsevier, vol. 239(C).
    • Handle: RePEc:eee:renene:v:239:y:2025:i:c:s0960148124020986
    DOI: 10.1016/j.renene.2024.122030
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    References listed on IDEAS

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