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Exergy and exergoeconomic analyses of solar and biomass electricityed trigeneration system integrated with organic Rankine cycle under thermodynamic function

Author

Listed:
  • Yang, Kun
  • Yang, Ziwei
  • Du, Na
  • Chen, Yuzhu
  • Chai, Yufei
  • Wang, Jiangjiang
  • Cao, Lixiao

Abstract

This paper investigates the dynamic exergy and exergoeconomic performance of a combined cooling, heating and power (CCHP) system utilizing a combination of solar and biomass energy sources, along with the integration of an organic Rankine cycle(ORC). The dynamic operational performance of the system was first simulated and validated using MATLAB/Simulink. Second, the dynamic exergy performance of the system was analyzed based on the simulation results. Third, the dynamic exergoeconomic performance of the system was investigated using the structural theory of thermoeconomics based on the energy level. Research indicates that absorption chiller/heater(AC) does not exhibit a consistent variation in response to changes in load rates when utilizing exhaust gas and direct combustion. The ORC's performance is significantly affected by solar radiation intensity and exposure duration. Furthermore, exergoeconomic cost analysis reveals that the cost of electricity generation via the ORC system surpasses that of internal combustion engines(ICE), with average costs of 152.20 and 104.31 USD/MW during summer, and 248.15 and 124.19 USD/MW during winter, respectively. Additionally, ICE shows considerable adaptability to changes in load rates, and enhancing AC system performance is crucial during increased load scenarios.

Suggested Citation

  • Yang, Kun & Yang, Ziwei & Du, Na & Chen, Yuzhu & Chai, Yufei & Wang, Jiangjiang & Cao, Lixiao, 2025. "Exergy and exergoeconomic analyses of solar and biomass electricityed trigeneration system integrated with organic Rankine cycle under thermodynamic function," Renewable Energy, Elsevier, vol. 243(C).
    • Handle: RePEc:eee:renene:v:243:y:2025:i:c:s0960148125001582
    DOI: 10.1016/j.renene.2025.122496
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