Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Exergy and Entransy Performance Characteristics of Cogeneration System in Parallel Circuit Using Low-Grade Heat Source

저등급 열원으로 구동되는 병렬 열병합 발전시스템의 엑서지와 엔트랜시 성능 특성

  • KIM, KYOUNG HOON (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • KIM, KYOUNGJIN (Department of Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • JUNG, YOUNGGUAN (Department of Mechanical Engineering, Kumoh National Institute of Technology)
  • 김경훈 (금오공과대학교 기계공학과) ;
  • 김경진 (금오공과대학교 기계시스템공학과) ;
  • 정영관 (금오공과대학교 기계공학과)
  • Received : 2021.01.30
  • Accepted : 2021.02.28
  • Published : 2021.02.28
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Abstract

In this paper, entransy analysis is carried out for combined heat and power (CHP) generation system driven by low-grade heat source compared with energy and exergy analyses. The system consists of an organic Rankine cycle (ORC) and an additional process heater in a parallel circuit. Special attention is paid to the effects of the source temperature, turbine inlet pressure, and the working fluid on the thermodynamic performance of the system. Results showed that the work efficiency of entransy is higher than that of energy but lower than that of exergy, wheress the process heat efficiency of entransy is lower than that of energy but higher than that of exergy. Entrancy analysis showed the potential to complement the exergy analysis in the optimal design of the energy system.

Keywords

References

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