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Finite-time optimizations of a heat engine

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  • Lee, Won Y.
  • Kim, Sang S.
  • Won, Seung H.

Abstract

We study the power and efficiency of a finite-time heat engine. We consider an endoreversible Carnot heat engine coupled to heating and cooling fluids and determine the maximum power output and efficiency to obtain a bound on the power-conversion systems. While the maximum power and the operating temperatures of the heat engine are functions of the heat-reservoir temperatures, heat-reservoir capacity rates and heat-transfer rates, the efficiency at maximum power depends primarily on the initial temperatures of the heating and cooling fluids. The efficiency at maximum power provides a measure of the power available in a practical heat engine.

Suggested Citation

  • Lee, Won Y. & Kim, Sang S. & Won, Seung H., 1990. "Finite-time optimizations of a heat engine," Energy, Elsevier, vol. 15(11), pages 979-985.
    • Handle: RePEc:eee:energy:v:15:y:1990:i:11:p:979-985
    DOI: 10.1016/0360-5442(90)90023-U
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    Cited by:

    1. Khaliq, Abdul & Kumar, Rajesh, 2005. "Finite-time heat-transfer analysis and ecological optimization of an endoreversible and regenerative gas-turbine power-cycle," Applied Energy, Elsevier, vol. 81(1), pages 73-84, May.
    2. Lee, Won-Yong & Kim, Minjin & Sohn, Young-Jun & Kim, Seung-Gon, 2016. "Power optimization of a combined power system consisting of a high-temperature polymer electrolyte fuel cell and an organic Rankine cycle system," Energy, Elsevier, vol. 113(C), pages 1062-1070.
    3. Lee, Won-Yong & Kim, Minjin & Sohn, Young-Jun & Kim, Seung-Gon, 2017. "Performance of a hybrid system consisting of a high-temperature polymer electrolyte fuel cell and an absorption refrigerator," Energy, Elsevier, vol. 141(C), pages 2397-2407.
    4. Guo, Xinru & Zhang, Houcheng & Hu, Ziyang & Hou, Shujin & Ni, Meng & Liao, Tianjun, 2021. "Energetic, exergetic and ecological evaluations of a hybrid system based on a phosphoric acid fuel cell and an organic Rankine cycle," Energy, Elsevier, vol. 217(C).
    5. Khaliq, Abdul, 2004. "Finite-time heat-transfer analysis and generalized power-optimization of an endoreversible Rankine heat-engine," Applied Energy, Elsevier, vol. 79(1), pages 27-40, September.

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