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Power optimization of an endoreversible closed intercooled regenerated Brayton-cycle coupled to variable-temperature heat-reservoirs

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Listed:
  • Wang, Wenhua
  • Chen, Lingen
  • Sun, Fengrui
  • Wu, Chih

Abstract

In this paper, in the viewpoint of finite-time thermodynamics and entropy-generation minimization are employed. The analytical formulae relating the power and pressure-ratio are derived assuming heat-resistance losses in the four heat-exchangers (hot- and cold-side heat exchangers, the intercooler and the regenerator), and the effect of the finite thermal-capacity rate of the heat reservoirs. The power optimization is performed by searching the optimum heat-conductance distributions among the four heat-exchangers for a fixed total heat-exchanger inventory, and by searching for the optimum intercooling pressure-ratio. When the optimization is performed with respect to the total pressure-ratio of the cycle, the maximum power is maximized twice and a [`]double-maximum' power is obtained. When the optimization is performed with respect to the thermal capacitance rate ratio between the working fluid and the heat reservoir, the double-maximum power is maximized again and a thrice-maximum power is obtained. The effects of the heat reservoir's inlet-temperature ratio and the total heat-exchanger inventory on the optimal performance of the cycle are analyzed by numerical examples.

Suggested Citation

  • Wang, Wenhua & Chen, Lingen & Sun, Fengrui & Wu, Chih, 2005. "Power optimization of an endoreversible closed intercooled regenerated Brayton-cycle coupled to variable-temperature heat-reservoirs," Applied Energy, Elsevier, vol. 82(2), pages 181-195, October.
    • Handle: RePEc:eee:appene:v:82:y:2005:i:2:p:181-195
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    References listed on IDEAS

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    1. Chen, Lingen & Li, Ye & Sun, Fengrui & Wu, Chih, 2004. "Power optimization of open-cycle regenerator gas-turbine power-plants," Applied Energy, Elsevier, vol. 78(2), pages 199-218, June.
    2. Wu, Chih & Chen, Lingen & Sun, Fengrui, 1996. "Performance of a regenerative Brayton heat engine," Energy, Elsevier, vol. 21(2), pages 71-76.
    3. Chen, Lingen & Wang, Wenhua & Sun, Fengrui & Wu, Chih, 2004. "Closed intercooled regenerator Brayton-cycle with constant-temperature heat-reservoirs," Applied Energy, Elsevier, vol. 77(4), pages 429-446, April.
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    2. Goodarzi, Mohsen & Kiasat, Mohsen & Khalilidehkordi, Ehsan, 2014. "Performance analysis of a modified regenerative Brayton and inverse Brayton cycle," Energy, Elsevier, vol. 72(C), pages 35-43.
    3. Xia, Zhengrong & Zhang, Yue & Chen, Jincan & Lin, Guoxing, 2008. "Performance analysis and parametric optimal criteria of an irreversible magnetic Brayton-refrigerator," Applied Energy, Elsevier, vol. 85(2-3), pages 159-170, February.
    4. Ust, Yasin & Sahin, Bahri & Kodal, Ali & Akcay, Ismail Hakki, 2006. "Ecological coefficient of performance analysis and optimization of an irreversible regenerative-Brayton heat engine," Applied Energy, Elsevier, vol. 83(6), pages 558-572, June.
    5. Choudhary, Tushar & Sanjay,, 2017. "Thermodynamic assessment of SOFC-ICGT hybrid cycle: Energy analysis and entropy generation minimization," Energy, Elsevier, vol. 134(C), pages 1013-1028.
    6. Sanjay, & Prasad, Bishwa N., 2013. "Energy and exergy analysis of intercooled combustion-turbine based combined cycle power plant," Energy, Elsevier, vol. 59(C), pages 277-284.

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