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Parametric optimization of a solar-driven Braysson heat engine with variable heat capacity of the working fluid and radiation–convection heat losses

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  • Wu, Lanmei
  • Lin, Guoxing
  • Chen, Jincan

Abstract

An irreversible solar-driven Braysson heat engine system is presented, in which the temperature-dependent heat capacity of the working fluid, the radiation–convection heat losses of the solar collector and the irreversibilities resulting from heat transfer and non-isentropic compression and expansion processes are taken into account. Based on the thermodynamic analysis method and the optimal control theory, the mathematical expression of the overall efficiency of the system is derived and the maximum overall efficiency is calculated, and the operating temperatures of the solar collector and the cyclic working fluid and the ratio of heat-transfer areas of the heat engine are optimized. By using numerical optimization technology, the influences of the variable heat capacity of the working fluid, the radiation–convection heat losses of the solar collector and the multi-irreversibilities on the performance characteristics of the solar-driven heat engine system are investigated and evaluated in detail. Moreover, it is expounded that the optimal performance and important parametric bounds of the irreversible solar-driven Braysson heat engine with the constant heat capacity of the working fluid and the irreversible solar-driven Carnot heat engine can be deduced from the conclusions in the present paper.

Suggested Citation

  • Wu, Lanmei & Lin, Guoxing & Chen, Jincan, 2010. "Parametric optimization of a solar-driven Braysson heat engine with variable heat capacity of the working fluid and radiation–convection heat losses," Renewable Energy, Elsevier, vol. 35(1), pages 95-100.
    • Handle: RePEc:eee:renene:v:35:y:2010:i:1:p:95-100
    DOI: 10.1016/j.renene.2009.07.015
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    References listed on IDEAS

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    1. Sogut, Oguz Salim & Durmayaz, Ahmet, 2005. "Performance optimization of a solar driven heat engine with finite-rate heat transfer," Renewable Energy, Elsevier, vol. 30(9), pages 1329-1344.
    2. Zhang, Yue & Lin, Bihong & Chen, Jincan, 2007. "Optimum performance characteristics of an irreversible solar-driven Brayton heat engine at the maximum overall efficiency," Renewable Energy, Elsevier, vol. 32(5), pages 856-867.
    3. Sahin, Bahri & Ust, Yasin & Yilmaz, Tamer & Akcay, Ismail Hakki, 2006. "Thermoeconomic analysis of a solar driven heat engine," Renewable Energy, Elsevier, vol. 31(7), pages 1033-1042.
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    6. Ust, Yasin, 2007. "Effects of combined heat transfer on the thermo-economic performance of irreversible solar-driven heat engines," Renewable Energy, Elsevier, vol. 32(12), pages 2085-2095.
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    1. Chandramouli, R. & Srinivasa Rao, M.S.S. & Ramji, K., 2015. "Parametric and optimization studies of reheat and regenerative Braysson cycle," Energy, Elsevier, vol. 93(P2), pages 2146-2156.
    2. Chandramouli, R. & Srinivasa Rao, M.S.S. & Ramji, K., 2015. "Energy and exergy based thermodynamic analysis of reheat and regenerative Braysson cycle," Energy, Elsevier, vol. 90(P2), pages 1848-1858.
    3. Le Roux, W.G. & Bello-Ochende, T. & Meyer, J.P., 2013. "A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 677-690.

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