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Performance optimization of a solar driven heat engine with finite-rate heat transfer

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  • Sogut, Oguz Salim
  • Durmayaz, Ahmet

Abstract

An optimal performance analysis for an equivalent Carnot-like cycle heat engine of a parabolic-trough direct-steam-generation solar driven Rankine cycle power plant at maximum power and maximum power density conditions is performed. Simultaneous radiation-convection and only radiation heat transfer mechanisms from solar concentrating collector, which is the high temperature thermal reservoir, are considered separately. Heat rejection to the low temperature thermal reservoir is assumed to be convection dominated. Irreversibilities are taken into account through the finite-rate heat transfer between the fixed temperature thermal reservoirs and the internally reversible heat engine. Comparisons proved that the performance of a solar driven Carnot-like heat engine at maximum power density conditions, which receives thermal energy by either radiation-convection or only radiation heat transfer mechanism and rejects its unavailable portion to surroundings by convective heat transfer through heat exchangers, has the characteristics of (1) a solar driven Carnot heat engine at maximum power conditions, having radiation heat transfer at high and convective heat transfer at low temperature heat exchangers respectively, as the allocation parameter takes small values, and of (2) a Carnot heat engine at maximum power density conditions, having convective heat transfer at both heat exchangers, as the allocation parameter takes large values. Comprehensive discussions on the effect of heat transfer mechanisms are provided.

Suggested Citation

  • 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.
  • Handle: RePEc:eee:renene:v:30:y:2005:i:9:p:1329-1344
    DOI: 10.1016/j.renene.2004.10.004
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    References listed on IDEAS

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    1. Al-Sakaf, Omar H., 1998. "Application possibilities of solar thermal power plants in Arab countries," Renewable Energy, Elsevier, vol. 14(1), pages 1-9.
    2. Göktun, S. & Özkaynak, S. & Yavuz, H., 1993. "Design parameters of a radiative heat engine," Energy, Elsevier, vol. 18(6), pages 651-655.
    3. Şahi̇n, Bahri̇ & Kodal, Ali̇ & Yavuz, Hasbi̇, 1996. "Maximum power density for an endoreversible carnot heat engine," Energy, Elsevier, vol. 21(12), pages 1219-1225.
    4. 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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    Cited by:

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    3. 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.
    4. 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.
    5. Yilmaz, Tamer & Ust, Yasin & Erdil, Ahmet, 2006. "Optimum operating conditions of irreversible solar driven heat engines," Renewable Energy, Elsevier, vol. 31(9), pages 1333-1342.
    6. Li, Yuqiang & Liu, Gang & Liu, Xianping & Liao, Shengming, 2016. "Thermodynamic multi-objective optimization of a solar-dish Brayton system based on maximum power output, thermal efficiency and ecological performance," Renewable Energy, Elsevier, vol. 95(C), pages 465-473.

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