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Comparison of combined heat and power systems using an organic Rankine cycle and a low-temperature heat source

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  • Mohammed Khennich
  • Nicolas Galanis
  • Mikhail Sorin

Abstract

Two combined heat and power (CHP) systems using an organic Rankine cycle with R134a and a source at 100°C are modeled. The vapor generator pressure which maximizes the specific (i.e. per unit mass flowrate of the heat source) net power output is determined for different values of the specific heat load and a characteristic temperature difference DT related to the temperature pinch of the heat exchangers. The optimal trade-offs between power and heat outputs are defined and explained for two CHP systems. The results show that both systems generate less mechanical power than the heat delivered to the heating load and that a higher fraction of the heat source is used as the heating load increases. The effects of the specific heat load and of DT on the total thermal conductance, the total exergy destruction and other variables are presented. Copyright , Oxford University Press.

Suggested Citation

  • Mohammed Khennich & Nicolas Galanis & Mikhail Sorin, 2013. "Comparison of combined heat and power systems using an organic Rankine cycle and a low-temperature heat source," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 8(suppl_1), pages 42-46, April.
    • Handle: RePEc:oup:ijlctc:v:8:y:2013:i:suppl_1:p:i42-i46
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctt028
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    Cited by:

    1. Eyerer, Sebastian & Dawo, Fabian & Schifflechner, Christopher & Niederdränk, Anne & Spliethoff, Hartmut & Wieland, Christoph, 2022. "Experimental evaluation of an ORC-CHP architecture based on regenerative preheating for geothermal applications," Applied Energy, Elsevier, vol. 315(C).
    2. Habka, Muhsen & Ajib, Salman, 2014. "Investigation of novel, hybrid, geothermal-energized cogeneration plants based on organic Rankine cycle," Energy, Elsevier, vol. 70(C), pages 212-222.
    3. Shiyang Teng & Yong-Qiang Feng & Tzu-Chen Hung & Huan Xi, 2021. "Multi-Objective Optimization and Fluid Selection of Different Cogeneration of Heat and Power Systems Based on Organic Rankine Cycle," Energies, MDPI, vol. 14(16), pages 1-22, August.
    4. Wieland, Christoph & Meinel, Dominik & Eyerer, Sebastian & Spliethoff, Hartmut, 2016. "Innovative CHP concept for ORC and its benefit compared to conventional concepts," Applied Energy, Elsevier, vol. 183(C), pages 478-490.
    5. Zhao, Yajing & Wang, Jiangfeng & Cao, Liyan & Wang, Yu, 2016. "Comprehensive analysis and parametric optimization of a CCP (combined cooling and power) system driven by geothermal source," Energy, Elsevier, vol. 97(C), pages 470-487.

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