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Effect of the working fluid on the optimum work of binary-flashing geothermal power plants

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  • Edrisi, Baktosh H.
  • Michaelides, Efstathios E.

Abstract

Geothermal energy is an excellent form of renewable energy, which is continuously available for the production of electric power. At present, a very high percentage of geothermal power is generated by power systems that directly use the geofluid from a geothermal reservoir to produce electricity, such as dry steam and flashing power systems. These power plants operate at higher temperatures, typically greater than 160 °C. It appears that most of these high temperature geothermal reservoirs have already been developed and this leaves only the lower temperature resources available for the expansion and for the next generation of geothermal power plants. This paper examines the operation of a new system, the binary-flashing power plant, which may be used to harness more efficiently the available energy of geothermal resources at the lower range of resource temperatures. The paper compares the operation of the binary-flashing systems with the typical binary systems using the following substances as working fluids: normal butane, isobutane, hexane, pentane, refrigerant-114, and ammonia. It is observed that when both systems are optimized, the binary-flashing units would produce 25% more work than the typical binary units and that hexane and pentane appear to be better working fluids for these units.

Suggested Citation

  • Edrisi, Baktosh H. & Michaelides, Efstathios E., 2013. "Effect of the working fluid on the optimum work of binary-flashing geothermal power plants," Energy, Elsevier, vol. 50(C), pages 389-394.
    • Handle: RePEc:eee:energy:v:50:y:2013:i:c:p:389-394
    DOI: 10.1016/j.energy.2012.10.025
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    Cited by:

    1. Alvin Kiprono Bett & Saeid Jalilinasrabady, 2021. "Optimization of ORC Power Plants for Geothermal Application in Kenya by Combining Exergy and Pinch Point Analysis," Energies, MDPI, vol. 14(20), pages 1-17, October.
    2. Lee, Ung & Jeon, Jeongwoo & Han, Chonghun & Lim, Youngsub, 2017. "Superstructure based techno-economic optimization of the organic rankine cycle using LNG cryogenic energy," Energy, Elsevier, vol. 137(C), pages 83-94.
    3. Brady Bokelman & Efstathios E. Michaelides & Dimitrios N. Michaelides, 2020. "A Geothermal-Solar Hybrid Power Plant with Thermal Energy Storage," Energies, MDPI, vol. 13(5), pages 1-19, February.
    4. Talebi, S. & Goudarzi, N. & Nourouzi Dehka, Sepideh, 2021. "Using organic fluids in natural circulation loop systems for absorbing of heat from low temperature renewable energy sources," Energy, Elsevier, vol. 222(C).
    5. Lecompte, Steven & Huisseune, Henk & van den Broek, Martijn & Vanslambrouck, Bruno & De Paepe, Michel, 2015. "Review of organic Rankine cycle (ORC) architectures for waste heat recovery," Renewable and Sustainable Energy Reviews, Elsevier, vol. 47(C), pages 448-461.
    6. Yuan Zhao & Bowen Du & Shunyi Chen & Jun Zhao & Zhipeng Guo & Lingbao Wang, 2022. "Energy and Conventional and Advanced Exergy Analyses of Low-Temperature Geothermal Binary-Flashing Cycle Using Zeotropic Mixtures," Energies, MDPI, vol. 15(10), pages 1-18, May.
    7. Zeyghami, Mehdi, 2015. "Performance analysis and binary working fluid selection of combined flash-binary geothermal cycle," Energy, Elsevier, vol. 88(C), pages 765-774.
    8. Xie, Yingchun & Nie, Yutai & Li, Tailu & Zhang, Yao & Wang, Jingyi, 2023. "Flash evaporation strategy of organic Rankine cycle for geothermal power performance enhancement: A case study," Renewable Energy, Elsevier, vol. 212(C), pages 57-69.

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