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Energy and exergy analyses of single flash geothermal power plant at optimum separator temperature

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  • Mamdouh El Haj Assad
  • Yashar Aryanfar
  • Salar Radman
  • Bashria Yousef
  • Mohammadreza Pakatchian

Abstract

In this work, a thermodynamic analysis consisting of energy and exergy analyses is carried out to determine the performance of a single flash geothermal power plant. A new derivation for determination of the optimum separator temperature, which results in maximum turbine power output, is achieved. The energy and exergy analyses are carried out at that optimum separator temperature. The thermodynamic derivation showed that the separator would result in maximum performance of the power plant when it operates at the average value of the production well and condenser temperatures. Moreover, the derivation was numerically validated by calculating three different values for the geothermal well temperatures. The results show that the highest exergy destruction rate is in the expansion valve followed by the steam turbine, the mixing process and the pump. The separator has exactly zero exergy destruction rate while the condenser has almost zero exergy destruction rate. The results also show that the exergy destruction rate for all components of the power plant decreases with reduction in the geofluid temperature of the production well except for the condenser. The maximum energy efficiency of the power plant is about 12.5, 11 and 9.5% when the geofluid of the geothermal well temperature is 300, 275 and 250°C, respectively.

Suggested Citation

  • Mamdouh El Haj Assad & Yashar Aryanfar & Salar Radman & Bashria Yousef & Mohammadreza Pakatchian, 2021. "Energy and exergy analyses of single flash geothermal power plant at optimum separator temperature," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 16(3), pages 873-881.
    • Handle: RePEc:oup:ijlctc:v:16:y:2021:i:3:p:873-881.
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctab014
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    Citations

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    Cited by:

    1. Moein Shamoushaki & Mehdi Aliehyaei & Farhad Taghizadeh-Hesary, 2021. "Energy, Exergy, Exergoeconomic, and Exergoenvironmental Assessment of Flash-Binary Geothermal Combined Cooling, Heating and Power Cycle," Energies, MDPI, vol. 14(15), pages 1-24, July.
    2. Mahmoudan, Alireza & Samadof, Parviz & Hosseinzadeh, Siamak & Garcia, Davide Astiaso, 2021. "A multigeneration cascade system using ground-source energy with cold recovery: 3E analyses and multi-objective optimization," Energy, Elsevier, vol. 233(C).
    3. Ali Komeili Birjandi & Morteza Fahim Alavi & Mohamed Salem & Mamdouh El Haj Assad & Natarajan Prabaharan, 2022. "Modeling carbon dioxide emission of countries in southeast of Asia by applying artificial neural network [Energy and exergy analyses of single flash geothermal power plant at optimum separator temp," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 17, pages 321-326.
    4. Vaccari, Marco & Pannocchia, Gabriele & Tognotti, Leonardo & Paci, Marco, 2023. "Rigorous simulation of geothermal power plants to evaluate environmental performance of alternative configurations," Renewable Energy, Elsevier, vol. 207(C), pages 471-483.
    5. Aryanfar, Yashar & Mohtaram, Soheil & García Alcaraz, Jorge Luis & Sun, HongGuang, 2023. "Energy and exergy assessment and a competitive study of a two-stage ORC for recovering SFGC waste heat and LNG cold energy," Energy, Elsevier, vol. 264(C).
    6. Mamdouh El Haj Assad & Yashar Aryanfar & Amirreza Javaherian & Ali Khosravi & Karim Aghaei & Siamak Hosseinzadeh & Juan Pabon & SMS Mahmoudi, 2021. "Energy, exergy, economic and exergoenvironmental analyses of transcritical CO2 cycle powered by single flash geothermal power plant [Modeling of geothermal power system equipped with absorption ref," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 16(4), pages 1504-1518.
    7. MaryamNooman AlMallahi & Mamdouh El Haj Assad & Sameh AlShihabi & Reza Alayi, 2022. "Multi-criteria decision-making approach for the selection of cleaning method of solar PV panels in United Arab Emirates based on sustainability perspective [Mind the gap: a social sciences review o," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 17, pages 380-393.
    8. Moein Shamoushaki & Giampaolo Manfrida & Lorenzo Talluri & Pouriya H. Niknam & Daniele Fiaschi, 2021. "Different Geothermal Power Cycle Configurations Cost Estimation Models," Sustainability, MDPI, vol. 13(20), pages 1-19, October.
    9. Jiansheng, Wang & Lide, Su & Qiang, Zhu & Jintao, Niu, 2022. "Numerical investigation on power generation performance of enhanced geothermal system with horizontal well," Applied Energy, Elsevier, vol. 325(C).

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