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A comparative study and optimization of enhanced integrated geothermal flash and Kalina cycles: A thermoeconomic assessment

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  • Mokarram, N. Hassani
  • Mosaffa, A.H.

Abstract

This work deals with a comparative study for different basic and enhanced integrated geothermal flash and Kalina cycles from the thermoeconomic point of view. The considered cycles include different combination of basic and modified Kalina cycles, basic geothermal single flash cycle, double flash cycle and its enhanced modes. The basic Kalina cycle is modified by employing a two-phase expander instead of the throttling valve. Also, in order to enhance geothermal flash cycle, the geofluid steam is heated by a part of the heat contained in the geofluid at the wellhead before entering the turbine. Moreover, the effects of different key parameters on the thermodynamic and economic performances are investigated and optimized using the genetic algorithm method. The results show that when enhanced double flash/modified Kalina cycle is used, generated power increases by 6% compare to the basic cycle under the optimum operating condition. In this case, the increment of unit production cost is ignorable compared to the basic cycle. The exergy destruction rate of each component is calculated under the optimum operating condition. For all considered cycles, the highest value of exergy destruction rate belongs to the evaporator.

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  • Mokarram, N. Hassani & Mosaffa, A.H., 2018. "A comparative study and optimization of enhanced integrated geothermal flash and Kalina cycles: A thermoeconomic assessment," Energy, Elsevier, vol. 162(C), pages 111-125.
    • Handle: RePEc:eee:energy:v:162:y:2018:i:c:p:111-125
    DOI: 10.1016/j.energy.2018.08.041
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    3. Cao, Yan & Mihardjo, Leonardus WW. & Dahari, Mahidzal & Ghaebi, Hadi & Parikhani, Towhid & Mohamed, Abdeliazim Mustafa, 2021. "An innovative double-flash binary cogeneration cooling and power (CCP) system: Thermodynamic evaluation and multi-objective optimization," Energy, Elsevier, vol. 214(C).
    4. Cao, Yan & Dhahad, Hayder A. & Togun, Hussein & Hussen, Hasanen M. & Anqi, Ali E. & Farouk, Naeim & Issakhov, Alibek, 2021. "Feasibility investigation of a novel geothermal-based integrated energy conversion system: Modified specific exergy costing (M-SPECO) method and optimization," Renewable Energy, Elsevier, vol. 180(C), pages 1124-1147.
    5. Cheng, Ziyang & Wang, Jiangfeng & Yang, Peijun & Wang, Yaxiong & Chen, Gang & Zhao, Pan & Dai, Yiping, 2022. "Comparison of control strategies and dynamic behaviour analysis of a Kalina cycle driven by a low-grade heat source," Energy, Elsevier, vol. 242(C).
    6. Gholizadeh, Towhid & Vajdi, Mohammad & Rostamzadeh, Hadi, 2020. "A new trigeneration system for power, cooling, and freshwater production driven by a flash-binary geothermal heat source," Renewable Energy, Elsevier, vol. 148(C), pages 31-43.
    7. Feili, Milad & Rostamzadeh, Hadi & Ghaebi, Hadi, 2020. "A new high-efficient cooling/power cogeneration system based on a double-flash geothermal power plant and a novel zeotropic bi-evaporator ejector refrigeration cycle," Renewable Energy, Elsevier, vol. 162(C), pages 2126-2152.
    8. Zhang, Mingming & Timoshin, Anton & Al-Ammar, Essam A. & Sillanpaa, Mika & Zhang, Guiju, 2023. "Power, cooling, freshwater, and hydrogen production system from a new integrated system working with the zeotropic mixture, using a flash-binary geothermal system," Energy, Elsevier, vol. 263(PD).

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