Title: Energy, exergy, exergoeconomic and environmental analysis and optimisation of a flash-binary geothermal CCHP system based on TRCC cycle

Authors: Mohammad Seyyedi; Farhad Hosseinnejad; Keyvan Fallah

Addresses: Department of Mechanical Engineering, Sari Branch, Islamic Azad University, Sari, Iran ' Department of Mechanical Engineering, Sari Branch, Islamic Azad University, Sari, Iran ' Department of Mechanical Engineering, Sari Branch, Islamic Azad University, Sari, Iran

Abstract: The purpose of the present work is to optimise a novel flash-binary geothermal CCHP system based on TRCC cycle. Through optimisation, the values of separator pressure and power generation cost, energy and exergy efficiencies are set to 300 kPa, 2.764 cent/kwh, 23.81% and 16.03%, respectively. Furthermore, highest amounts of capital cost rate, exergy destruction cost rate and total cost rate are for turbine 1, exchanger 1 and turbine 2, respectively. The reduction of emission of CO₂ and cost of emission in the proposed cycle is 2.4 kg/s and 300 USD/hr, respectively.

Keywords: geothermal; CCHP; TRCC; exergy; optimisation.

DOI: 10.1504/IJEX.2025.146050

International Journal of Exergy, 2025 Vol.46 No.3/4, pp.299 - 310

Received: 20 Apr 2024
Accepted: 05 Oct 2024
Published online: 02 May 2025 *

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