Title: Exergoeconomic optimisation of a geothermal-enhanced cooling and power generation system: a multi-objective approach

Authors: Ali Esmaeili; Shoaib Khanmohammadi; Hossein Tamim; Ali Abbasi

Addresses: Department of Mechanical Engineering, Islamic Azad University, Arak Branch, Arak, Iran ' Department of Mechanical Engineering, Kermanshah University of Technology, Kermanshah, Iran ' Department of Mechanical Engineering, Islamic Azad University, Arak Branch, Arak, Iran ' Department of Mechanical Engineering, Islamic Azad University, Arak Branch, Arak, Iran

Abstract: This study examines a multi-generation geothermal power plant, comparing a basic cycle and an advanced cycle. The basic cycle generates electricity only, while the advanced cycle simultaneously produces electricity, cooling, and hydrogen. Despite a reduction in energy and exergy efficiency, the advanced cycle offers benefits like hydrogen production and improved cooling capacity. It delivers 106.7 kW of net electricity and 21.36 kW of cooling load. Exergy destruction and parametric analyses were performed to assess system performance and efficiencies. Multi-criteria optimisation was used to identify the optimal operational conditions of the proposed system.

Keywords: geothermal; upgraded; refrigeration; parametric study; multi-objective optimisation.

DOI: 10.1504/IJEX.2025.150020

International Journal of Exergy, 2025 Vol.48 No.3, pp.205 - 222

Received: 04 Jan 2025
Accepted: 27 Feb 2025
Published online: 21 Nov 2025 *

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