Title: Energetic and exergetic analysis of multi-energy hybrid system including geothermal, green hydrogen, and cold energy storage

Authors: Gamze Soyturk; Onder Kizilkan

Addresses: Department of Mechanical Engineering, Faculty of Technology, Isparta University of Applied Sciences, 32200, Isparta, Türkiye ' Department of Mechanical Engineering, Faculty of Technology, Isparta University of Applied Sciences, 32200, Isparta, Türkiye

Abstract: This research delves into a thorough examination of a multi-energy system, combining geothermal energy, hydrogen (H₂) generation, and cold energy storage. The system aims to establish an eco-friendly energy infrastructure by integrating these sustainable sources and storage methods. The study evaluates the system's energy performance, scrutinising energy inputs, outputs, losses, and conversions across various components and subsystems. Furthermore, it conducts an exergy analysis to assess the effectiveness of energy transformations within the system, pinpointing areas of irreversibility and exergy dissipation. The findings reveal that the overall energetic efficiency stands at 11.31%, while the exergetic efficiency reaches 31.69%.

Keywords: geothermal energy; green hydrogen; cold energy storage; energy; exergy.

DOI: 10.1504/IJEX.2025.146044

International Journal of Exergy, 2025 Vol.46 No.3/4, pp.244 - 256

Received: 01 Jun 2024
Accepted: 25 Sep 2024
Published online: 02 May 2025 *

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