Energetic and exergetic study of a system utilizing geothermal energy from a thermodynamic perspective for multigeneration purposes.

Articles in Press

Document Type : Research Paper

Authors

1 Mechanical Engineering Department, Engineering Faculty, Urmia University, Urmia, Iran

2 Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran

10.22104/hfe.2025.7169.1324

Abstract

Recent research has focused more on high-efficiency systems using renewable energies due to the need to control global warming, prevent ozone layer destruction, and ensure stable and accessible energy sources. One of the renewable energy sources capable of powering thermodynamic systems to generate one or more products is geothermal energy. The efficiency of a stand-alone flash-binary geothermal power plant decreases due to the loss of input energy. To improve its overall performance and reduce costs, structural modifications and waste heat recovery can be used. The current study proposes and explores an innovative waste heat recovery system for a dual-flash binary geothermal power plant. This integrated process includes a Rankine cycle and a proton exchange membrane electrolyzer. The system focuses on two main processes: converting waste heat to power and producing hydrogen from power. The feasibility of the system is assessed based on energy, exergy, and economic perspectives. EES software was applied to analyze the system. According to the results, the energy and exergy efficiencies of the system are 23.97 % and 35.35 %, respectively. Moreover, the total amount of power produced by the system which is the combination of two turbines and two TEGs is 5981 kW. This system produces 0.0295 kg/s hydrogen. Furthermore, according to the exergy destruction rate, TEG 2 and compressor have the highest amounts of exergy destruction rates.

Keywords

Main Subjects

Hydrogen, Fuel Cell & Energy Storage

Articles in Press, Accepted Manuscript
Available Online from 16 May 2026

Files

Share

How to cite

Statistics