Thermoeconomic study of a multigeneration system with gas turbine waste heat recovery

Articles in Press

Document Type : Research Paper

Authors

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

10.22104/hfe.2025.7167.1323

Abstract

The increasing demand for energy and resulting crisis pose a significant challenge for the world. Consequently, there is a growing inclination towards the utilization of renewable energy sources. A critical method for reducing fossil fuel consumption involves recovering heat from the combustion gases of fossil fuels in gas turbines. This approach not only reduces fuel usage but also diminishes carbon dioxide emissions, thereby contributing to environmental preservation. An assessment of energy, exergy, and exergoeconomic perspectives was conducted through a simulation of the combined cycle of steam Rankine and organic Rankine, which involved waste gases from gas turbines. Freshwater and hydrogen were produced using an RO unit and PEM electrolyzer. The impact of varying system parameters on performance factors was thoroughly investigated. System analysis was carried out using EES software. The results indicated that the initial energy efficiency and overall exergy values are 24.92% and 15.01%, respectively, with an output work of 320412.8 kW. Additionally, the replacement of SRC and ORC condensers with two TEG units led to an additional power production of 5046.8 kW. Exergy destruction rate assessments revealed that the GT and SRC cycles exhibit the highest levels of exergy destruction.

Keywords

Main Subjects

Hydrogen, Fuel Cell & Energy Storage

Articles in Press, Accepted Manuscript
Available Online from 28 October 2025

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