Iranian Research Organization for Science and Technology (IROST) Hydrogen, Fuel Cell & Energy Storage 2980-8537 12 4 2025 11 08 Thermoeconomic Study of a Multigeneration System with Waste Heat Recovery from a Gas Turbine 265 274 1591 10.22104/hfe.2025.7167.1323 EN Falah Hasan Mohammed Mohammed Department of Mechanical Engineering, Engineering Faculty, Urmia University, Urmia, Iran Ata Chitsaz Department of Mechanical Engineering, Engineering Faculty, Urmia University, Urmia, Iran 0000-0002-4061-001X Morteza Khalilian Department of Mechanical Engineering, Engineering Faculty, Urmia University, Urmia, Iran 0009-0003-1907-3461 Journal Article 2025 09 16 The growing demand for energy and the associated crisis present a major global challenge. As a result, there is an increasing shift towards the adoption of renewable energy sources. One effective strategy to reduce fossil fuel consumption is to capture heat from the exhaust gases produced by gas turbines. This approach not only reduces fuel consumption but also lowers carbon dioxide emissions, contributing to environmental protection. A study was conducted to evaluate the energy, exergy, and exergoeconomic aspects through a simulation of a combined cycle system, which integrated a steam Rankine cycle (SRC) and an organic Rankine cycle (ORC) to utilize waste heat from gas turbines. Freshwater and hydrogen were produced using a reverse osmosis (RO) unit and a proton exchange membrane (PEM) electrolyzer. The impact of varying system parameters on performance factors was thoroughly investigated. System analysis was conducted using EES software. The results showed that the initial energy efficiency and overall exergy values were 24.92% and 15.01%, respectively, with an output work of 320,412.8 kW. Additionally, replacing the SRC and ORC condensers with two thermoelectric generator (TEG) units resulted in an additional power output of 5,046.8 kW. Exergy destruction rate assessments indicated that the gas turbine (GT) and SRC cycles exhibited the highest levels of exergy destruction. https://hfe.irost.ir/article_1591_5129a5ddcd0dcd755232baa04c231698.pdf