Iranian Research Organization for Science and Technology (IROST) Hydrogen, Fuel Cell & Energy Storage 2980-8537 Articles in Press 2025 12 08 4E analysis of a geothermal-based multigeneration system 1614 10.22104/hfe.2025.7613.1359 EN Hanaa Kadhim Kareem Alsabahi Mechanical Engineering Department, Urmia University, Iran Majid Abbasalizadeh Mechanical Engineering Department, Urmia University, Iran 0000-0002-5269-0037 Ata Chitsaz Mechanical Engineering Department, Urmia University, Iran 0000-0002-4061-001X Morteza Khalilian Mechanical Engineering Department, Urmia University, Iran 0009-0003-1907-3461 Journal Article 2025 05 11 A new geothermal multisource energy system is assessed in this research upon a comprehensive 4E framework of the Energy, Exergy, Economic, and Environmental aspects. The system integrates numerous technologies for energy conversion and use, which includes an Organic Rankine Cycle (ORC) coupled with a Thermoelectric Generator (TEG), a Single-Effect Absorption Chiller (SEAC), a Proton Exchange Membrane (PEM). A distinct benefit of the system is its use of a TEG instead of the usual condenser, allowing waste heat to be converted into extra electricity via the Seebeck effect, thus enhancing the efficiency of energy conversion without using extra power. The multigeneration system is designed to produce electricity, heating, cooling, hydrogen and freshwater which makes it perfect for regions endowed with geothermal resources and various energy demands. The simulation results demonstrating a comprehensive thermodynamic simulation indicate that the system has 66.42% energy efficiency and 77.12% exergy efficiency. Based upon exergoeconomic analysis, the capital and maintenance expenditure is mainly financed by the turbines and also the geothermal unit, with a scope for improvement on the heat exchangers and condensers. In general, activity environment index of the system 0.03206 corresponds to negligible ecological disturbance, and its exergy sustainability coefficient is 0.0711, which points out the possibility of further enhancement of sustainability. This geothermal setup is poised excellently as an efficient, sustainable and multipurpose energy solution as per results.