Статья

Biogas–geothermal heat integration with post-combustion CO2 capture for power generation, multi-level cooling, and desalination: Exergoeconomic–environmental assessment and optimization

Imran Ali ChaudhryDepartment of Industrial Engineering, College of Engineering, University of Ha’il, Ha’il, Saudi ArabiaAli BasemAdvanced Technical College, University of Warith Al-Anbiyaa, Karbala, IraqNaglaa F. SolimanDepartment of Information Technology, College of Computer and Information Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi ArabiaPradeep SinghAbdul KhaliqDepartment of Mechanical Engineering, College of Engineering, University of Ha’il, Saudi ArabiaMahidzal DahariDepartment of Electrical Engineering, Faculty of Engineering, Universiti Malaya, 50603 Kuala Lumpur, MalaysiaBatirbek SamandarovMamun University, Bolkhovuz Street 2, Khiva 220900, UzbekistanSania IbragimovaNational Research University TIIAME, Kori Niyoziy 39, Tashkent 100000, UzbekistanKodirbek MakharovKimyo International University in Tashkent, Shota Rustaveli Str. 156, Tashkent 100121, UzbekistanIbrahim MahariqDepartment of Medical Research, China Medical University Hospital, China Medical University, Taichung, TaiwanYasser FouadDepartment of Applied Mechanical Engineering, College of Applied Engineering, Muzahimiyah Branch, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia

2026en

ABI

Аннотация

Addressing the interconnected challenges of energy supply, freshwater scarcity, and greenhouse gas emissions requires efficient multigeneration systems. This study proposes a biogas–geothermal energy system with post-combustion CO 2 capture for the simultaneous production of electricity, multi-level cooling, and desalinated water. The configuration integrates a biogas-fired combustion unit, an organic Rankine cycle, a supercritical CO 2 combined cooling and power cycle, a multi-effect desalination unit, and an amine-based CO 2 capture process. A comprehensive thermodynamic, exergoeconomic, and environmental assessment is conducted. The results show that the combustion and organic Rankine subsystems account for more than 67.35% of total exergy destruction, whereas the desalination unit contributes only 1.1%. Increasing the sCO 2 turbine inlet pressure from 18 to 22 MPa enhances power output by approximately 8.47%, while increasing the extraction ratio substantially reduces electrical generation with minimal effect on cooling capacity. In the CO 2 capture subsystem, reducing the lean/rich heat exchanger temperature difference lowers the reboiler heat duty from 3.38 to 2.77 MJ/kg-CO 2 , confirming the importance of effective internal heat recovery. To balance exergy efficiency, LCOE, and cooling production, artificial neural network surrogate models are coupled with a multi-objective particle swarm optimization algorithm. The optimal case achieves an exergy efficiency of 28.06%, an LCOE of 10.96 cents/kWh, and a cooling production rate of 1178.02 kW. Economic analysis indicates payback periods as short as 3.16 years and an NPV of up to $42.35 million under favorable market conditions. Overall, the proposed configuration represents a promising and economically viable pathway for advancing low-carbon multigeneration systems integrating energy, cooling, water production, and carbon management.

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Идентификаторы

DOI: 10.1016/j.tsep.2026.104757

Цитирования и источники

Цитирований: 1 Использованных источников: 72