Energy and Exergy Analysis of a Geothermal Sourced Multigeneration System for Sustainable City

Sheikh Muhammad Ali Haider, Tahir Abdul Hussain Ratlamwala, Khurram Kamal, Fahad Alqahtani (), Mohammed Alkahtani, Emad Mohammad and Moath Alatefi
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Sheikh Muhammad Ali Haider: National University of Sciences and Technology, Islamabad 44000, Pakistan
Tahir Abdul Hussain Ratlamwala: National University of Sciences and Technology, Islamabad 44000, Pakistan
Khurram Kamal: National University of Sciences and Technology, Islamabad 44000, Pakistan
Fahad Alqahtani: Industrial Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
Mohammed Alkahtani: Industrial Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
Emad Mohammad: Electrical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
Moath Alatefi: Industrial Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia

Energies, 2023, vol. 16, issue 4, 1-19

Abstract: The issue of depleting fossil fuels has emphasized the use of renewable energy. Multigeneration systems fueled by renewables such as geothermal, biomass, solar, etc., have proven to be cutting-edge technologies for the production of different valuable by-products. This study proposes a multigeneration system using a geothermal source of energy. The main outputs include power, space heating, cooling, fresh and hot water, dry air, and hydrogen. The system includes a regenerative Rankine cycle, a double effect absorption cycle and a double flash desalination cycle. A significant amount of electrical power, hydrogen and fresh water is generated, which can be used for commercial or domestic purposes. The power output is 103 MW. The thermal efficiency is 24.42%, while energetic and exergetic efficiencies are 54.22% and 38.96%, respectively. The COP en is found to be 1.836, and the COP ex is found to be 1.678. The hydrogen and fresh water are produced at a rate of 0.1266 kg/s and 37.6 kg/s, respectively.

Keywords: multigeneration system; geothermal; hydrogen; power; renewable (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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