Title: Energy and exergy analysis of two solar-geothermal assisted biomass-driven hybrid cycles to produce power, heat, and distilled water

Authors: Maliheh Pashapour

Addresses: Department of Mechanical Engineering, Naghadeh Branch, Islamic Azad University, Naghadeh, Iran

Abstract: In this article, the solar and geothermal energies strengthen the proposed cycles A and B. The base of both is the biomass-driven gas turbine-organic Rankine combined cycle. A solar cycle with flat plate collectors preheats the ORC. The system B also has a geothermal cycle, which reheats the ORC, makes water steam, and runs a steam turbine. So, the system B produces 2,179 kW and 8.541 kg/s more power and water vapour, respectively. A reverse osmosis purification unit is attached to the end of each system. The required power of high-pressure pump is respectively supplied by the organic turbine and steam turbine in systems A and B which leads to the production of 35.83 kg/s and 83.09 kg/s distilled water by them. Overall, the energy and exergy efficiencies, and the exergy destruction of the system B is 111.3%, 49.32%, and 23.73% higher than system A, respectively.

Keywords: energy; exergy; biomass-driven gas turbine; geothermal assisted hybrid cycle; flat plate solar collector; reverse osmosis.

DOI: 10.1504/IJEX.2024.136451

International Journal of Exergy, 2024 Vol.43 No.1, pp.40 - 58

Received: 08 Sep 2023
Accepted: 17 Dec 2023

Published online: 01 Feb 2024 *

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