Proposal and multicriteria optimization of an integrated energy system powered by solar energy and electrolysis to produce hydrogen, utilizing an organic flash combined power/cooling cycle with dual ejectors

Zahra Mohammadi, Shayan Rahimi, Mohsen Fallah, Hadi Siyahi and Mehdi Siyahi

Energy, 2025, vol. 315, issue C

Abstract: This paper proposes an innovative energy system. It has an organic flash combined electricity and cooling cycle with two ejectors instead of two throttle valves to provide power and cooling at the same time, a parabolic trough solar collector (PTSC) field to collect energy from the sun, and a proton exchange membrane (PEM) electrolyzer to make hydrogen. To gain a deeper understanding of the system performance, the combined renewable energy system is thoroughly modeled, and the impact of several critical parameters on exergy efficiency and economic indicators is examined using a parametric analysis. To model the system and get the intended findings, an engineering equation solver, or EES, is utilized. A two-objective genetic algorithm in MATLAB is built and used to find the system's ideal operating conditions in order to optimize it. The results of two-objective optimization show that the final optimal point, which balances exergy efficiency and total cost, has the highest exergy efficiency of 13.37 % and an overall cost of 32.22 $/GJ. Under well-balanced working conditions, the system would produce 22.5 kg/day of hydrogen. The exergy study advises improvements in this component's performance because the PTSC has the highest rate of exercise destruction when compared to other system components. Ultimately, the economic findings show that the turbine, evaporator, PEM electrolyzer, and PTSC, respectively, have the highest exergoeconomic factor.

Keywords: Solar energy; Hydrogen; Electrolyzer; Ejector; Optimization (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:315:y:2025:i:c:s0360544224041070

DOI: 10.1016/j.energy.2024.134329

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