Design and performance evaluation of an innovative solar concentration polygeneration system

Gang Wang, Dongyu Li, Tianlin Zou and Yanfeng Duan

Renewable Energy, 2025, vol. 251, issue C

Abstract: This paper presents an innovative solar concentration polygeneration system with super-critical carbon dioxide (S-CO2) Brayton and organic Rankine cycles. It is developed for generating electric power, freshwater and hydrogen. Operation, exergetic and economic performances of the polygeneration system are evaluated. The evaluation results show that the electric power and S-CO2 Brayton cycle efficiency of the polygeneration system are 50.0 MW and 44.0 %. The hydrogen and freshwater production rates of the polygeneration system are 6.24 kg/h and 393.55 t/h. The linear Fresnel reflector solar loop, S-CO2 Brayton cycle, hydrogen production and freshwater production blocks can coordinatively achieve the effective operation for both short and long terms. The LFR solar field has the largest exergetic loss (97.3 MW) and its exergetic efficiency is 63.8 %. The levelized costs of electricity, freshwater and hydrogen of the polygeneration system are 0.106 $/kWh, 0.98 $/t and 3.51 $/kg, respectively. The net present value is about 478.0 million USD. These results reveal the technical and economic viability of the polygeneration system.

Keywords: Solar energy; Solar polygeneration; Brayton cycle; Freshwater production; Hydrogen production (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:251:y:2025:i:c:s0960148125011036

DOI: 10.1016/j.renene.2025.123441

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