Evaluation and optimization of a novel CPC-PV/T driven cooling, heating and power cogeneration system based on thermochemical energy storage

Yihan Wang, Tingsen Chen, Sheher Yar Khan, Shuli Liu, Yongliang Shen, Yingjuan Shao, Wenjie Ji and Zhiqi Xu

Energy, 2025, vol. 316, issue C

Abstract: This study proposes and evaluates a solar compound parabolic concentrator-photovoltaic/thermal driven cogeneration system, based on thermochemical energy storage. The proposed system efficiently utilizes solar energy and reduces power consumption in industrial zones and buildings located in tropical and subtropical regions. Solar energy is collected, with a portion converted into electricity through photovoltaic conversion to drive an electric compression refrigeration system and stored in batteries for nighttime use. The thermal portion of the solar energy is utilized to operate an absorption refrigeration system and also stored as chemical energy in a reactor. During the daytime, the inlet air temperature is a key parameter to improve system performance suggesting that increasing the inlet air temperature is advisable. The air humidity emerges as a key factor for optimizing system performance during the nighttime. The total energy efficiency reaches 66.46 % during the daytime and 73.79 % in a typical day The CPC and absorber cause significant exergy losses. Economic analysis shows that the initial investment can be recovered in 6.12 years by reducing natural gas consumption while using second-hand batteries significantly reduces the dynamic payback period. In applications in different regions, the proposed system can significantly save primary energy and reduce emissions.

Keywords: Solar photovoltaic photothermal; Compound parabolic concentrator; Refrigeration; Parameters influence analysis; Combined cooling; Heating and power (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:316:y:2025:i:c:s0360544225002683

DOI: 10.1016/j.energy.2025.134626

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