A novel non-confocal two-stage dish concentrating photovoltaic/thermal hybrid system utilizing spectral beam splitting technology: Optical and thermal performance investigations

Jinyu Li, Zhengda Yang, Yiya Wang, Qiwei Dong, Shitao Qi, Chenxing Huang, Xinwei Wang and Riyi Lin

Renewable Energy, 2023, vol. 206, issue C, 609-622

Abstract: Concentrating and spectral beam splitting technology towards the efficient utilization of full-spectrum solar energy has been widely concerned. This paper proposes a novel non-confocal two-stage parabolic dish concentrating photovoltaic/thermal (NTPD-CPVT) hybrid system which offers access to the alleviation of photovoltaic heat load and the two-stage heating of heat transfer fluid through a specially developed spectral beam splitter. The thermodynamic and optical properties of the system are analyzed via the comprehensive model including ray tracing, energy flux evaluation and photovoltaic/thermal hybrid energy evaluation. Results indicate that the satisfied spot uniformity and optical efficiency of 80.7% could be obtained by non-confocal optimization, and the NTPD-CPVT hybrid system shows stable overall energy efficiency over 20.9% under different irradiance conditions. Based on the comprehensive comparison, the introduction of a spectral beam splitter promotes the photovoltaic/thermal module efficiency and the system exergy efficiency by 17.6% and 10.2%, and effectively shortens the payback period. Furthermore, the reference values of implemental parameters such as error tolerances and heat transfer coefficients are provided to guarantee the optical and economic performance of the system. The research results support the potential of the NTPD-CPVT hybrid system in improving the cascade use of solar spectrum and guide the construction of future prototypes.

Keywords: Solar energy; Two-stage parabolic dish; Photovoltaic/thermal hybrid system; Spectral beam splitting; Thermodynamic and optical analyses (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:206:y:2023:i:c:p:609-622

DOI: 10.1016/j.renene.2023.02.078

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