Study on the effect of anti-reflection film on the spectral performance of the spectral splitting covering applied to greenhouse

Qianlei Ma, Yi Zhang, Gang Wu, Qichang Yang, Wei Wang, Xinge Chen and Yaning Ji

Energy, 2023, vol. 272, issue C

Abstract: Based on the compound parabolic concentrator, the spectral splitting covering (SSC) for greenhouse roof is proposed, which realize the integration of photovoltaic and photosynthesis. However, the indoor radiation is reduced due to its complex structure and opaque photovoltaic cells. Anti-reflection film (AR) is considered as an effective measure to improve the transmittance. In this research, the numerical model of the interface incident angle is established by analyzing the light path variation. Based on this model, the AR design suitable for SSC is proposed. The optical performance of AR on SSC is evaluated by simulation and experiments. Results show that AR is conducive to improve the spectral transmittance, and the increasing trend is high at noon and low in the morning and evening. The whole-day average transmittance of SSC coated with AR to the incident light with wavelength of 450 nm and 660 nm were 57.6% and 61.5%, respectively. The daily average of the defined crop growth factor was 56.86%, which proved that AR can help to transmit more active radiation for photosynthesis. This research provides a theoretical reference for the optical path analysis of trough concentrating structure and the design of broadband and omnidirectional AR in greenhouse covering.

Keywords: Greenhouse; Anti-reflection film; Spectral splitting covering; Photosynthetically active radiation; Spectral transmittance; Light path (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:272:y:2023:i:c:s0360544223004681

DOI: 10.1016/j.energy.2023.127074

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