SOLAR RADIATION TRANSMISSION MODEL OF GLASS LAYER WITH ATTACHED DROPLETS

Wang Yanjin; Xiong Jintao; Yang Weibin; He Fangyi; Wang Qian; Lyu Zhihai

doi:10.19912/j.0254-0096.tynxb.2021-1603

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 179-185. DOI: 10.19912/j.0254-0096.tynxb.2021-1603

SOLAR RADIATION TRANSMISSION MODEL OF GLASS LAYER WITH ATTACHED DROPLETS

Wang Yanjin, Xiong Jintao, Yang Weibin, He Fangyi, Wang Qian, Lyu Zhihai

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Abstract

A solar radiation transmission model with droplets attached to the glass layer is proposed based on characteristics of solar radiation transmission between droplets and the glass layer. The incident solar radiation is splitted into the direct radiation and the diffuse radiation parts, and the Monte Carlo ray tracing method is used to calculate the transmittance, reflectance and absorptance of the glass layer with attached droplets. At the same time, the incident angle is divided into sub-angles, and the Monte Carlo ray tracing method is used to calculate the optical performance of the diffuse radiation in each sub-angle. In order to verify the proposed model, the effect of the droplet coverage and the solar incident angle on the optical performance of the glass layer with attached droplets was tested experimentally, and the measured results and the calculated results are compared. The results show that the difference between the experimental results and the calculated results is small. The maximum error of the total transmittance is only about 0.05, and the model has high accuracy. The droplets attached to the glass layer can effectively reduce the solar radiation transmittance, which decreases with the increase of the droplet coverage and the incident angle.

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glass / droplet / solar radiation / Monte Carlo method / building energy consumption

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Wang Yanjin, Xiong Jintao, Yang Weibin, He Fangyi, Wang Qian, Lyu Zhihai. SOLAR RADIATION TRANSMISSION MODEL OF GLASS LAYER WITH ATTACHED DROPLETS[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 179-185 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1603

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