EXPERIMENTAL INVESTIGATION ON SOLAR ABSORPTION PROPERTY AND SURFACE TEMPERATURE OF LIGHT-COLORED COATINGS

Zhang Lei; Li Yuanqi; Yang Liu; Zhu Yiyun; Sang Guochen; Han Qingqing

doi:10.19912/j.0254-0096.tynxb.2024-1872

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (2) : 213-219. DOI: 10.19912/j.0254-0096.tynxb.2024-1872

EXPERIMENTAL INVESTIGATION ON SOLAR ABSORPTION PROPERTY AND SURFACE TEMPERATURE OF LIGHT-COLORED COATINGS

Zhang Lei¹, Li Yuanqi¹, Yang Liu², Zhu Yiyun¹, Sang Guochen¹, Han Qingqing³

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Abstract

The reflection spectra in the ultraviolet, visible and near-infrared bands and the surface temperatures of nine light-colored coatings were tested to explore the influence mechanism of color on the absorption characteristics of solar radiation and clarify the correlation between the absorption characteristics and surface temperature of the coatings. The results show that the difference between the maximum and minimum values of the solar absorption coefficients of the nine coatings is 0.1539. Hue has a significant impact on the waveform of the reflection spectrum curve in the visible band and the reflectance in the near-infrared band. The larger the hue value, the trough of the reflection spectrum curve shifts towards the low wavelength, indicating a stronger absorption on short-waveband radiant energy. Saturation affects the fluctuation amplitude of the spectral curve in the visible band. Coatings with high saturation have a stronger reflection property for radiant energy at the peak and a stronger absorption property for radiant energy at the trough. In addition, the larger the solar radiation absorption coefficient, the higher the surface temperature of the coating. Also, the spectral wavelength characteristics in the visible light band affect the solar radiation absorption of the coating. When the low-reflectivity band of the coating is wider and the solar radiation density in the high-reflectivity band is lower, the surface temperature of the coating is higher.

Key words

solar radiation / absorption spectrum / surface temperature / light-colored coating / solar absorption coefficient

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Zhang Lei, Li Yuanqi, Yang Liu, Zhu Yiyun, Sang Guochen, Han Qingqing. EXPERIMENTAL INVESTIGATION ON SOLAR ABSORPTION PROPERTY AND SURFACE TEMPERATURE OF LIGHT-COLORED COATINGS[J]. Acta Energiae Solaris Sinica. 2026, 47(2): 213-219 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1872

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