RESEARCH ON TRANSMISSION CHARACTERISTICS OF ACCUMULATED DUST ON SURFACE OF PV MODULES BASED ON EFFECTIVE MEDIUM THEORY

Zhang Juntao; Zhu Shaokang; Wang Shan; Wang Linze; Li Lirong; Gao Dedong

doi:10.19912/j.0254-0096.tynxb.2021-0425

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (10) : 52-58. DOI: 10.19912/j.0254-0096.tynxb.2021-0425

RESEARCH ON TRANSMISSION CHARACTERISTICS OF ACCUMULATED DUST ON SURFACE OF PV MODULES BASED ON EFFECTIVE MEDIUM THEORY

Zhang Juntao, Zhu Shaokang, Wang Shan, Wang Linze, Li Lirong, Gao Dedong

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Abstract

In this paper, the dust samples were collected from the 50 kW multi-function photovoltaic power station at Qinghai University. The elemental analysis of dust samples was tested by using X-ray fluorescence technology, and the refractive index and absorption coefficient of dust samples were calculated in the wavelength range of 0.3-0.7 μm. According to the effective medium theory, the accumulated dust on the surface of PV modules is equivalent to a continuous and uniform medium layer. The absorptance, reflectance and transmittance of the incident light are calculated by analyzing the transmission of solar beam in each layer of the module. The results show that the absorption effect of the accumulated dust is much greater than its reflection effect for incident light, and the reduction of transmission performance of the PV modules is primarily caused by the absorption of the dust to incident light. In the test of the transmittance of the accumulated dust glass, the absolute error value between the measured value and the calculated value is from 0.002 to 0.087, indicating that the model has great practical application value for the PV modules with accumulated dust.

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Zhang Juntao, Zhu Shaokang, Wang Shan, Wang Linze, Li Lirong, Gao Dedong. RESEARCH ON TRANSMISSION CHARACTERISTICS OF ACCUMULATED DUST ON SURFACE OF PV MODULES BASED ON EFFECTIVE MEDIUM THEORY[J]. Acta Energiae Solaris Sinica. 2022, 43(10): 52-58 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0425

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