Jigar Faria, Shikha Marwaha, M. Sadullah, K. Ghosh
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引用次数: 0
摘要
硅光伏(PV)组件对水分侵入有很高的敏感性。湿气的影响是这样的，它使醋酸乙烯(EVA)层分层，并通过降解太阳能电池接触处的银浆使光伏组件短路。本文利用SHT25温湿度传感器对硅光伏组件中的水分流动进行了实验测定。为了进行分析，提出了三种配置，即带传感器的背板印刷电路板(PCB)- eva玻璃、eva -PCB玻璃和背板- eva -PCB- eva玻璃。所得实验结果与EVA和背板材料扩散系数的解析方程拟合。得到的EVA扩散系数是背板扩散系数的120倍，表明通过EVA扩散是一个瞬时过程。
Experimental Determination of Diffusivity of Backsheet and EVA for Silicon Photovoltaic Modules
Silicon photovoltaic (PV) modules have a high susceptibility to moisture ingression. The impact of moisture is such that it delaminates the ethylene vinyl acetate (EVA) layer and short-circuits the PV modules by degrading the silver paste at the contacts of the solar cells. In this paper, experimental determination of the flow of moisture in silicon PV modules using SHT25 humidity and temperature sensors has been carried out. For analysis, three configurations have been proposed viz. backsheet-printed circuit board with sensor (PCB)- EVA-glass, EVA-PCB-glass, and backsheet-EVA-PCB-EVA-glass. The obtained experimental results were fitted with the analytical equations to determine the diffusivity of both EVA and backsheet materials. The obtained diffusivity of EVA is 120 times that of the backsheet indicating that diffusion through EVA is an instantaneous process.
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