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太陽電池板熱真空試驗降溫過程分析

The temperature falling process in solar panel in thermal vacuum test

  • 摘要: 為了得到太陽電池板在熱真空試驗降溫時的正、背面溫差和溫度變化規(guī)律，文章建立了太陽電池板的熱物理模型，根據(jù)太陽電池板厚度、背面發(fā)射率、縱向當(dāng)量導(dǎo)熱系數(shù)、高溫平衡時的正面溫度以及熱沉溫度，推算出電池板在高溫平衡時的背面溫度，進而得出電池板的正、背面溫差；采用集總參數(shù)法進行分析，得出電池板降溫時的降溫時間表達式及電池板溫度與時間的關(guān)系式；經(jīng)過理論計算與試驗數(shù)據(jù)的對照分析表明，降溫時間理論表達式可以近似作為電池板降溫時間的預(yù)測依據(jù)。研究結(jié)果可以為電池板熱真空試驗的熱分析、電池板降溫過程預(yù)測以及低溫控制提供參考。

     

    Abstract: To determine the temperature difference between the front side and the back side of a solar cell panel and the temperature variation during its temperature falling process, this paper employs a thermo-physical model of the solar cell panel in thermal vacuum tests. According to the thickness, the back-emissivity, the equivalent longitudinal conductivity factor of the panel, and its front temperature at a high temperature balance as well as the heat sink temperature, the temperature difference between the panel’s back side and the front-back is obtained. With the lumped parameter method, the expression of the time taken for the panel’s temperature falling and the variation of the temperature against time during cooling are derived, which may be used to predict the time taken for the panel’s temperature falling approximately. The analysis result can be used for the thermal analysis and forecasting the temperature falling process of solar cell panels, and for controlling the low temperature point in thermal vacuum tests.

     

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