光伏建筑一体化部件的热电耦合分析

Thermoelectric Coupling Analysis of the Building Integrated Photovotage Unit

光伏建筑一体化部件服役过程中组件温度会大幅度升高,使组件中太阳电池的输出特性受到影响导致输出功率下降,直接影响到一体化部件的电性能,因此准确地模拟出组件在服役过程中的温度场分布并计算出此热场下电池的输出功率十分重要。基于等效电路利用隐函数近似解的迭代算法,首先分析不同温度下一体化部件中太阳电池的光电转换效率,然后用有限元分析法模拟部件安装在建筑物屋顶后服役过程中的温度场,再将二者相结合实现部件中单晶硅太阳电池的光电转换效率与工作温度的热电耦合,模拟出部件热电耦合后的温度场,并计算出部件当时的输出功率,为分析光伏建筑一体化部件服役期间的具体热电性能提供理论参考。

The temperature of the building integrated photovotage （BIPV） unit will be greatly increased during servicing, and the output characteristics of the solar cell in the component will be affected, then the output power declines and directly affects the electrical properties. So it is very important that the temperature distribution of the components in service was simuletal auurately and the output power in this thermal field was calculated. Firstly, the photoelectric conversion efficiency of the solar cell under different temperatures was calculated＇using iterative algorithm of the implicit function approximation solution which based on the equivalent circuit. Then, the temperature fii^ld of the unit was simulated by the use of the finite element analysis method when it was installed on the rooftop of the building. After all of that, combining them to realize thermoelectric coupling of the photoelectric conversion efficiency and working temperature. Under such condition, temperature field of the component and output power at that time should be calculated. It could serve as useful markers for analyzing the building integrated photovotage unit under service conditions.