直接镶嵌式光伏覆层系统仿真及建筑得热分析

Simulation and Thermal Analysis of Direct Mosaic Photovoltaic Cladding System

提出一种新型的基于预制混凝土外墙的光伏组件一体化安装方式。对直接镶嵌式光伏覆层系统沿墙体厚度方向建立物理模型和一维数学模型,模拟其温度分布和估算组件发电量。模拟结果表明:直接镶嵌式光伏覆层系统在正常工作条件下,太阳能电池的温度较高,其四周温度逐渐降低,而在预制混凝土外墙外侧使用保温材料可对墙体起到隔热保温的作用;使用光伏覆层系统不仅不会增加建筑物内空调的制冷负荷,反而能在冬季降低其制热负荷。经研究发现风速对太阳能电池的温度影响较大,但对发电效率影响较小,也进一步证明了非晶硅薄膜电池片对温度的不敏感性。

This paper has proposed a new method to install photovoltaic(Pv)modules on the precast concrete facade.A physical model and a one-dimensional mathematical model of the BIPy facade system have been developed.Temperature distributions and the electrical performance of the system were evaluated respectively.Numerical simulation results show that the temperature at the solar cell is always the highest and gradually drops along both sides of the facade.The BIPV facade system will not contribute to the air conditioning loads due to the insulation layer.Besides,according to the numerical simulation result,it was found that the wind speed had a significant impact on PV cell temperature while little on the power generation efficiency because of the low-temperature coefficient of theprovingthin-film PV module.