摘要
CuInGaSe 2 (CIGS) solar tiles have become popular building integrated photovoltaic (BIPV) representatives. Their thermal management can be facilitated using robust numerical models and appropriate macroscale boundary conditions. One key condition is the absorbed solar heat; however, it is mainly determined by the thermal radiative properties (absorptance, reflectance, and transmittance) of nanoscale CIGS films. The objectives of this study are thus to develop cross-scale thermal models for CIGS solar tiles operating in different seasons. Radiative properties of the tiles were obtained using the ray tracing method and verified optical constants of each involved material. The verification was conducted using spectra of five samples. The heat generation under different irradiations served as inputs to thermal models constructed based on the finite element method. The temperature distribution of tiles and building roofs was numerically acquired, and it exhibited consistency with experimental results. The run charts of temperature over a long period from modeling also agreed well with counterparts from measurements.