OPTICAL CHARACTERISATION OF SEMI-TRANSPARENT PV MODULES FOR BUILDING INTEGRATION

摘要

A complete characterisation of PV modules for building integration (BIPV) is needed in order to know their influence on the building's global energy balance. In the case of transparent building envelopes it is particularly important to perform an optical and thermal characterization of the PV modules that would be integrated in them. This paper addresses the optical characterization of some commercial thin-film PV modules based on amorphous silicon (a-Si) technology having different degrees of transparency, suitable for building integration in facades. The approach is based on the measurement of the spectral UV/Vis/NIR reflectance and transmittance of the different considered samples, both at normal incidence and as a function of the angle of incidence. With the obtained results, the total and zoned UV, visible and NIR transmission and reflection, and some other characteristic parameters, have been calculated, enabling a more precise characterization of the PV modules integrated in facades and the subsequent evaluation of their impact over the electrical, thermal and lighting performance in a building.