Angular loss of window integrated thin film semi-transparent photovoltaic module

When photovoltaic modules are installed in the static window or facade, the solar radiation hardly falls perpendicularly on it. The deviation of radiation from perpendicular incidence incurred an additional loss of energy in photovoltaic systems known as an angular loss. This paper presents an assessment of the angular loss for the semi-transparent photovoltaic (STPV) module used in a vertical window system. All four geographical orientations have been considered in the analysis. Evaluation of angular loss with module transparency is one of the prime objective and contribution of this research. The analysis has been carried out using measured module characteristics and 'EnergyPlus' simulation software. In the study, the angular loss has found to be as high as 8.7% in the considered latitude. The analysis indicates that the angular loss becomes prominent for an angle of incidence (AOI) above 70 degrees. With STPV module transparency, the angular loss has been found to vary by around 25%.

Automated summary

This study assessed the angular loss of a semi-transparent photovoltaic module used in a vertical window system, finding that angular loss can be as high as 8.7% at the considered latitude and becomes prominent for an angle of incidence above 70 degrees. It was also discovered that with STPV module transparency, the angular loss can vary by around 25%.