This report presents a detailed analysis of how curved PV roofs can affect the uniformity of solar irradiance and temperature, thereby impacting energy collection on vehicle-integrated photovoltaic systems (VIPV).
Key Findings:
- Specific and Curved PV Roof: The research utilizes a matrix approach for irradiance and temperature monitoring on curved PV surfaces, providing a precise and detailed analysis of energy collection dynamics.
- Energy Loss Due to Curvature: Curved PV roofs for VIPV trigger irradiance and temperature non-uniformity, resulting in energy losses of 17% on sunny days and 6% on rainy days compared to a flat PV surface. These observations were made during the August period in Chambéry, France.
- Optimizing VIPV Energy Collection: To mitigate the effects of curvature-induced losses, the report suggests increasing the number of Maximum Power Point Tracking (MPPT) channels on curved PV surfaces with dedicated string of PV cells. This solution, however, may lead to potential cost issues. An alternative could be considering flat or almost flat PV surfaces to naturally optimize energy collection, though this could impact the vehicle’s aesthetic design.
Research Methodology: The study employed an experimental setup that included a 5×5 matrix of solar cells and temperature sensors on a vehicle roof. This innovative approach not only pinpointed the challenges posed by curved surfaces but also charted potential improvements for enhancing the efficiency of VIPV systems.
Future Implications: The insights provided by this report are vital for advancing photovoltaic technology in transport applications, crucial for reducing carbon emissions in the transport sector and enhancing PV market expansions.
