/solarbytes/media/media_files/2025/01/23/aE2NTmxJFJUERudIdVmC.jpg)
Passive cooling in the airflow PV shading system prevents efficiency drops while reducing building energy demands. Photograph: (Science Direct)
Researchers from Nagoya University have developed an innovative airflow-type photovoltaic-integrated shading device (PVSD) designed for building façades. This system combines ventilated louvers with PV panels, enabling passive cooling and improving solar energy generation efficiency without additional energy consumption. The PVSD has openings at the top and bottom to allow airflow, reducing panel overheating and maintaining performance during cooling periods. In heating periods, the device has utilized indoor air warmed by the panels for room heating. Simulations and numerical analyses have demonstrated higher daily electricity generation and lower annual energy consumption compared to non-airflow systems. Installation angle has a significant impact on energy performance, while changes in opening area and height have minimal effects. This study provides valuable insights into optimizing PVSD applications in building design.