Novel BIPV concept integrates louvers to enhance power production
Researchers from Japan’s Nagoya University have proposed a novel building-integrated photovoltaic (BIPV) system that integrates an airflow-type PV-integrated shading device (PVSD) with ventilated louvers. “The novelty of our research lies in the development of an innovative device that not only generates electricity, but also enhances energy efficiency by utilizing passive cooling and heat recovery mechanisms,” corresponding author Dr. Sihwan Lee told PV magazine.
The system enables passive cooling and heat recovery without extra energy input. “An airflow-type PVSD is a façade system designed with openings at the top and bottom of the louvers, allowing air to pass through.” the team explained. “During the cooling period, outside air was introduced at the bottom of the louvers to facilitate the passive cooling of the solar panels. As the outside air rose through the louvers, it passively cooled the solar panels and subsequently exited at the top of the louvers. During the heating period, indoor air was introduced at the bottom of the louvers and warmed via heat exchange with the solar panels. Warmed air was supplied to the room from the top of the louvers.”
Image: Nagoya University, Applied Energy, CC BY 4.0
The prototype of the system consists of a 200 mm × 1,500 mm solar PV panel installed in front of seven aluminum solar-shading louvers. The solar panel, which uses monocrystalline cells, has a rated output of 39 W and an efficiency of 13%. Opening holes allows air passage to the system. A second prototype included all of the above characterizations but had no air flow opening holes.
Image: Nagoya University, Applied Energy, CC BY 4.0
The performance of the system was measured on a January day in 2022 in Shizuoka City.
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