BIPV | how to choose the transmittance of photovoltaic glass?

BIPV | how to choose the transmittance of photovoltaic glass?

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Building Integrated Photovoltaics (BIPV) is one of the most effective solutions for building green buildings.

The most common application scenarios of photovoltaic buildings are mainly the photovoltaic roof of the roof and the photovoltaic curtain wall of the facade. While photovoltaic building materials have both the functional attributes of traditional building materials, they also need to meet the building's requirements for daylighting. However, photovoltaic roofs and photovoltaic curtain walls have different requirements for light transmittance.

According to the investigation of multiple photovoltaic construction projects, the light transmittance of photovoltaic power generation glass used in daylighting roofs is generally 20%, and the facade curtain wall generally uses photovoltaic power generation glass with a transmittance of 40%-50%.

Why choose 20% transmittance power generation glass for photovoltaic roof? Can you choose higher transmittance?

After a large number of experience summaries of photovoltaic building roof and photovoltaic solar room project cases, balancing various factors, 20% light transmittance power generation glass is a better choice! On the one hand, because the 20% light transmission effect can already meet the lighting requirements of the owner. In addition, the higher the light transmittance of the photovoltaic power generation glass, the less power generation film in the power generation glass, and the heat absorption and cooling effect of the power generation glass will be reduced. At the same time, the power generation of the power generation glass will also decrease, and the power generation will be reduced accordingly. .

Meanwhile, choosing 40%-50% light transmittance power generation glass for photovoltaic curtain wall can also meet the light transmittance requirements of the building. You can look at the following sets of example photos taken from the outside of the photovoltaic curtain wall:

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2021-03-29

Photovoltaic Building Integration (BIPV) is one of the most effective solutions for building green buildings.

According to the case study of several photovoltaic construction projects, photovoltaic glass transmission for lighting roofs is generally 20%, while facade curtain walls generally use 40%-50% light transmission of photovoltaic glass.

Photovoltaic lighting roof why choose 20% light transmission of the power generation glass, can you choose a higher transmission?

After a large number of photovoltaic building lighting roof and photovoltaic solar housing project case summary, balance a variety of factors, 20% light transmission of power generation glass is a better choice! On the one hand, because 20% light transmission effect has been able to meet the owner's lighting requirements. In addition, the higher the transmission of photovoltaic glass, which means that the less film in the power generation glass, the less heat absorption and cooling effect of the power generation glass, while the power generation glass will also decrease, the power generation will be reduced.