Beam splitter roof for solar greenhouse. Free Technical Library News

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Beam splitter roof for solar greenhouse

22.01.2022

Chinese researchers have developed a new type of beam-splitting greenhouse roof that can transmit visible light and convert near-infrared light into electricity.

A team of researchers from the Institute of Agricultural Environment and Sustainable Development of the Chinese Academy of Agricultural Sciences has developed this new greenhouse cover structure based on the use of solar spectrum splitting.

Visible light with a wavelength of 400 nanometers (nm) to 780 nm is critical for triggering the photosynthesis process in greenhouse plants, but near infrared light with a wavelength of 780 to 2500 nm has little effect on plant growth and can cause the greenhouse to overheat.

Tests by the research team have shown that the new solar roof can transmit visible light with an all-day penetration rate of 40%. And at the same time convert the near infrared light into electricity, ensuring the normal growth of greenhouse plants with less cooling consumption.

The electricity generated by the roof with an all-day photovoltaic efficiency of 6,88% can also power the daily operation of the greenhouse.

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