Transmittance and weight of solar panels with different thickness of glass
This isn''t just any regular window glass—it''s the gatekeeper that decides how much sunlight actually reaches the photovoltaic cells. Today, we''re diving deep into how the
Solar Energy Direct Transmittance (Te, %) is the percentage of incident solar energy in the wavelength range of 300 nm to 2500 nm that is directly transmitted by the glass. Solar Direct Reflectance Outdoors/Indoors (Re out/in, %) is the percentage of incident solar energy directly reflected by the glass.
Explanation of terms according to ISO 9050: 2003 and ISO 10292: 1994. Visible Light Transmittance (Tv, %) is the percentage of incident light in the wavelength range of 380 nm to 780 nm that is transmitted by the glass. Visible Light Outdoors/Indoors (Re out/in, %) is the percentage of incident solar energy directly reflected by the glass.
The main values in the choice of glass are thermal transmittance, light transmittance, and the solar factor. The solar factor g is the ratio between the solar energy that manages to pass through the glass entering the environment and the total solar energy that strikes the outer surface of the glazing.
In the case of insulating glass, the solar factor takes into account an additional contribution, q i, from the radiation reflected and transmitted by the double glazing towards the inside. Thus, the solar factor is equal to: g = τe + qi The main values in the choice of glass are thermal transmittance, light transmittance, and the solar factor.
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