What is the difference between light transmission and solar factor?

Light transmission, on the other hand, represents the amount of light that the glass of a fixture allows to filter inside. The solar factor is a determining parameter in the design of a building, especially when the environments have large transparent surfaces, as it is able to quantify the heat that enters the internal environments.

What is solar infra-red transmittance?

The solar a.nd infra-red transmittance can be used to develop a thermal balance equation for a collector operating at a given solar flux input and fluid inlet and outlet operating temperatures.

What is the difference between visible transmittance and visible reflectance?

Visible transmittance (τv) and visible reflectance (ρv) refer to the ratio of the beam of visible light vertically incident on a glass surface to the incident beam of transmitted light or reflected light.

Which sun protection devices can be installed in parallel with glazing?

The method is applicable to any type of sun protection devices in parallel with glazing, such as shutters or blinds. Sun protection devices can be installed inside a protected room, outside or in a gap between double glazing. The method is applicable in cases when total solar transmittance through glazing ranges between 0.15 and 0.85.

How do you calculate solar factor for insulating glass?

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.

What is the unit of measurement for thermal transmittance?

The unit of measurement for thermal transmittance is W/m 2 K, Watts per square meter per Kelvin. The light transmittance (TL) expresses the amount of light transmitted through the glass. It is the percentage of light, visible to our eyes, that the glass of a fixture allows to filter into the internal environment.