We know that low-e glass has better thermal insulation effect and good light transmission than ordinary glass and traditional coated glass for construction. To meet people’s high requirements for the quality of life, is commonly used architectural glass, but in practical applications, low-e glass there are many categories, respectively have different functions, which specific let us understand it.
Classification of LOW-E glass
一、 different classification according to the number of functional layers
Defined by the number of functional layers on its surface, the silver layer, the increase of the silver layer will reduce solar radiation and effectively heat insulation. Can be divided into single silver Low-E coated glass, double silver Low-E coated glass, three silver Low-E coated glass.
(1) Single silver Low-E coated glass
Usually contains only one functional layer (silver layer), plus other metal and compound layers, the total membrane layer up to 5 layers.
(2)Double silver Low-E coated glass has two functional layers (silver layer), plus other metal and compound layers, the total film layer reaches 9 layers. However, the technical process control of double silver Low-E glass is much more difficult than that of single silver.
① Comparison between single silver LOW-E glass and double silver LOW-E glass
Any coated glass will limit the transmission of visible light to varying degrees while limiting the transmission of solar thermal radiation. Double silver low-e glass can block more solar heat radiation than single silver low-e glass. In other words, in the case of the same light transmittance, double silver low-e has a lower shading factor Sc, which can filter sunlight into a cold light source to a greater extent.
The heat transfer coefficient of double-silver low-e glass is lower than that of single silver Low-E, which can further improve the thermal insulation performance of the external window and can achieve warm winter and cool summer. In simple terms, because the double-silver low-e glass greatly reduces the heat exchange of the indoor and outdoor environment through the glass, when the air conditioner is heated or cooled, the air conditioner can be in a standby state for a longer time after the indoor temperature reaches the set temperature, thereby saving power consumption.
(3) Three silver Low-E coated glass
It usually has three functional layers (silver layer), plus other metal and compound layers, and the total film layer reaches more than 13 layers.
二、according to the different classification of light transmittance
It can be divided into high permeability, medium permeability and low permeability.
(1) High transmittance: transmittance of more than 70%, can allow a large number of visible light into the room;
(2) Medium transmittance: light transmittance of 50%-70%, has a strong blocking effect on visible light;
(3) Low transmittance: light transmittance of less than 50%, has a strong blocking effect on visible light.
LOW-E glass application case
Beijing Sub-Central Library
The Dubai ME Hotel in the Opus complex
Shanghai World Financial Center
Beijing Lize SOHO
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Post time: Jun-16-2023