Focus on energy-saving new glass

Glass is an important building material. With the continuous improvement of building decoration requirements, the use of glass in the construction industry is also increasing. However, when people choose the building door and window glass, in addition to considering their aesthetic and appearance characteristics, they pay more attention to issues such as heat control, cooling cost, and comfortable balance of internal sunlight projection.

Regarding the energy consumption of building doors and windows, it was vividly compared: the energy consumption of each non-energy-saving window is equivalent to a long watt-hour lamp with a few tens of watts, and it consumes energy for many years. In this era of increasing energy-saving and energy-reducing requirements, heat loss of external door and window glass is a major part of building energy consumption. Therefore, the use of new glass that can effectively reduce energy consumption can greatly reduce the consumption of heating and cooling. Fuel, thereby reducing carbon emissions.

Coated glass Low-E glass, also known as low-e glass, is a film-based product made of a multilayer metal or other compound on the glass surface. The coating layer has the characteristics of high visible light transmission and high reflection to mid- and far-infrared rays, so that it has excellent heat insulation effect and good light transmittance compared with ordinary glass and conventional coated glass for construction. The emissivity of ordinary float glass is as high as 0.84. When coated with a silver-based low-radiation film, the emissivity can be reduced to 0.15 or less.

The use of Low-E glass for building doors and windows of buildings can greatly reduce the transmission of indoor thermal energy to the outside and achieve an ideal energy-saving effect. Low-E glass has a high transmittance to visible light in the sunlight, which can reach more than 80%, and the reflectance is very low, which makes its optical performance greatly improved compared with the traditional coated glass, and can create more For a soft, comfortable light environment.

Vacuum glass vacuum glass is a new type of product. It is partitioned by appropriately distributed particle pillars. The gap layer is only 0.1-0.2 mm. Vacuum is used in the cavity and there is no gas. The vacuum degree reaches 0.1 Pa or more. As a new generation of energy-saving glass, it has better thermal insulation and thermal insulation properties. Its thermal insulation performance is four times that of a single piece of ordinary glass; due to the high thermal resistance of the vacuum glass, it has better anti-condensation and frost performance, which is extremely beneficial to the winter lighting in severe cold regions. The thinnest vacuum glass is only 6mm. Existing residential window frames can be installed intact, and the material of window frames can be reduced, and the weight of windows and buildings can be reduced. However, the cost of vacuum glass is still relatively high.

In order to solve the different requirements for glass insulation performance in different climatic regions and different seasons, the United States began to study “smart glass”. This “smart glass” using electrochromic principle work has been put into production after long-term experimental research. Let glass enter the smart age.

Electrochromic glass is a new type of functional glass. This device consisting of a base glass and an electrochromic system utilizes the adjustability of the light transmission (or absorption) properties caused by the electrochromic material under the action of an electric field, and can achieve the purpose of adjusting the illuminance by the person's wishes. At the same time, Electrochromic systems can reduce the amount of energy that must be expended for buildings to stay cool during the summer and remain warm during the winter by selectively absorbing or reflecting ambient heat radiation and preventing internal heat diffusion.