[China Glass Network] Among the existing existing buildings in China, 95% of the buildings belong to high-energy buildings. 40% of the energy consumption is lost through the doors and windows and the lighting walls, so the energy consumption is reduced and our industry is changed. The heavy responsibility of the current situation of high energy consumption falls to the employees of our industry. This issue has also been valued by the government's functional departments. It is also necessary for the whole society to raise awareness of the building, the windows and doors, and the curtain wall energy conservation, especially the owners and developers. And consumers, let us jointly raise awareness of energy conservation, implement the national energy conservation environmental protection policy, and achieve the strategic goal of sustainable development.

The thermal insulation performance of the outer window (including transparent curtain wall and lighting roof) depends mainly on the thermal insulation performance of the glass used, the number of layers of the insulating glass, the distance, the gas in the spacer layer, and the spacers such as warm edge technology. The radiance of the LOW-E hollow glass film layer has an effect on the thermal insulation properties of the glass. The glass can be determined according to the standard heat transfer coefficient limit of different types of external windows (including transparent curtain wall and lighting roof).

The heat transfer coefficient of the external window (including transparent curtain wall and lighting roof) of different materials has a great influence, which cannot be ignored. The heat transfer coefficient of the plastic window frame and wooden window frame is small due to the material itself, and the heat transfer coefficient of the external window. The influence is not great, the thermal conductivity of the aluminum alloy window frame, steel window frame and other materials itself is very large, and the thermal bridge formed by the thermal bridge has a great influence on the heat transfer coefficient of the external window.

There are many kinds of aluminum alloy bridge treatment methods, such as polyamide (PA) heat strip, polyurethane (PU), etc., the outer window (including transparent curtain wall, lighting roof) with high thermal insulation performance should be selected. Aluminium profiles with good bridge breakage.

The ratio of the window frame area to the outer window is about 20-40% depending on the window frame material and the window type series, and the different window frame areas have different effects on the heat transfer coefficient of the window. The construction method of the transparent curtain wall also has different effects on the heat transfer coefficient. The influence of the frame glass curtain wall and the semi-hidden frame glass curtain wall is greater than that of the point-supported curtain wall and the hidden frame curtain wall.

The shading coefficient of the outer window (including the transparent curtain wall and the lighting roof) can be selected according to the shading coefficient of the different glass itself and the external shading to meet the limit requirements. Different shades of glass, heat reflective glass and LOW-E hollow glass film have different shading and optical properties.

At present, the main measures to improve the energy-saving and heat-insulating performance of transparent curtain wall are to use coated glass, LOW-E glass, heat-reflecting glass, insulating glass and heat-insulating bridge aluminum profiles to reduce the structural heat transfer coefficient and eliminate the “thermal bridge” of the structural system. Air infiltration heat loss, reduce the area of ​​the opening sash, improve the sealing and so on.

The thermal insulation principle of the insulated bridge aluminum profile is based on the creation of a continuous insulation zone, which is used to separate the aluminium profile into two sections. Insulation strip "cold bridge" selected material is polyamide nylon 66, its thermal conductivity is 0.3W / (m · K), much smaller than the thermal conductivity of aluminum alloy, and mechanical properties are equivalent to aluminum alloy.

In the late 1970s, aluminum-insulated aluminum profiles were used abroad, mainly for aluminum alloy doors and windows in alpine regions, and used in the late 1980s for framed glass curtain walls in alpine regions. At present, in China, the building with high thermal insulation performance requirements has also begun to use it for bright-frame insulating glass curtain wall, hidden frame insulating glass curtain wall and point supporting insulating glass curtain wall.

In addition, it is worth mentioning that in the energy-saving heat-insulating curtain wall or door and window, if 6+12A+6 insulating glass is used at the same time, the heat transfer coefficient K value is about 3.0W/(m2·K), and the heat transfer coefficient is lower than that of the single-layer glass curtain wall. 1/2, can greatly reduce energy consumption, therefore, in the case of higher insulation performance requirements, such as Jinbo Group 6 + 12A + 6 insulating glass, then the heat transfer coefficient K value of 1.7W / (m2 · K) The heat transfer coefficient is 4/5 lower than that of the single-layer glass curtain wall. If the insulating glass is filled with inert gas, the K value can be reduced to a lower value, and the heat transfer coefficient K reaches 1.5 W/(m2·K). Left and right, the energy saving effect is excellent.

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