[China Glass Net] The so-called double-layer glass is to replace the single-piece glass on the traditional door and window with two pieces of glass. Since the air layer between the two pieces of glass is not sealed with an effective sealing material, a large amount of dust is caused. Water vapor is very easy to enter between two pieces of glass, so double glazing is a restricted product in the building.
High-rise building glass curtain walls are generally made of insulating glass, which is a thinner, easier-to-heat-transfer material in the exterior walls of buildings. Insulating glass Because the desiccant in the aluminum frame passes through the gap above the aluminum frame to keep the air inside the glass hollow dry for a long time, the temperature insulation performance is excellent.
Highly soundproofed: Insulating glass can reduce noise by 27-40 decibels, and 80 dB of traffic noise outside is indoors, only 50 decibels.
Eliminate frost: The temperature difference between indoor and outdoor is too large, and the single layer of glass will frost. In the case of insulating glass, the inner glass that is in contact with the indoor air is affected by the air barrier, and even if the outer layer contact is low, condensation on the glass surface is not caused by the temperature difference. Insulating glass dew point up to -70 ° C (without strip of insulating glass)
The wind pressure resistance is improved: the curtain wall is mainly subjected to wind load, and the wind pressure resistance becomes the main indicator of the curtain wall. The wind-resistant strength of the insulating glass is 15 times that of a single piece of glass. The double glazing is a two-story glazing with a gap in the middle. Double-glazed windows are used in many places in the north, and double-glazed windows must be used in some cities. The double-layered window is much warmer than a single-glazed window. The air between the two layers of glass can be regarded as non-flowing, so the heat conduction between the indoor and the outdoor is through the process of glass, air, glass, but the single layer is the heat conduction between the indoor and outdoor through a layer of glass. Natural heat is lost more than the former. Therefore, although the process of double glazing (non-insulating glass) is more complicated, its effect is considerable! Its energy saving effect is 1/2 of a single-glazed window.
Buildings lose a lot of heat from the windows during the winter. According to US statistics, the energy lost by buildings through windows accounts for about 30% of the building's energy consumption. In Sweden, the proportion is even larger, about 70%. China's statistics show that it accounts for about 50%. Practices at home and abroad have proved that improving the insulation performance of building envelopes, especially improving the insulation performance of windows, is a more economical and effective method to prevent heat loss from buildings. The application of insulating glass with strong sealing performance plays a key role in the construction. According to US data, the high-rise office building uses silver-gray insulating glass windows to consume 5,494 KJ per square foot of heating per year, which is about 2/3 less than that of single-glazed windows. The annual heating energy consumption per square foot of single-glazed windows is 17,775 KJ. )
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