The hottest glass energy-saving application of new

2022-10-22
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New technology of glass energy conservation application: glass film

in building energy conservation, building glass doors and windows is a very weak and often overlooked important link, but it is also a place with great potential in building energy conservation. At present, steel windows and aluminum windows equipped with ordinary transparent glass are widely used in many old buildings in China. Even in recent years, ordinary transparent glass is still widely used in new buildings, especially in doors and windows of civil residences

in the long summer in southern China, the sunshine is sufficient, and the temperature is often above 30 ℃. During the day, most of the outdoor solar thermal radiation enters the room through glass doors and windows, raising the room temperature. It is necessary to increase the cooling load to offset the heat. At night, most of the indoor refrigeration energy is lost through the glass doors and windows, which greatly increases the energy consumption. The speed of 50r/min is the direct reason for the high energy consumption of buildings. One of the effective solutions is to adopt new energy-saving glass doors and windows to minimize the transmittance of solar radiation

people may notice that the glass used in architectural doors and windows in China is undergoing a development process from ordinary white glass - darker color heat absorbing glass (commonly known as brown glass) - light green heat absorbing glass and coated glass - light green hollow glass. Because light green glass is cheap and has a certain heat insulation efficiency, it is being widely used in ordinary residential doors and windows, while hollow glass is gradually used in new high-end luxury residential doors and windows because of its good sound insulation and heat insulation performance, but its high price also restricts its popularization and promotion. Moreover, the above-mentioned glasses also have one of the most fatal weaknesses of ordinary glass, that is, they are fragile, that is, the safety performance of glass is low

how can buildings take effective, economic and convenient methods to solve the heat insulation and energy saving of building glass doors and windows and improve their safety performance

multifunctional glass film is a high-tech energy-saving product that can effectively control solar thermal radiation and increase glass strength. It belongs to a new type of energy-saving building materials

this kind of film is a kind of functional glass film with both light transmission and high heat insulation, which is made of special polyester film as the substrate, coated with various high reflectivity metal or metal oxide coatings by magnetron sputtering and other methods in the middle of the polyester film, and then pressed by a special process composite layer. It can transform the cheap ordinary transparent flat glass into safety and heat insulation glass with multiple colors and functions

for example, it can be directly coated on ordinary transparent glass to become like coated glass to form safety heat insulation glass with multiple colors and functions. For example, the ordinary transparent glass can be directly coated with film to become heat-insulating glass like film glass, and the ordinary transparent glass can be turned into safety heat-insulating glass with both heat insulation and safety explosion-proof functions. Colored or colorless transparent safety film can also be pasted on the curtain wall glass, so that the coating layer of coated glass is not easy to oxidize, fade and fall off, and its ability to resist wind pressure and acid-base corrosion is increased. According to the test, 12mm ordinary glass is pasted with two layers of safety bulletproof film, which can prevent the shooting of 79 micro submachine gun without penetration and splash, which shows its reliable impact resistance. The safety glass made of ordinary glass with safety film has reliable safety performance, low price and can greatly reduce the weight of the glass. The explosion-proof glass made of special safety film pasted on the ordinary glass with a certain thickness can effectively resist the shock wave generated by the explosion when encountering the explosion, reduce the direct injury and the injury caused by the splashing of glass fragments, and also reduce the repair cost of the facilities affected by the explosion and the facilities near the explosion center

multifunctional glass film has the following characteristics:

1. High heat insulation and energy saving (heat insulation rate of more than 70%), saving air conditioning power, making indoor warm in winter and cool in summer

2。 The UV barrier rate is not less than 98%, which protects indoor furniture, carpets and other items from fading and aging

3。 It has good light transmittance (5%~87%), ensuring sufficient natural lighting brightness in the room

4。 It is safe to be explosion-proof, resistant to the damage of earthquake and typhoon, and the film is firmly stuck when the glass is broken, so it will not splash and hurt people

5。 It has one-way perspective, and can't see clearly outdoors. It's very clear to see indoors and outdoors

6。 Easy to install, without special tools, without changing glass, easy to clean, without special maintenance

7。 No fading, no foaming, no falling off of the metal layer, and there is an anti scratch protective layer on the film surface

8。 It is economical and practical, with multiple functions, various colors, strong decoration and a service life of more than 7~10 years

9。 It can be used in a wide range of applications, new building installation and a large number of old building door and window reconstruction

10。 It is especially suitable for high-rise buildings and places such as homes, office buildings, hotels, shops, schools, kindergartens, hospitals, villas, curtain wall glass, building skyline glass, planting greenhouses, bank counters, museums, jewelry stores, art galleries, libraries, gymnasiums, money carriers and so on

according to the test of some domestic research departments, ordinary 6mm transparent glass can make 84% of solar radiation penetrate into the room. In some cities and regions in Western China, the radiation flow of solar radiation into the room in summer is about 1. six hundred and seventy-six × 106j/m2 · h, when the 3mm thick ordinary transparent glass is mainly used for external insulation of the wall, internal insulation of the external wall and ground heating glass to meet the national building energy conservation requirements, the transmission of solar heat radiation can be reduced to 82. 5%, so that the heat radiation flow from the window glass into the room in summer is from 1. six hundred and seventy-six × 106j/m2 · h decreases to 0. two hundred and thirty-nine × 106J/m2·h。 Compared with the heat transfer coefficient of windows, the heat transfer coefficient K of single-layer windows is 5. 24W/m2 · K, heat-insulating film is pasted on the inner surface of ordinary glass of single-layer window, and its heat transfer coefficient is 3. 93W/m2 · K, and the heat transfer coefficient can reach 2 by sticking a film on the outside of the inner layer of the ordinary glass of the double-layer window. 04w/m2·k。 Under basic conditions, as a comparative test of the total power consumption of the two air-conditioned rooms for a period of 30 days, when the window areas of the two rooms are the same, the building area of the room with thermal insulation film is 13. 76m2, with power consumption of 563. 35kw/h, while the building area of the room in the control group (without film) was 14. 78m2, with power consumption of 649. 35kw/h, the room covered with film saves 13. 24%。 It can be seen that the heat insulation and energy saving effect is very obvious after the heat insulation film is pasted on the glass of building doors and windows. If the heat insulation film is pasted on the outside of the second glass of the single frame double glass plastic steel window to establish a fire partnership with the customer, the heat insulation and energy saving effect is even more significant

at present, this kind of glass film has been widely used on the bulletproof glass of banks, the ceiling glass of buildings and the glass curtain wall of external walls in China. For example, the head office building of China Construction Bank in Beijing, the Beijing Business Department of many banks such as Agricultural Bank of China and industrial and Commercial Bank of China, the Huilongguan villa area in Beijing, the Danish Embassy in China, the Chinese History Museum, etc. From the use effect of these projects, the use of multi-functional glass film to solve the thermal insulation and safety problems of building glass doors and windows is economical, convenient and practical in line with national conditions. Today we will talk about the problems often occurred in fatigue experiments and one of the effective methods to solve them. Its popularization and application not only saves energy costs for users, but also reduces the damage caused by glass breakage to people, improves the quality of the building thermal environment, and improves the comfort and safety of the room

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