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Low-E glass (ILE) and multi-functional coated glass (IMF), also known as insulating glass, have the largest solar transmittance and the smallest reflection coefficient. 80% of the visible light can be absorbed by the object in the room, and the long wave radiated by more than 90% of indoor objects can be kept in the room, which greatly improves the energy efficiency. At the same time, it can selectively transmit solar energy, transmit most of the heat radiation energy into the room, and play a role in heat preservation and energy saving in heating buildings. Compared with ILE glass, IMF glass has the same principle in heat conduction control, but it is superior in reducing heat energy. In addition, low-emissivity glass and multi-functional glass are selective for the transmission of sunlight of different spectra, and can eliminate ultraviolet rays to prevent fading of indoor furniture, pictures, artwork, etc. due to ultraviolet radiation, and also absorb some visible light, thus preventing the occurrence of visible light. The role of light.
In addition, there is a kind of coated glass that can prevent solar radiation and outdoor heat radiation in the summer, and it mainly acts as a barrier to heat radiation in the room during the winter. It also takes into account the performance of the heat-reflecting glass on the basis of the performance of the low-emissivity glass, keeping the original low. Under the premise of radiation film layer, by changing the thickness of other film layers, the transmittance of sunlight (especially near-infrared rays) should be appropriately reduced, and the reflection and absorption of sunlight (especially near-infrared rays) should be improved, with low emissivity and low shading coefficient. .
Each of the above energy-saving glasses has its own thermal advantages and also has its own shortcomings. When using, it must be based on the geography, climate characteristics, architectural orientation, level and economic consumption level of each region, and optimize selection according to local conditions. For example, the high-rise building or the building direction and location where the sunlight is relatively abundant should select the heat-absorbing glass to give full play to the heat-insulating function of the glass, and it will not cause too much influence on the indoor light. In cold and cold climate regions, low-emissivity glass should be used. With multi-functional coated glass, in order to give full play to the glass insulation function and reduce the indoor heating load; in the areas with warm winter and hot summer, anti-radiation glass should be selected to give full play to the advantages of the thermal insulation of the glass and reduce the indoor air conditioning load in summer. For example, the use of heat-absorbing glass in the building's low-level or low-radiation building orientations and locations will not only result in inefficient heat insulation, but will affect indoor lighting and increase lighting costs. Anti-radiation glass in cold and cold climates cannot be used effectively. Solar energy will also increase heating costs; in the regions with warm winter and hot summer, the selection of low-emissivity glass and multi-functional coated glass will result in an increase in indoor temperature, which will increase the cost of air conditioning. At the same time, although the coated glass has a certain energy-saving effect, it is in the form of hollow glass. The combination of heat-absorbing glass or anti-radiation glass with low-e glass to form an insulating glass is the best match. Solar radiation is absorbed by the heat-absorbing glass and becomes thermal energy. The radiation is turned into long-wave radiation. The long-wave radiation is reflected and isolated by the low-e glass and cannot enter the room. In the hot regions of southern China, the heat reflecting film is coated on the outer glass of the insulating glass, and the low-radiation film on the inner glass can not only reflect the solar radiation heat radiated on the glass, but also the heat transfer ability of the heat transfer glass of the insulating glass is obvious. Weakening has a very significant effect on improving indoor thermal environment and reducing air-conditioning load.
It should be stated that the above energy-saving glass is much more expensive than ordinary monolithic glass. Insulating glass increases about 40 to 80 yuan per square meter, vacuum glass increases about 200 to 400 yuan per square meter, and hollow coated glass increases about 100 to 300 yuan per square meter (because of different film types, performance and thickness, and different). However, the use of energy-saving glass energy-saving effect is very significant, higher cost performance. When choosing, full consideration should be given to the economic effects of energy conservation that are obtained through long-term use. It must not be due to price factors. There are also differences in the energy-saving effects of various structural glass.
In recent years, with the strengthening of multi-storey, high-rise building development and standardized management of buildings, the safety performance of glass has begun to be highly valued by the state.
In 2003, the National Development and Reform Commission, the Ministry of Construction, the General Administration of Quality Supervision, Inspection and Quarantine, and the State Administration for Industry and Commerce jointly issued the "Regulations on the Administration of Architectural Safety Glass". It is clearly stated that safety glass must be used in 11 locations where buildings require glass as a building material. Including the outer windows of the 7-storey and 7-storey buildings, the window glass or glass bottom with an area of ​​more than 1.5 square meters is less than 500mm floor-to-ceiling windows etc.
Safety glass mainly refers to tempered glass, laminated glass, and other glass products processed by tempered glass or laminated glass, such as safety insulating glass, in compliance with current national standards. Monolithic semi-tempered glass (heat-reinforced glass) and monolithic medium Wire glass do not fall into the category of safety glass. The notice proposes a series of specific regulatory requirements and measures from the aspects of production, inspection, use, and architectural design, management, construction, supervision, and acceptance of safety glass.
From the above discussion, it can be seen that with the increase of building energy conservation policies, the standardization of building management standards and the level of science and technology in the glass industry will increase, and energy-saving glass, safety glass, and environmental protection glass will surely shine in the future construction and become more and more important. The effect.
In addition, there is a kind of coated glass that can prevent solar radiation and outdoor heat radiation in the summer, and it mainly acts as a barrier to heat radiation in the room during the winter. It also takes into account the performance of the heat-reflecting glass on the basis of the performance of the low-emissivity glass, keeping the original low. Under the premise of radiation film layer, by changing the thickness of other film layers, the transmittance of sunlight (especially near-infrared rays) should be appropriately reduced, and the reflection and absorption of sunlight (especially near-infrared rays) should be improved, with low emissivity and low shading coefficient. .
Each of the above energy-saving glasses has its own thermal advantages and also has its own shortcomings. When using, it must be based on the geography, climate characteristics, architectural orientation, level and economic consumption level of each region, and optimize selection according to local conditions. For example, the high-rise building or the building direction and location where the sunlight is relatively abundant should select the heat-absorbing glass to give full play to the heat-insulating function of the glass, and it will not cause too much influence on the indoor light. In cold and cold climate regions, low-emissivity glass should be used. With multi-functional coated glass, in order to give full play to the glass insulation function and reduce the indoor heating load; in the areas with warm winter and hot summer, anti-radiation glass should be selected to give full play to the advantages of the thermal insulation of the glass and reduce the indoor air conditioning load in summer. For example, the use of heat-absorbing glass in the building's low-level or low-radiation building orientations and locations will not only result in inefficient heat insulation, but will affect indoor lighting and increase lighting costs. Anti-radiation glass in cold and cold climates cannot be used effectively. Solar energy will also increase heating costs; in the regions with warm winter and hot summer, the selection of low-emissivity glass and multi-functional coated glass will result in an increase in indoor temperature, which will increase the cost of air conditioning. At the same time, although the coated glass has a certain energy-saving effect, it is in the form of hollow glass. The combination of heat-absorbing glass or anti-radiation glass with low-e glass to form an insulating glass is the best match. Solar radiation is absorbed by the heat-absorbing glass and becomes thermal energy. The radiation is turned into long-wave radiation. The long-wave radiation is reflected and isolated by the low-e glass and cannot enter the room. In the hot regions of southern China, the heat reflecting film is coated on the outer glass of the insulating glass, and the low-radiation film on the inner glass can not only reflect the solar radiation heat radiated on the glass, but also the heat transfer ability of the heat transfer glass of the insulating glass is obvious. Weakening has a very significant effect on improving indoor thermal environment and reducing air-conditioning load.
It should be stated that the above energy-saving glass is much more expensive than ordinary monolithic glass. Insulating glass increases about 40 to 80 yuan per square meter, vacuum glass increases about 200 to 400 yuan per square meter, and hollow coated glass increases about 100 to 300 yuan per square meter (because of different film types, performance and thickness, and different). However, the use of energy-saving glass energy-saving effect is very significant, higher cost performance. When choosing, full consideration should be given to the economic effects of energy conservation that are obtained through long-term use. It must not be due to price factors. There are also differences in the energy-saving effects of various structural glass.
In recent years, with the strengthening of multi-storey, high-rise building development and standardized management of buildings, the safety performance of glass has begun to be highly valued by the state.
In 2003, the National Development and Reform Commission, the Ministry of Construction, the General Administration of Quality Supervision, Inspection and Quarantine, and the State Administration for Industry and Commerce jointly issued the "Regulations on the Administration of Architectural Safety Glass". It is clearly stated that safety glass must be used in 11 locations where buildings require glass as a building material. Including the outer windows of the 7-storey and 7-storey buildings, the window glass or glass bottom with an area of ​​more than 1.5 square meters is less than 500mm floor-to-ceiling windows etc.
Safety glass mainly refers to tempered glass, laminated glass, and other glass products processed by tempered glass or laminated glass, such as safety insulating glass, in compliance with current national standards. Monolithic semi-tempered glass (heat-reinforced glass) and monolithic medium Wire glass do not fall into the category of safety glass. The notice proposes a series of specific regulatory requirements and measures from the aspects of production, inspection, use, and architectural design, management, construction, supervision, and acceptance of safety glass.
From the above discussion, it can be seen that with the increase of building energy conservation policies, the standardization of building management standards and the level of science and technology in the glass industry will increase, and energy-saving glass, safety glass, and environmental protection glass will surely shine in the future construction and become more and more important. The effect.
Bar Grating, Expanded Metal Lowes Steel Grating/Steel Grating Fence/Steel Grating Plate, China Bar Grating
Anping County ShunXing Hardware Wire Mesh Co., Ltd. , http://www.shunxing-fence.com