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New Energy-saving Glass Will Be Popular In The Future Glass Industry

- Oct 28, 2018 -

 

With the development of building energy-saving policy, the standard of building standardization management and the technological level of glass industry, energy-saving glass, safety glass and environmental glass will surely shine brilliantly in future buildings, and play an increasingly important role.

Low radiation glass and multi-functional coated glass, also known as insulation glass, have the largest sunlight transmittance and the smallest reflection coefficient. It can let 80% of the visible light into the room to be absorbed by objects, and can keep more than 90% of the long wave radiated by indoor objects in the room, greatly improving the energy utilization. At the same time, solar energy can be selectively transferred, most of the heat radiation energy into the indoor, in heating buildings can play a role of heat preservation and energy saving. Compared with ile glass, IMF glass has the same principle in heat conduction control, but is superior in reducing heat input. In addition, low-radiation glass and multi-functional glass have selectivity for different spectrum of sunlight transmission, can take account of ultraviolet radiation, to avoid indoor furniture, pictures, art and other fading due to ultraviolet radiation, but also absorb part of the visible light, play a role in anti-dazzle.

There is also a kind of coated glass which can prevent solar radiation and outdoor thermal radiation in summer. In winter, it is mainly used to block indoor thermal radiation. On the basis of low-radiation glass performance, the performance of heat-reflecting glass is considered. On the premise of retaining the original low-radiation film, the thickness of other coatings can be reduced by changing the thickness of other coatings. The transmittance of sunlight, especially near infrared ray, increases the reflection and absorption of sunlight with low emissivity and low shading coefficient.

The above energy-saving glass has its own thermal advantages and disadvantages. When using, we must optimize the selection according to the geographical, climatic characteristics, building orientation, level of economic consumption and local conditions. For example, high-rise buildings or buildings with abundant sunlight radiation should choose heat-absorbing glass to give full play to the heat insulation function of glass, but also do not have much impact on indoor light; cold and cold climate areas should choose low-radiation glass and multi-functional coated glass, in order to give full play to the function of glass insulation, reduce the impact of indoor light. Low indoor heating load; In warm winter and hot summer areas, it is advisable to choose anti-radiation glass to give full play to the advantages of glass insulation function and reduce the summer indoor air-conditioning load.

For example, the use of heat-absorbing glass in the orientation and location of buildings with low-rise or non-sunshine not only has no obvious effect on heat insulation, but also affects indoor light and increases lighting costs; the use of anti-radiation glass in cold and cold climates can not effectively use solar energy, but also increase heating costs in warm winter and hot summer areas. Choosing low radiation glass and multi-functional coated glass will increase the indoor temperature and the air conditioning cost. At the same time, although coated glass has certain energy saving effect, it exists in the form of insulating glass.

The combination of endothermic glass or anti radiation glass with low radiation glass is the best match. Solar radiation is absorbed into heat energy by the absorbed glass, and its radiation strikes into long-wave radiation. Long-wave radiation is reflected and isolated by low-radiation glass and can not enter the room. In the hot area of South China, the outer glass of the hollow glass is coated with heat reflective film and the inner glass is coated with low radiative film, which not only reflects the solar radiation heat radiated from the glass, but also weakens the heat transfer capability of the hollow glass obviously. It is very significant to improve the indoor thermal environment and reduce the air conditioning load. Use.

It should be noted that the above energy-saving glass is much more expensive than ordinary glass. Hollow glass per square meter increased by about 40-80 yuan, vacuum glass per square meter increased by about 200-400 yuan, hollow coated glass per square meter increased by about 100-300 yuan. But the energy saving effect of energy saving glass is very significant and the price performance ratio is high. When choosing, we should fully consider the long-term use of energy-saving economic results, not because of price factors, lose one thing or the other. The energy saving effects of different structural glass are also different.

In recent years, with the development of multi-storey and high-rise buildings and the strengthening of standardized building management, the safety performance of glass has begun to be highly valued by the state.

In 1998, the State Development and Reform Commission, the Ministry of Construction, the State Administration of Quality Supervision, Inspection and Quarantine and the State Administration for Industry and Commerce jointly issued a circular of the Regulations on the Administration of Building Safety Glass. It is clearly pointed out that buildings need to use glass as the 11 part of building materials, and safety glass must be used. Including 7 stories and above the building's external windows, the area of more than 1.5 square meters of window glass or glass from the bottom of the final decoration surface less than 500 mm of floor windows.

Safety glass mainly refers to toughened glass, laminated glass and other glass products, such as safety hollow glass, which meet the current national standards. Monolithic semi - tempered glass and single medium filament glass are not part of the safety glass category. Notice from the production, inspection, use of safety glass and architectural design, management, construction, supervision, acceptance and other links put forward a series of specific specifications and measures.

With the development of building energy-saving policy, the standard of building standardization management and the technological level of glass industry, energy-saving glass, safety glass and environmental glass will surely shine brilliantly in future buildings, and play an increasingly important role.