The energy-saving of architectural Aluminum Windows has entered the era of hollow glass
As one of the four enclosure components of the building energy consumption, the Aluminum Windows is generally the lightweight component of thin wall, which is the weak link of building insulation, heat insulation and sound insulation. Especially in the thermal insulation performance of the worst, it passed through radiative transfer, convection, conduction, and air permeability and so on four kinds of forms leads to building energy loss, ordinary glass of energy loss of construction in winter and summer cooling energy consumption by more than 50%. Therefore, Aluminum Windows is the key to improve indoor heat and light environment, and its performance directly determines the efficiency of building energy conservation. It is an important step to improve the thermal insulation performance of Aluminum Windows and reduce the energy consumption of Aluminum Windows, which is an important step to improve the construction heat, the quality of light environment and the energy saving goal of the building.
The insulation and heat insulation of Aluminum Windows are related to glass and Aluminum Windows frame material, structure and air tightness. The building Aluminum Windows regardless of any form, material should use glass, it occupies window glass area 70% above, so the energy saving of building Aluminum Windows should consider glass first factor first. This is why, in big cities such as Beijing, tianjin and Shanghai have to enact local regulations, vigorously promote and enforce energy-saving building, without exception, and promote the cause of the hollow, inflatable, low radiation glass.
The promotion of hollow glass is the sign of the progress of The Times and the development of energy conservation. Hollow glass is sealed by two or more layers of glass will air layer, layer in the meantime with viscosity coefficient of big and small coefficient of thermal conductivity of inert gas to minimize layer between the convective heat transfer, the main indicators of energy saving features --, heat transfer coefficient K (refers to the steady heat transfer condition, air temperature difference on both sides of glass for 1 ° C, Aluminum Windows the unit time by 1 square meters of insulating glass heat transmission, expressed as a W/m2K. The lower the K value, the better the performance of heat preservation and heat insulation of hollow glass) was 2.7 ~ 3.3, and ordinary single piece of glass is 5.8.
Of course, the insulating glass can be matched with low-e or sun-e glass, and its thermal insulation performance is more outstanding due to its excellent optical thermal characteristics. Hollow glass in developed countries has been widely promoted and applied. The penetration rate in the United States is above 83 percent. The German government has refused to approve the construction of a proposed building without a hollow glass, with a total of 210 million square meters of glass and 52 billion marks for energy savings in the former federal republic of Germany in the 1980s. The penetration rate of European countries has reached 50%.
The Japanese government has stepped up efforts to get its penetration rate up to 50%. South Korea's penetration rate is closer to 90%. In view of the hollow glass production technology already quite mature, practical, Aluminum Windows widely used energy saving effect is obvious, and the investment increase, therefore architectural Aluminum Windows energy saving in the world has entered the era of hollow glass, there is a basis.
The Energy-saving Of Architectural Aluminum Windows Has Entered The Era Of Hollow Glass
- Jul 12, 2017-