UPVC Window Heat transfer coefficient
Plastic doors and windows for the multi-cavity structure, with good thermal insulation properties, the thermal conductivity is very small, only the steel l / 357, aluminum 1/250, visible plastic doors and windows insulation, insulation effect is remarkable, especially for air conditioning Equipment of the modern building is more applicable. Relevant departments to investigate and compare, that is: the use of steel doors and windows than the use of wooden doors and windows of the room in winter indoor temperature can be high 4-5 degrees; the use of double-sided glass in the north region better. According to the Institute of physical testing, single glass, aluminum window heat transfer coefficient of 64W / M2K; single glass steel window heat transfer coefficient is 47W / M2K or so; ordinary double-glass steel, aluminum window heat transfer coefficient Is about 37W / M2K; and double glass plastic steel window heat transfer coefficient of about 25W / M2K. Doors and windows accounted for 30% of the construction area of the outer envelope, the heat accounted for 49%, which shows that plastic windows have a very good energy efficiency.
"Eleventh Five-Year" period, China's annual housing area of nearly 2 billion square meters, more than all developed countries built the sum of the construction area, but a large part of the building is a high energy-consuming buildings. If you do not pay attention to building energy efficiency design and application, will directly exacerbate China's energy crisis. Although the proportion of energy-saving mandatory standards reached 99% at the end of 2013, the implementation rate of energy-saving mandatory standards reached 90%, but in China's more than 400 million square meters of existing buildings, and 90% Above are high energy consumption buildings. In these high-energy buildings, steel doors and windows of the energy consumption accounted for nearly 50% of the ratio. Therefore, the key to building energy efficiency is energy saving windows and doors. The use of new energy-saving doors and windows curtain wall, and the existing building doors and windows curtain wall for energy-saving transformation of China's energy situation is an objective requirement, but also the inevitable trend of market development.
In recent years, affected by the building energy efficiency policies, energy saving and environmental protection of steel doors and windows and curtain wall use ratio is gradually increased. In the policy, driven by aluminum energy-saving windows and doors, glass and steel energy-saving doors and windows, steel doors and windows and a large number of new environmentally friendly energy-saving products continue to emerge. According to incomplete statistics, the current building energy-saving doors and windows around the market share increased rapidly, accounting for 50% of the entire window market.
In the face of China's industrialization and urbanization to accelerate the reality, with high-tech transformation of steel, cement and other traditional heavy chemical industry, optimize the industrial structure, the development of high-tech industries and modern service industry is particularly important. Doors and windows curtain wall is so, in the future development, we not only to "Made in China", should pay attention to "China to create."