Plastic Doors And Windows Create A New Image Of Building Energy Efficiency

China PVC The geographical distribution of window and door profile production

HC plastic mesh News: At present, urban and rural buildings housing more than 20% annual growth rate, completed in an area of 20 million square meters, of which 40 billion square meters of existing buildings, 95% for the high energy consumption buildings, their windows and doors of the energy consumption in developed countries 3 times 2 times. In the next 30 years, China will build 40 billion square meters of new construction, therefore, Plastic Door and window industry will usher in an unprecedented development opportunity.

Design standard requirements on the doors and windows energy saving targets

Building envelope windows and doors is an important component of the external opening parts of the building, indoor and outdoor housing is the weakest link in the energy barrier. The data indicate that heat loss through windows and doors Energy Building energy consumption accounts for about 28%%, energy consumption, air infiltration through doors and windows building energy consumption accounts for about 27%%, respectively, total building energy consumption accounts for more than 50%. Shows that the key is building energy saving windows and doors.

The nature of energy-saving windows and doors, as much as possible to reduce indoor air with outdoor air through windows and doors of this medium for heat transfer. We know the way the heat transfer conduction, convection and radiation. To reduce heat transfer by heat conduction, the required materials should be used doors and windows with low thermal conductivity material; to reduce the convection heat transfer, requires good sealing doors and windows; to reduce the thermal radiation transfer, the requirements into a window shade with good function. In the design standard, the doors and windows of these properties by heat transfer coefficient, respectively, airtight performance and shading coefficient expressed.

Different regions, different buildings have different design requirements of thermal energy. For the summer and cold winter areas of thermal energy-saving design, the "summer heat and winter cold area design standard" different direction, different outside the area ratio of window to wall windows, providing heat transfer coefficient. "Hot summer and cold winter region residential building energy efficiency design standards" on the South, the North residential buildings outside the windows of the heat transfer coefficient and overall shading coefficient of the provisions.

Airtight performance of windows on the building, "summer and cold winter region residential building design standard for energy efficiency," provides as follows: residential buildings in a layer to 9 layer of air tightness of windows, under pressure at 10Pa, every hour meter of air permeability of gap should not be larger than 2.5 cubic meters per hour per square meter area and air permeability of not greater than 7.5 cubic meters; 10 floors and 10 floors above the air tightness of windows, in the 10Pa pressure Next, the air gap per meter per hour, the amount should not penetrate more than 1.5 cubic meters per hour per square meter area and air permeability of not greater than 4.5 cubic meters. "

"Hot summer and cold winter region residential building design standard for energy efficiency," provides as follows: building a layer 6 layers of windows and balcony doors of the air tightness level, should not be less than the "air permeability of windows divided level and its determination "required grade ; 7 or more layers and 7 layers of windows and balcony doors of the air tightness level, not below the standard required .

Plastic Doors And Windows Create A New Image Of Building Energy Efficiency

By: weihua

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