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    The development trend of integrated energy-saving doors and windows with built-in sunshade shutters

    2021-07-21 16:59:35
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    National standards related to building energy efficiency put forward new and improved requirements for the building shading industry, and building acceptance must meet the following standards and specifications:


     1. "Design Standard for Energy Efficiency of Public Buildings" GB50189-2015 3.2.5


    Buildings in areas with hot summers and warm winters, hot summers and cold winters, and mild areas should take sun-shading measures for all facing exterior windows (including light-transmitting curtain walls). Shading measures should be adopted for buildings in cold areas. The following requirements should be met when installing external windows:


    (1) Active external shading should be installed in the east-west direction, and horizontal external shading should be installed in the south direction


    (2) The external shading device of the building should take into account both ventilation and winter daylight.


    ?, "Green Building Evaluation Standard" GB/T50378-2014 8.2.8


    Adopt adjustable shading measures to reduce the heat gain from the sun in summer, and the total evaluation score is 12 points. In the transparent part of the outer window and curtain wall, if the proportion of the area with controllable shading adjustment measures is up to 25%, 6 points are awarded; up to 50%, 12 points are awarded.


    3. "Design Standard for Energy Efficiency of Residential Buildings in Hot Summer and Warm Winter Areas" JGJ75-2012 4.0.10


    The east and west exterior windows of residential buildings must adopt building exterior shading measures, and the building exterior shading coefficient SC should not be greater than 0.8. According to the requirements of the standard:


    The form and application of movable building shading is imperative!



    Modern buildings are an important part of energy consumption, and building energy conservation has become a practical issue of high social concern. With the continuous improvement of national policies, the requirements for building energy conservation in civil and industrial construction projects continue to increase, and doors and windows (accounting for more than 60% of the total building energy consumption) require “shading and heat insulation” in summer and “heating and heat preservation” in winter.


    According to relevant national and multi-local standards, it can be divided into:


    1. Heat transfer coefficient K value


    ①The whole window of energy-saving doors and windows should be less than 2.5w (/ m2?k);


     ②Low-energy-consumption doors and windows should be less than 2.0w (/ m2?k);


     ③Ultra-low energy consumption doors and windows should be less than 1.5w (/ m2?k);


     ④Near-zero energy consumption doors and windows should be less than 1.3w (/ m2?k);


     ⑤Zero-energy windows and doors should be less than 0.8w (/ m2?k).


     2. The shading coefficient SC should be less than 0.3 3. The visible light transmittance should be greater than 0.65


    After repeated testing and verification, the products produced by Jiangsu Zhongcheng Blinds Company can meet the three rigid index requirements of the above-mentioned national standards for building energy-saving windows, and have been fully recognized by market and industry experts.





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