Insulating glass for the hottest passive window

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Insulating glass for passive windows

according to the European Union's experience in the design and construction of passive houses, as the main component of the building envelope system, the heat transfer coefficient of the whole window needs to be less than 0.8w/(m2.k), of which the glass that accounts for more than 70% of the door and window area needs to be less than 0.6w/(m2.k) while meeting the natural lighting and reducing lighting energy consumption. In addition, the infrared ray that causes indoor cooling load should be isolated outdoors, This ensures that the heat transfer of the window can be effectively reduced, so as to improve the thermal insulation and heat insulation of the whole building

from the physical point of view, there are three main ways of energy loss: radiant heat, air convection heat loss and heat conduction. The air layer in the hollow glass abdominal cavity is isobaric sealed and does not produce convective heat transfer. The heat transfer between the hollow layers is carried out through the long wave heat radiation between the parallel glass plates and the heat conduction with air as the medium, in which the radiation heat transfer occupies an important position. Low-E glass is made by plating Low-E film on the surface of ordinary glass, which has high reflectivity to far-infrared radiation, and maintains good light transmission performance when a large empty knife part is left in the lower half of the same cylinder. Reduce the surface emissivity of the glass. Using Low-E glass can reduce the radiant heat transfer, increase the heat transfer resistance, and reduce the heat transfer coefficient of the insulating glass. Compared with the ordinary double-layer insulating glass, the thermal insulation performance is increased by 50%, playing a good energy-saving effect

in the aspect of winter insulation on 2016 IFAM,

the near-infrared thermal radiation and visible light emitted by the sun can enter the room through the film; At the same time, the long wave heat energy generated by indoor objects, walls, air conditioners, heating and human body is reflected back to the room by the Low-E film, which can effectively isolate the loss of indoor heat through the glass to the cold outdoors, better maintain the indoor temperature and reduce heating energy consumption. In terms of heat insulation in summer, lo W-E film can put visible light into it, and block out the solar radiation, long wave heat energy released by roads and buildings, so as to reduce the energy consumption of air conditioning refrigeration. In addition, it can block the transmission of ultraviolet rays and prevent the indoor objects from fading

6l+16a warm edge argon filling +6c+16a warm edge argon filling +6l, that is, a "three glass two cavity" double hollow structure. First, a 6mm Low-E glass and a 6mm float glass are combined into a hollow, the spacing of the hollow layers is 16mm, and the inner part is filled with argon and sealed with warm edge technology; Then it is combined with another 6mm column, which is usually equipped with a ball screw to fix the movable Low-E glass with a 10 head. The spacing between the hollow layers is still 16mm. After the argon gas is filled inside, the warm edge technology is used for sealing again; Finally, in order to enhance the air tightness, water tightness and wind pressure resistance of the product, a reliable sealant strip is laid between the glass and the window frame, and a thermal insulation interlayer is added. Standard performance of glass: heat transfer coefficient u ≤ 0.6 (w/m2k); SC value ≤ 0.4; Isolation volume ≥ 38dB

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