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在玻璃窗上贴透明膜或镀膜,是一种经济实惠的节能技术,既可保温隔热,改善人们的生活条件,又可节约能源。一、贴膜窗的保温隔热作用贴透明膜的窗户具有良好的保温效果,原因是玻璃与薄膜间形成的空气间层的热阻较大。厚度为3mm 的玻璃本身的热阻为0.004m~2K/W,厚度为30μm 聚酯薄膜本身的热阻为0.0002m~2K/W,而当空气间层厚度为20mm 左右时,空气间层的热阻可达0.17m~2K/W。可见单层玻璃本身的热阻仅为空气间层热阻的2.4%,薄膜本身的热阻仅为空
Placing a transparent film or coating on a glass window is an economical and energy-saving technology. It can not only keep heat and heat, improve people’s living conditions, but also save energy. First, the thermal insulation of the film window The window with transparent film has a good thermal insulation effect, because the thermal resistance of the air layer formed between the glass and the film is large. The thermal resistance of the glass with a thickness of 3mm is 0.004m~2K/W and the thickness is 30μm. The thermal resistance of the polyester film itself is 0.0002m~2K/W, and when the air interlayer thickness is about 20mm, the air Thermal resistance up to 0.17m~2K/W. It can be seen that the thermal resistance of the single glass itself is only 2.4% of the thermal resistance of the air layer, and the thermal resistance of the film itself is only empty