不同遮阳板材料涂隔热膜后的光谱透射率

Spectral transmittance of different sun shield materials coated with thermal insulation film

常见的遮阳方式可见光透过率都很低,在阻挡了大部分近红外太阳辐射热而降低建筑空调能耗的同时,却导致室内光照不足而不得不使用人工照明。因此,理想的遮阳必须在有效节能的同时,室内也有较好的自然光环境。研究了涂有UTI-BT500液体隔热膜(具有光谱选择特性)的几种透明板材(钢化玻璃、耐力板、有机玻璃)的紫外可见红外透射率。结果表明,这些材料涂隔热膜后可见光和红外线部分透射率均有不同程度的降低,后者下降极其显著。钢化玻璃涂隔热膜后,红外线波段透射率低至40%以下,红外阻隔效果好,且可见光透过率在70%以上。有机玻璃和各种耐力板涂隔热膜后,在800～1100nm红外波段内,透射率仍高达50%～80%,红外阻隔效果不好。

The visible light transmittance of common sunshade is low. It can reduce energy consumption of building air conditioning through preventing sun radiant heat and at the same time also leads to indoor insufficient daylight and have to use artificial lighting. Therefore, the perfect sunshade must effectively save energy and at the same time maintain better indoor daylight environment, study was made on spectral transmittance of some kinds of transparent board （toughened glass, resistant board, organic glass） coated with UTI-BT500 liquid thermal insulation film. The results show that visible light and infrared transmittances of these materials coated with thermal insulation film were reduced to a different extent,the latter was reduced obviously. Infrared and visible light transmittances of toughened glass coated with thermal insulation film were below 40% and above 70% respectively,which can prevent infrared sun radiant heat effectively. Within infrared band of 800 nm-1100 nm transmittance of resistant boards and organic glass coated with thermal insulation film were still up to 50%-80%,which can not prevent infrared sun radiant heat effectively.