建筑玻璃贴膜产品隔热膜及玻璃组件的传热系数

建筑玻璃贴膜产品隔热膜及玻璃组件的传热系数

U-VALUE:U-value is a measure of the rate of heat conductivity of a glazing system,independent of solar radiation.When multiplied by the difference between indoor and outdoor temperature in Fahrenheit, it gives the amount of heat in BTUs/hours/square foot of glazing. Note:the greater the difference between indoor and outdoor temperatures,the greater the U-value, so it is important to use the U-values closely representing your conditions. The lower the U-value the better the insulation qualities of the glazing system。

U值：U值是玻璃组件的传热系数。ASHRAE标准条件下，由于玻璃热传递和室内外的温差，所形成的空气到空气的传热量，其英制单位为：英热量单位：英热量单位（BTU）/每小时每平方英尺每华氏温度。公制单位为：瓦/每平方米每摄氏温度。U值越低，通过玻璃的传热量也越低。