外墙隔热涂料和玻璃隔热涂料的节能分析

设计建筑的简化传热模型,分析和计算了夏热冬暖地区外墙隔热涂料和玻璃隔热涂料对夏季室内的降温与节电效果。当外墙隔热涂料的太阳反射比增大到一定程度时,可使得室内温度低于室外温度。但由于直接透过玻璃的太阳辐射热的影响,即使玻璃隔热涂料的遮蔽系数很小,也难以使得室内温度低于室外温度。模拟计算结果表明,对于自然状态下可使室内温度降低2℃的外墙隔热涂料和玻璃隔热涂料,使用后可节约空调用电分别为20.6%和15.4%。

Analysis on the Energy-saving Property of Exterior Wall Heat-insulation Coatings and Glass Heat-insulation Coatings

Through the simplified heat-transfer model of building,this paper analyzes and calculates the indoor temperature reduction and electricity-saving effect of exterior wall heat-insulation coatings and glass heat-insulation coatings in the hot summer and warm winter area in summer.Solar-reflectivity ratio increasing to some degree,the indoor temperature will be lower than outdoor temperature.But because of the solar radiation heat that directly penetrates through the glass,though the sheltering coefficient of glass heat-insulation coatings is very little,the indoor temperature is still hard to be lower than outdoor temperature.Simulating calculate shows that,if the exterior wall heat-insulation coatings and glass heat-insulation coatings reduce the indoor temperature 2℃ at natural state,the electricity of air-conditioner can be saved 20.6% and 15.4% respectively.