自然通风对轻质墙体的热湿传递影响

Heat and Moisture Transfer of Light-weight Wall with Natural Ventilation

为了研究自然通风对轻质墙体热湿传递的影响,设计了一种通风型太阳能光伏多层外墙结构,通过测试房和对比房的对比实验,得出以下结论:光伏组件的遮挡和空气层的存在能减小墙体的得热量,从而减小空调负荷;开启光伏组件背面通风流道,能使墙体更快地干燥,降低墙体内的相对湿度,减小墙体内的湿积累,并可为墙体机械通风时空气层排湿风机的设计提供实验依据。

In order to investigate the heat and moisture permeability of light-weight wall under natu- ral ventilation, multilayer external wall with photavaltaic panels and ventilation channels is presented. By conducting comparative study in testing room and referential room respectively, the experiment concludes that photovoltaic modules and ventilation channels have active influence on reducing air conditioning load and light-weight wall＇s heat gain. Opening the ventilation channel on the back of photavoltaic modules, relative humidity and moisture accumulation of the wall can be decreased, thus the wall can be dried more quickly. Besides, this conclusion can be considered as the design basis of fan in the air channel to remove moisture with mechanical ventilation.