高湿地区保温墙体防结露措施效果分析

Analysis of the Effect of Anti-condensation Measures of Thermal Insulation Wall in High Humidity Area

为探究高湿地区复合保温墙体空气层、隔汽层两种防结露措施的效果,建立了以温度与相对湿度为计算驱动势的热湿耦合传递模型,并根据实验数据对模型进行了验证。进一步使用模型模拟了冬夏季高湿工况条件下,内外两种保温墙体内部的热湿变化情况。根据模拟结果得出,保温墙体在两种材料界面处具有较高的结露风险。在全年高湿地区,空气层可有效降低墙体内部的结露风险,隔汽层在此工况下防结露效果不佳。

In order to explore the effect of two kinds of anticondensation measures such as the air layer and the vaporbarrier layer in high humidity area, the heatmoisture coupling transfer model based on temperature and relative humidity was established. In addition, the model was validated based on the experimental data. Further, this model was used to simulate the change of heat and moisture about the internal and external thermal insulation wall in winter and summer under highhumidity conditions. According to the simulation results, it is concluded that the insulation wall has higher risk of dew condensation at the interface between the two materials. In high humidity area, the air layer can effectively reduce the risk of dew condensation inside the wall. The application of the vaporbarrier layer is not effectively under above condition.