严寒地区地下室外墙内壁面热湿特性分析

Hydrothermal Properties in Inner Side of Wall of Basement in Cold Region

当墙体处于高湿环境或墙体存在结露情况时,会诱发墙体表面霉菌等微生物的滋生而影响室内美观、室内空气品质和围护结构耐久性等。目前,对于建筑结露的研究多以地面层为研究对象,对于以地下室为研究对象的较少,但地下室一旦出现结露,将造成严重危害。为研究低温土壤对地下室外墙内壁热湿特性的影响,针对严寒地区建筑的地下室外围护结构热湿耦合传递进行数值模拟。结果表明:在土壤温度较低的冬末春初季节,地下室外墙(挡土墙)内壁壁面处的相对湿度较空气湿度高5%左右,对于使用年限较长、湿气聚集严重的地下室,该差距会加剧结露和发霉等现象出现。通过模拟计算分析得到采用保温措施能够从一定程度上缓解结露和发霉现象的出现。

When the wall is located in high humidity or dewed, fungus and other microorganisms may breed on it, which might influence the sightseeing or indoor air quality or even strength of the structural. Many study of this field are focused on ground floor, a few focus on underground floar, which may leads to serious damage when it dews. A practical building located in Balinzuo banner, Inner Mongolia is simulated to study the influence of low-temperature soil to inner side of the wall of the basement in the matter of dewing. In late winter and early spring when temperature of soil is low, the relative humidity in the surface of wall is 5% higher than that in the air, it＇s more likely to dew. Heat insulation measures can help reducing or delaying dewing or fungus growing.