苏州地区居住建筑围护结构热湿性能及应用研究

Research on the Thermal and Humidity Performance of the Envelope Structures of Residential Buildings in Suzhou Area and Its Application

苏州地区长期处于高湿环境,墙体保温结露问题日益突出。湿传递不但破坏墙体结构,使墙体保温性能变差,增加建筑能耗,还会提高墙体内霉变的发生概率,影响居住者的健康。为研究苏州地区保温材料对墙体热湿传递的影响,文章以温度和毛细压力为驱动势建立热湿耦合模型,利用COMSOL Multiphysics进行模型求解,并将所得结果与HAMSTAD验证实例进行对比,验证模型的准确性。结果表明:保温材料的性能对建筑墙体热湿传递影响较大。当采用外保温时,XPS能够阻止湿气的进入,防止墙体结露;当采用内保温时,岩棉板可以阻止湿气的积累。且与内保温相比,外保温节能效果更佳。

The long-term high humidity in Suzhou has led to increasingly prominent issues of wall insulation and condensation.Moisture transfer not only damages the wall structure,but also deteriorates the insulation performance of the wall and increases building energy consumption.It will also increase the probability of mold inside the wall,affecting the health of the residents.To study the impact of insulation materials on the heat and moisture transfer of walls in Suzhou,a heat and moisture coupling model was established by taking temperature and capillary pressure as driving forces.The model was solved with COMSOL Multiphysics,and the obtained results were compared with the HAMSTAD validation example to verify the accuracy of the model.The results indicate that the performance of insulation materials has a significant impact on the heat and moisture transfer of building walls.When using external insulation,XPS can prevent the entry of moisture and prevent wall condensation.When using internal insulation,rock wool board can prevent moisture accumulation,and external insulation has better energy-saving effects compared to internal insulation.