蒸压加气混凝土砌块墙体热湿耦合传递特性
发布时间：2018-08-23 19:47
【摘要】：运用开尔文定律和克劳修斯-克拉贝龙方程,将多孔建筑材料内水蒸气传递量和液态水传递量转变为以水蒸气分压力为驱动势的统一函数,以温度和水蒸气分压力为驱动势建立了热湿耦合传递模型,并模拟分析了上海地区自然干燥状态下加气混凝土砌块墙体10a的热湿性能变化规律.结果表明:对于初始温度为298K,含湿量(质量分数,下同)分别为2.91%,3.45%,5.03%,8.60%的4种工况,经过1a的使用后,墙体内的温湿度分布不再受初始条件影响;在正常情况阶段,墙体内表面相对湿度均小于1.0,不会出现结露现象,但是在部分时段超过了0.8,易产生霉变;墙体内部含湿量呈周期性变化,空调季为3.34%~8.31%,平均值4.45%;采暖季为3.31%~3.69%,平均值3.47%.
[Abstract]:By using Kelvin's law and Clausius-Clabelon equation, the water vapor transfer and liquid water transfer in porous building materials are transformed into a unified function with the partial pressure of water vapor as the driving potential. The thermal-moisture coupling transfer model is established with temperature and water vapor partial pressure as driving potential. The thermal and moisture properties of aerated concrete block wall under natural drying condition in Shanghai area are simulated and analyzed for 10 years. The results show that when the initial temperature is 298K and the moisture content (mass fraction) is 2.91%, the temperature and humidity distribution in the wall is no longer affected by the initial conditions after one year's use. The relative humidity of the inner surface of the wall is less than 1.0, and there will be no condensation, but in part of the time period it is more than 0.8, which is easy to produce mildew. The moisture content of the wall changes periodically, and the air conditioning season is 3.340.31 and the average is 4.455.The heating season is 3.31 and the average is 3.69, the average is 3.47.
【作者单位】： 中国矿业大学力学与建筑工程学院;
【基金】：江苏省“六大人才高峰”资助项目(2010-JZ-006) 江苏省优势学科建设工程资助项目(SA1205)
【分类号】：TU522.3
[Abstract]:By using Kelvin's law and Clausius-Clabelon equation, the water vapor transfer and liquid water transfer in porous building materials are transformed into a unified function with the partial pressure of water vapor as the driving potential. The thermal-moisture coupling transfer model is established with temperature and water vapor partial pressure as driving potential. The thermal and moisture properties of aerated concrete block wall under natural drying condition in Shanghai area are simulated and analyzed for 10 years. The results show that when the initial temperature is 298K and the moisture content (mass fraction) is 2.91%, the temperature and humidity distribution in the wall is no longer affected by the initial conditions after one year's use. The relative humidity of the inner surface of the wall is less than 1.0, and there will be no condensation, but in part of the time period it is more than 0.8, which is easy to produce mildew. The moisture content of the wall changes periodically, and the air conditioning season is 3.340.31 and the average is 4.455.The heating season is 3.31 and the average is 3.69, the average is 3.47.
【作者单位】： 中国矿业大学力学与建筑工程学院;
【基金】：江苏省“六大人才高峰”资助项目(2010-JZ-006) 江苏省优势学科建设工程资助项目(SA1205)
【分类号】：TU522.3
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