【摘要】：運(yùn)用開(kāi)爾文定律和克勞修斯-克拉貝龍方程,將多孔建筑材料內(nèi)水蒸氣傳遞量和液態(tài)水傳遞量轉(zhuǎn)變?yōu)橐运魵夥謮毫轵?qū)動(dòng)勢(shì)的統(tǒng)一函數(shù),以溫度和水蒸氣分壓力為驅(qū)動(dòng)勢(shì)建立了熱濕耦合傳遞模型,并模擬分析了上海地區(qū)自然干燥狀態(tài)下加氣混凝土砌塊墻體10a的熱濕性能變化規(guī)律.結(jié)果表明:對(duì)于初始溫度為298K,含濕量(質(zhì)量分?jǐn)?shù),下同)分別為2.91%,3.45%,5.03%,8.60%的4種工況,經(jīng)過(guò)1a的使用后,墻體內(nèi)的溫濕度分布不再受初始條件影響;在正常情況階段,墻體內(nèi)表面相對(duì)濕度均小于1.0,不會(huì)出現(xiàn)結(jié)露現(xiàn)象,但是在部分時(shí)段超過(guò)了0.8,易產(chǎn)生霉變;墻體內(nèi)部含濕量呈周期性變化,空調(diào)季為3.34%~8.31%,平均值4.45%;采暖季為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.
【作者單位】： 中國(guó)礦業(yè)大學(xué)力學(xué)與建筑工程學(xué)院;
【基金】：江蘇省“六大人才高峰”資助項(xiàng)目(2010-JZ-006) 江蘇省優(yōu)勢(shì)學(xué)科建設(shè)工程資助項(xiàng)目(SA1205)
【分類(lèi)號(hào)】：TU522.3

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