Heat and mass transfer through porous media
Heat and mass transfer through porous media
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通过多孔介质进行传热和传质
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
L. Glicksman
中科院分区：
文献类型：
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作者：
S. Motakef;L. Glicksman
液态水在屋顶隔热材料中的行为对于确定隔热材料将倾向于积聚水或变干的条件是重要的。本文建立了一维准稳态分析模型，模拟了在温度和蒸汽浓度梯度作用下，多孔板中热质的瞬态相变输运过程。小规模的实验研究通过玻璃纤维绝缘的热量和水分传输进行。这些实验表明，冷凝物倾向于以不均匀的方式积聚。尽管在水分分布的不规则性，从这些实验的数据表明，准稳态模型是能够预测的瞬态行为的热量和水分传输在屋顶隔热。此外，准稳态模型与其他研究人员的实验结果吻合得很好。参考文献12篇，图38，13片
The behavior of liquid water in roof insulation is important in determining the conditions for which the insulation will tend to accumulate water or dry out. A one-dimensional, quasi-steady, analytical model is developed to simulate transient transport of heat and mass with phase change through a porous slab subjected to temperature and vapor concentration gradients. Small scale experiments examining the heat and moisture transport through fiberglass insulation were conducted. These experiments indicate that condensate tends to accumulate in a non-uniform manner. In spite of the irregularities in moisture distribution, the data from these experiments indicate that the quasi-steady model is capable of predicting the transient behavior of heat and moisture transport in roof insulation. Additionally, the quasi-steady model is shown to agree well with the experimental results from other researchers. 12 refs., 38 figs., 13 tabs.