Heat And Moisture Transport In PorousMaterials Involving Cyclic Wetting And Drying
Heat And Moisture Transport In PorousMaterials Involving Cyclic Wetting And Drying
复制标题
涉及循环润湿和干燥的多孔材料中的热量和水分传输
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
E. Vejmelková
中科院分区：
文献类型：
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作者：
Erny;J. Mad;Ra;J. Ko;E. Vejmelková
建立了不同气候条件下具有滞回输湿和贮湿参数的多孔建筑材料热湿耦合输运的计算模型。一个扩散型模型用于耦合热湿传输的描述。一个经验的程序被选择来描述对应于润湿和干燥的运输和存储参数之间的路径。在计算机模拟的实际例子中，分析了设置外保温的混凝土墙体。计算结果表明，使用滞后参数和无滞后的模型计算的水分和相对湿度分布非常显着的差异。由于从湿热的角度来看，差异是危险的一面，滞后水分传输和存储参数的计算模型中的应用可以被认为是相当重要的多层建筑材料系统的使用寿命分析。
Computational modeling of coupled heat and moisture transport in porous building materials with hysteretic moisture transport and storage parameters in the conditions of difference climate is presented in the paper. A diffusion-type model is used for the description of coupled heat and moisture transport. An empirical procedure is chosen to describe the path between the transport and storage parameters corresponding to wetting and drying. In a practical example of computer simulation, a concrete wall provided with exterior thermal insulation is analyzed. Computational results reveal very significant differences in moisture and relative humidity profiles calculated using the model with hysteretic parameters and without hysteresis. As the differences are on dangerous side from the hygrothermal point of view, the application of hysteretic moisture transport and storage parameters in computational models can be considered as quite important for service life analyses of multi-layered systems of building materials.