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A Study on the Similarities between Water Vapor and VOC Diffusion in Porous Media by a Dual Chamber Method

机译:双室法研究多孔介质中水蒸气与VOC扩散的相似性

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摘要

To better understand the similarities and differences between moisture and volatile organic compound (VOC) diffusion through porous media, a dual chamber experimental system was developed. The diffusion and partition coefficients of moisture and selected VOCs in materials were compared. A pilot test with gypsum wallboard and oriented strand board (OSB) showed similar diffusion kinetics between moisture and VOC. To further establish the similarity relationship between VOC and water vapor transport, calcium silicate was used as a reference material to develop the concept of a similarity coefficient and its application in combined heat, air, moisture and pollutant simulation (CHAMPS) in buildings. The diffusion resistance factor calculated for moisture from the dual chamber tests agreed well with that from the conventional dry cup test method. The diffusion behavior of each particular VOC in porous media is predictable as long as the similarity coefficient of the VOC is known. Future experiments will extend this to materials with significant VOC emissions in buildings.
机译:为了更好地理解水分和挥发性有机化合物(VOC)通过多孔介质扩散之间的异同,开发了一个双室实验系统。比较了水分和所选VOC在材料中的扩散和分配系数。石膏墙板和定向刨花板(OSB)的先导测试表明,水分和VOC之间的扩散动力学相似。为了进一步建立VOC与水蒸气输送之间的相似关系,硅酸钙被用作参考材料,以发展相似系数的概念及其在建筑物的热,空气,湿气和污染物模拟(CHAMPS)中的应用。通过双室测试计算得出的水分扩散阻力系数与传统干杯测试方法得出的数值相吻合。只要VOC的相似系数已知,每种特定VOC在多孔介质中的扩散行为都是可以预测的。未来的实验会将其扩展到建筑物中具有大量VOC排放的材料。

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