| 多孔建材中VOC扩散系数的两尺度模型 |
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| 引用本文： | 熊建银,张寅平,王新轲,钱科. 多孔建材中VOC扩散系数的两尺度模型[J]. 工程热物理学报, 2008, 29(12) |
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| 作者姓名： | 熊建银 张寅平 王新轲 钱科 |
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| 作者单位： | 清华大学建筑技术科学系,北京,100084;清华大学建筑技术科学系,北京,100084;清华大学建筑技术科学系,北京,100084;清华大学建筑技术科学系,北京,100084 |
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| 基金项目： | 国家杰出青年科学基金项目，十一五国家科技支撑计划项目 |
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| 摘 要： | 基于对建材微观结构的分析和压汞实验,提出了预测建材中有机挥发物(VOC)扩散系数的宏观一介观两尺度模型.和传统的从压汞实验计算扩散系数方法不同的是,本模型不仅考虑了孔隙率,还对孔的尺度分布和孔的连接方式进行了研究和分析.三种不同中密度板中VOC的散发实验表明,采用新模型计算的扩散系数比文献中的传统模型更好地吻合实验数据.
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| 关 键 词： | 室内空气品质 有机挥发物 多孔介质 扩散系数 传质 |
TWO SCALE MODEL FOR PREDICTING THE VOC DIFFUSION COEFFICIENT IN POROUS BUILDING MATERIALS |
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| XIONG Jian-Yin,ZHANG Yin-Ping,WANG Xin-Ke,QIAN Ke. TWO SCALE MODEL FOR PREDICTING THE VOC DIFFUSION COEFFICIENT IN POROUS BUILDING MATERIALS[J]. Journal of Engineering Thermophysics, 2008, 29(12) |
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| Authors: | XIONG Jian-Yin ZHANG Yin-Ping WANG Xin-Ke QIAN Ke |
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| Affiliation: | XIONG Jian-Yin ZHANG Yin-Ping WANG Xin-Ke QIAN Ke (Department of Building Science,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Based on the micro structure analysis of building material and mercury intruding porosime- try tests,a macro-meso two scale model for predicting the diffusion coefficient of volatile organic com- pounds(VOCs)is proposed.Different from traditional model for diffusion coefficient in the literature, the present model not only considers the porosity,but also considers the pore size distribution and pore connection modes.Emission experiments for three kinds of medium-density boards indicate that the calculated r... |
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| Keywords: | indoor air quality volatile organic compounds(VOCs) porous media diffusion coefficient mass transfer |
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