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Study of the resistances to transfer of gaseous pollutant between material and indoor air

机译：气态污染物在材料与室内空气之间转移的阻力研究

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摘要

The main parameters which control the emission of volatile organic compounds between wall materials and indoor air were examined. A physically based model considers that the global emission phenomenon results from three elementary physical phenomena: diffusion through the boundary layer separating the wall from environment, diffusion within the porous network of the materials, and sorption of the gas molecules on the active sites of the materials. The pollutant transfer between porous material and air is therefore subjected to two complementary resistances and we identify first the resistance which controls the transfer. Then, we predict the global emission time constant from the mass transfer coefficient of convection and the thickness of the material. Experimental results from a small scale chamber are compared to predicted values in the case of acetone emission from chipboard in humid air and for high initial acetone concentration. Good agreement is obtained at the beginning of emission but an acetone retention effect by chipboard is observed, showing that it will be necessary to take into account the interactions of water vapor with materials and the pollutants to achieve accurate modeling of the material VOC emission process.
机译：研究了控制壁材料与室内空气之间挥发性有机化合物排放的主要参数。基于物理的模型认为，整体排放现象是由三个基本的物理现象引起的：通过将壁与环境隔开的边界层扩散，材料的多孔网络内扩散以及气体分子在材料的活性位点上的吸附。因此，多孔材料与空气之间的污染物转移受到两个互补的阻力，我们首先确定控制转移的阻力。然后，我们根据对流的传质系数和材料的厚度预测全局发射时间常数。在潮湿的空气中，从丙酮中排出丙酮的情况下，对于较高的初始丙酮浓度，将小规模试验箱的实验结果与预测值进行比较。在排放开始时获得了良好的一致性，但是观察到了刨花板对丙酮的保留效果，这表明必须考虑水蒸气与材料和污染物的相互作用才能实现材料VOC排放过程的精确建模。

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  • 来源
    《Building and Environment》 |2011年第2期|p.356-362|共7页
  • 作者

    Michael Marion; Anne Use Tiffonnet; Alina Santa-Cruz; Rachid Makhloufi;

  • 作者单位

    IUT Cherbourg-Manche, Departement GTE, 120, Rue de l'exode - 50000 Saint-Lo, France,Laboratoire Universitaire des Sciences Appliquees de Cherbourg (LUSAC, EA 4253), Site Universitaire, BP 78- 50130 Octeville, France;

    IUT Cherbourg-Manche, Departement GTE, 120, Rue de l'exode - 50000 Saint-Lo, France,Laboratoire Universitaire des Sciences Appliquees de Cherbourg (LUSAC, EA 4253), Site Universitaire, BP 78- 50130 Octeville, France;

    Laboratoire Universitaire des Sciences Appliquees de Cherbourg (LUSAC, EA 4253), Site Universitaire, BP 78- 50130 Octeville, France,ESIX Normandie, rue Louis Aragon Site Universitaire, BP 78- 50130 Octeville, France;

    Laboratoire Universitaire des Sciences Appliquees de Cherbourg (LUSAC, EA 4253), Site Universitaire, BP 78- 50130 Octeville, France,ESIX Normandie, rue Louis Aragon Site Universitaire, BP 78- 50130 Octeville, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    air quality; volatile organic compounds; sorption; mass transfer;

    机译：空气质量;挥发性有机化合物;吸附传质;

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