...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Building and Environment >A fractional mass transfer model for simulating VOC emissions from porous, dry building material
【24h】

A fractional mass transfer model for simulating VOC emissions from porous, dry building material

机译：分数传质模型，用于模拟多孔，干燥建筑材料的VOC排放

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Dry building material is a complex porous medium with a fractal structure. A developed fractional mass transfer model can accurately simulate anomalous diffusion in complex media, such as dry building material. In this work, a new time and space fractional diffusion model is first established to study the transport and emission behaviors of volatile organic compounds (VOCs) in a dry building material in an environmental chamber. In this model, the space fractional derivative is expressed by the weight coefficients of the upward and downward transfer probabilities, and the time fractional derivative and areal porosity of the material are introduced to describe anomalous diffusion. With the newly developed finite difference and parameter estimation methods, the present model can describe the early breakthrough and heavy-tailed phenomena well. Furthermore, the results of the present model show good agreement with the experimental data, as the error value (67.44 mu g/m(3)) is much less than that of Deng and Kim's model (190 mu g/m(3)). The advantages of long-term prediction are shown. Moreover, the effects of key parameters on VOC transport are revealed.
机译：干燥建筑材料是具有分形结构的复杂多孔介质。改进的分数传质模型可以准确模拟在复杂介质（例如干建筑材料）中的异常扩散。在这项工作中，首先建立了一个新的时空分数扩散模型，以研究环境室内干燥建筑材料中挥发性有机化合物（VOC）的传输和排放行为。在该模型中，空间分数导数由向上和向下转移概率的权重系数表示，并且引入了时间分数导数和材料的面孔隙率来描述异常扩散。利用新开发的有限差分和参数估计方法，该模型可以很好地描述早期突破和重尾现象。此外，本模型的结果与实验数据显示出良好的一致性，因为误差值（67.44μg / m（3））远小于邓和金的模型（190μg / m（3））。 。显示了长期预测的优势。此外，揭示了关键参数对VOC传输的影响。

著录项

  • 来源
    《Building and Environment》 |2019年第4期|182-191|共10页
  • 作者

    Zhang Yan; Jiang Jinxia; Bai Yu; Liu Jiemin; Shao Huiqi; Wu Chuandong; Guo Zhongbao;

  • 作者单位

    Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China|Beijing Univ Civil Engn & Architecture, Beijing Key Lab Funct Mat Bldg Struct & Environm, Beijing 100044, Peoples R China;

    Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China|Beijing Univ Civil Engn & Architecture, Beijing Key Lab Funct Mat Bldg Struct & Environm, Beijing 100044, Peoples R China;

    Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China|Beijing Univ Civil Engn & Architecture, Beijing Key Lab Funct Mat Bldg Struct & Environm, Beijing 100044, Peoples R China;

    Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem, Beijing 100083, Peoples R China;

    China Bldg Mat Test & Certificat Grp Co Ltd, Beijing 100024, Peoples R China;

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

    Fractional mass transfer model; VOC emission; Dry building material; Porous medium; Anomalous diffusion;

    机译：分数传质模型;VOC排放;干建筑材料;多孔介质;异常扩散;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号