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首页> 外文期刊>Building and Environment >Investigation of indoor air pollutant dispersion and cross-contamination around a typical high-rise residential building: Wind tunnel tests
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Investigation of indoor air pollutant dispersion and cross-contamination around a typical high-rise residential building: Wind tunnel tests

机译：典型高层住宅周围室内空气污染物扩散和交叉污染的调查：风洞测试

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摘要

The dispersion of air pollutant in complex building environment has become of great concern as more and more people live in large and crowded cities. The present work is aimed at investigating the indoor air pollutant dispersion and possible cross-unit contamination with typical high-rise residential building design in Hong Kong. Experiments were performed in a boundary layer wind tunnel for a 1:30 scale model that represented a 10-story residential building in prototype. Tracer gas, simulating exhausted room air, was continuously released from three different floor levels, and its concentrations on the adjacent and opposite envelope surfaces were measured using fast flame ionization detectors, while the pressure distributions along building fa?ade were also measured and examined under a typical incoming wind profile. By analyzing the pressure and concentration distribution, the risk of air cross-contamination was evaluated under two wind directions. The experiment results illustrated that, in the so-called re-entrance spaces, the pollutant can spread in both vertical directions, not only in the upward direction that was found under buoyancy effect, but also in the downward direction. Furthermore, dispersion can also occur in the horizontal direction, indicating a potential risk of cross-contamination in the horizontal adjacent flats could not be overlooked as well. The study on this physical process is directly useful for the purpose of prevention and control of infectious diseases outbreak in the residential environment. In the long run, the wind tunnel test data will serve to develop computational tools to assist natural ventilation design for high-rise buildings.
机译：随着越来越多的人生活在拥挤的大城市中，空气污染物在复杂建筑环境中的扩散已引起人们的极大关注。目前的工作旨在调查香港典型的高层住宅建筑设计对室内空气污染物的扩散和可能的跨单元污染。在边界层风洞中进行了比例为1:30的模型的实验，该模型代表了原型的10层住宅建筑。示踪气体从三个不同的楼层连续释放，模拟排出的室内空气，并使用快速火焰电离检测器测量了在相邻和相对的外壳表面上的浓度，同时还测量并检查了建筑立面上的压力分布。典型的来风轮廓。通过分析压力和浓度分布，评估了两个风向下空气交叉污染的风险。实验结果表明，在所谓的再进入空间中，污染物不仅可以在浮力作用下的向上方向上而且可以在向下方向上在两个垂直方向上扩散。此外，在水平方向上也可能发生分散，这表明也不能忽视水平相邻单元之间发生交叉污染的潜在风险。对这种物理过程的研究对于预防和控制居住环境中的传染病暴发直接有用。从长远来看，风洞测试数据将用于开发计算工具，以协助高层建筑的自然通风设计。

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  • 来源
    《Building and Environment》 |2010年第8期|p.1769-1778|共10页
  • 作者

    X.P. Liu; J.L Niu; K.C.S. Kwok; J.H. Wang; B.Z. Li;

  • 作者单位

    Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, PR China;

    CLP Power Wind/Wave Tunnel Facility, Hong Kong University of Science and Technology, Hong Kong;

    Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong;

    Faculty of Urban Construction and Environmental Engineering. Chongqing University, Chongqing 400030, PR China;

    Faculty of Urban Construction and Environmental Engineering. Chongqing University, Chongqing 400030, PR China;

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

    high-rise building; wind tunnel experiment; air cross-contamination; Hong Kong;

    机译：高层建筑;风洞实验;空气交叉污染;香港;

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