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Airflow assessment in cross-ventilated buildings with operable facade elements

机译：具有可操作立面元素的交叉通风建筑中的气流评估

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摘要

This paper presents an experimental study of basic cross-ventilation flow characteristics that are essential inputs for accurate natural ventilation modelling and design. The study focuses on a generic single-zone building model tested in a wind tunnel under isothermal flow conditions (wind-driven ventilation). An advanced experimental method based on particle image velocimetry (PIV) was devel-oped to investigate the air velocity field in buildings with cross-ventilation. It was found that airflow patterns in rooms with cross-ventilation are complex and cannot be predicted by simplified macroscopic models such as the orifice equation. Inlet-to-outlet ratio and relative location of openings on a building facade are important parameters to be considered, in addition to the wall porosity. This study provides new insights that enable improved design and control of operable facade elements to enhance space cooling using natural ventilation.
机译：本文介绍了基本的交叉通风流动特性的实验研究，这些特性对于准确的自然通风建模和设计是必不可少的。这项研究的重点是在等温流动条件下（风驱动通风）在风洞中测试的通用单区域建筑模型。开发了一种基于粒子图像测速技术（PIV）的先进实验方法，以研究交叉通风建筑中的空气速度场。结果发现，具有交叉通风的房间中的气流模式很复杂，无法通过孔口方程式等简化的宏观模型进行预测。除了墙壁的孔隙率外，建筑物外墙上的入口与出口之比和开口的相对位置也是要考虑的重要参数。这项研究提供了新见解，可以改进可操作外立面元素的设计和控制，从而利用自然通风增强空间冷却。

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  • 来源
    《Building and Environment》 |2011年第1期|p.266-279|共14页
  • 作者

    P. Karava; T. Stathopoulos; A.K. Athienitis;

  • 作者单位

    School of Civil Engineering and Division of Construction Engineering and Management, 550 Stadium Mall Dr., CIVL 1227, West Lafayette, 47907-2051 IN, USA;

    rnCentre for Buildings Studies, Department of Building, Civil and Environmental Engineering, Concordia University, 1455 de Maisonneuve Blvd. W., Montreal, H3C 1M8 QC, Canada;

    rnCentre for Buildings Studies, Department of Building, Civil and Environmental Engineering, Concordia University, 1455 de Maisonneuve Blvd. W., Montreal, H3C 1M8 QC, Canada;

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

    cross-ventilation; wind tunnel experiments; particle image velocimetry; airflow measurements; natural ventilation;

    机译：换气风洞实验;粒子图像测速气流测量;自然通风;

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