Numerical evaluation of influence of door opening on interzonal air exchange
Numerical evaluation of influence of door opening on interzonal air exchange
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DOI：
10.1016/j.buildenv.2016.03.017
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发表时间：
2016-06-01
影响因子：
7.4
通讯作者：
Kurabuchi, Takashi
中科院分区：
文献类型：
--
作者：
Lee, Sihwan;Park, Beungyong;Kurabuchi, Takashi
空气污染房间的通风计划必须解决污染物问题，因为污染物会影响邻近区域的空气质量。通风方案通常保持室内负压以解决此问题。然而，室内空气污染物在房间之间的传输受到人和门的运动的影响。本研究旨在评估门开启对区域间空气交换量的影响。我们通过分散六氟化硫（SF6）作为示踪气体，在办公楼的空气污染的房间和走廊之间摆动或滑动门，并测量气流的方向和速度，来测量区域间的空气交换量。计算流体动力学（CFD）模拟的结果进行了比较。我们模拟了不同速度的门的摆动和滑动以及房间之间的空气温差对区域间空气交换量的影响。测得的绝对区域间空气交换量与CFD模拟获得的值（0.428 m（3））非常相似，流量随时间变化的测量值和模拟值也非常相似。在等温条件下，滑动门通过门道的区域间空气交换量减少到0.052 m3，而摆动门为0.317 m3。然而，当涉及区域之间的温差时，对于摆动门与滑动门，通过门口的区域间空气交换量没有显著差异。(C)2016爱思唯尔有限公司版权所有
Ventilation plans for rooms with contaminated air must address pollutants because they affect the air quality of adjacent areas. A ventilation plan typically maintains a negative room pressure to remedy this problem. However, the transport of indoor air pollutants between rooms is affected by the movements of humans and doors. The purpose of this study was to evaluate the influence of door opening on the interzonal air exchange volume. We measured the interzonal air exchange volume by dispersing sulfur hexafluoride (SF6) as a tracer gas, swinging or sliding a door between an air-contaminated room and a corridor in an office building, and measuring the direction and velocity of the airflow. The results were compared to those of a computational fluid dynamics (CFD) simulation. We modeled the influence of swinging and sliding of a door at various speeds and air temperature differences between rooms on the interzonal air exchange volume. The measured absolute interzonal air exchange volume was very similar to the value obtained from CFD simulation (0.428 m(3)), and the measured and simulated values of flow rate variation over time were also quite similar. The interzonal air exchange volume through the doorway was decreased to 0.052 m(3) with a sliding door, compared to 0.317 m(3) for a swing door, for isothermal conditions. However, the interzonal air exchange volume through the doorway were not significantly different for a swing door versus sliding door when a temperature difference between areas was involved. (C) 2016 Elsevier Ltd. All rights reserved.