The influence of airtightness on contaminant spread in MURBs in cold climates.
The influence of airtightness on contaminant spread in MURBs in cold climates.
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DOI：
10.1007/s12273-021-0787-6
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发表时间：
2022
影响因子：
5.5
通讯作者：
Liao Z
中科院分区：
文献类型：
--
作者：
Mckeen P;Liao Z
由于烟囱效应，寒冷气候下的高层建筑在保持室内空气质量方面具有独特的挑战。在供暖季节，室内空气浮力在垂直轴中产生巨大的压差，可以将气流从较低楼层驱动到较高楼层。这种压力差可能导致污染物在整个建筑物中扩散。最近，对COVID-19的担忧使人们更加关注空气传播疾病在人口密集的建筑物中的潜在传播。对于许多多单元住宅建筑，套房通风传统上依赖于通过机械加压走廊供应的新鲜空气。在寒冷的气候条件下，烟囱效应产生的巨大压差会降低这种方法的有效性。采用多区域和CFD模拟来分析由于烟囱效应引起的气流和污染物扩散。模拟进行了一个理想化的模型，一个10层的建筑物使用一系列的实验得出的气密性参数。模拟表明，烟囱效应可以减少走廊通风套房，甚至扭转气流泄漏的建筑。减少到套房的气流会导致污染物的积累。气流的阻碍会使污染物从套房扩散到整个建筑物。污染物扩散是机械通风、建筑物气密性和环境温度的函数。讨论了减小烟囱效应对机械加压走廊影响的策略。
Tall buildings in cold climates have unique challenges in maintaining indoor air quality due to stack effect. During the heating season, interior air buoyancy creates large pressure differentials in vertical shafts that can drive airflow from lower floors into upper floors. This pressure differential can result in the spread of contaminants throughout a building. Most recently, concern over COVID-19 has increased attention to the potential spread of airborne diseases in densely populated buildings. For many multi-unit residential buildings, suite ventilation has traditionally relied upon fresh air supplied through a mechanically pressurized corridor. In cold climates, large pressure differentials created by stack-effect can reduce the effectiveness of this approach. Multizone and CFD simulations are employed to analyze airflow and contaminant spread due to stack effect. Simulations are conducted on an idealized model of a 10-storey building using a range of experimentally derived airtightness parameters. Simulations demonstrate stack effect can reduce corridor ventilation to suites and even reverse the airflow for leakier buildings. Reduced airflow to suites can result in the accumulation of contaminants. Reversal of the airflow can allow contaminants from a suite to spread throughout the building. Contaminant spread is illustrated as a function of mechanical ventilation, building airtightness, and ambient temperatures. Strategies to reduce the influence of stack effect on mechanically pressurized corridors are discussed.
影响因子：
5.5
作者：
Jiang, Yi;Zhao, Bin;Zhang, Yufeng
通讯作者：
Zhang, Yufeng
DOI：
10.1016/j.ijheh.2005.03.003
发表时间：
2005-01-01
影响因子：
6
作者：
Brasche, S;Bischof, W
通讯作者：
Bischof, W
影响因子：
3.1
作者：
GROSS, D
通讯作者：
GROSS, D