Indoor/outdoor relationship of PM2.5 concentration in typical buildings with and without air cleaning in Beijing
Indoor/outdoor relationship of PM2.5 concentration in typical buildings with and without air cleaning in Beijing
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DOI：
10.1177/1420326x15604349
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发表时间：
2017-01-01
影响因子：
3.6
通讯作者：
Wang, Zhiyong
中科院分区：
文献类型：
--
作者：
Deng, Gaofeng;Li, Zenghe;Wang, Zhiyong
对北京市中心城区7个采样点：篮球场、酒店、购物中心、科研中心、商业办公、公寓楼和别墅等7个采样点进行了室内和室外颗粒物2.5(PM2.5)浓度的监测，以确定2014年2月至2014年3月北京市中心区PM2.5质量浓度的室内外关系。评价了4种通风方式对PM2.5浓度的室内外比值的影响。结果表明，当室外PM2.5浓度大于150微克/立方米(3)时，7个测点的平均I/O比为0.36；当室外PM2.5浓度小于100微克/立方米(3)时，7个测点的平均I/O比为1.1，这表明人们的活动可能是室内PM2.5水平升高的最可能因素。公共建筑的平均I/O比为0.69，住宅的平均I/O比为0.94，这表明住宅的室内PM2.5浓度可能由室外来源主导。在配备了空气净化和新风系统的风机盘管单元的公共建筑中，大约90%的室外颗粒物被去除。结果表明，使用适当的通风系统和空气净化系统来改善室内空气质量是必要的。
Indoor and outdoor particulate matter 2.5 (PM2.5) concentrations were monitored in seven sampling sites: basketball stadium, hotel, shopping centre, research centre, commercial office, apartment building and villa, to determine the indoor and outdoor relationship of PM2.5 mass concentration in the central area of Beijing from February 2014 to March 2014. The influence of four types of ventilation systems on indoor to outdoor (I/O) ratio of PM2.5 concentration was evaluated. The measured results show that the mean I/O ratio of the seven locations was 0.36 when the outdoor PM2.5 concentration was more than 150 mu g/m(3), and 1.1 when the outdoor PM2.5 concentration was less than 100 mu g/m(3), which implies that people's activities could be the most likely factor rather than outdoor sources for elevated indoor PM2.5 levels. The average I/O ratio was 0.69 for public buildings and 0.94 for residential homes, which illustrates that indoor PM2.5 concentrations could be dominated by outdoor sources for residential homes. Approximately 90% of the outdoor particles were removed in public buildings equipped with fan-coil unit with air cleaning plus fresh air system. The results demonstrate the need to improve indoor air quality by using a proper ventilation system with air cleaning.