当前位置: X-MOL 学术Indoor Air › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Infiltration of fine particles in urban daycares.
Indoor Air ( IF 5.8 ) Pub Date : 2020-05-04 , DOI: 10.1111/ina.12679
Zuraimi M Sultan 1 , Jovan Pantelic 2 , Kwok Wai Tham 3
Affiliation  

Singapore is a tropical country with a high density of day‐care facilities whose indoor environments may be adversely affected by outdoor fine particle (PM2.5) air pollution. To reduce this problem requires effective, evidence‐based exposure‐reduction strategies. Little information is available on the penetration of outdoor PM2.5 into day‐care environments. Our study attempted to address the following objectives: to measure indoor infiltration factor (Finf) of PM2.5 from outdoor PM2.5 and to determine the building parameters that modify the indoor PM2.5. We collected indoor/outdoor 1‐min PM2.5 from 50 day‐care classrooms. We noted mean Finf ± SD of 0.65 ± 0.22 in day‐care rooms which are naturally ventilated and lower Finf ± SD values of 0.47 ± 0.18 for those that are air‐conditioned: values which are lower than those reported in Singapore residences. The air exchange rates were higher in naturally ventilated rooms (1.47 vs 0.86 h−1). However, fine particle deposition rates were lower for naturally ventilated rooms (0.67 ± 0.43 h−1) compared with air‐conditioned ones (1.03 ± 0.55 h−1) presumably due to composite rates linked to the filters within the split unit air‐conditioners, higher recirculation rates, and interior surfaces in the latter. Our findings indicate that children remaining indoor in daycares where air‐conditioning is used can reduce their PM2.5 exposures during outdoor pollution episodes.

中文翻译:

城市日托中细小颗粒的渗透。

新加坡是一个热带国家,日托设施密度很高,其室内环境可能会受到室外细颗粒物(PM 2.5)空气污染的不利影响。要减少此问题,需要有效的,基于证据的减少接触的策略。关于将室外PM 2.5渗透到日托环境中的信息很少。我们的研究试图解决以下目标:测量PM 2.5从室外PM 2.5的室内渗透因子(F inf),并确定修改室内PM 2.5的建筑参数。我们从50个日托教室收集了室内/室外1分钟PM 2.5。我们注意到卑鄙 自然通风的日托室的F inf ±SD为0.65±0.22,装有空调的房间的F inf  ±SD值为0.47±0.18,低于新加坡居民的报告值。自然通风房间的空气交换率更高(1.47对0.86 h -1)。然而,与空调房间(1.03±0.55 h -1)相比,自然通风房间(0.67±0.43 h -1)的细颗粒沉积速率要低。)可能是由于与分体式空调器中的过滤器相关的复合速率,更高的再循环率以及后者的内表面。我们的研究结果表明,留在室内日托机构中使用空调的儿童可以减少室外污染事件中PM 2.5的暴露。
更新日期:2020-05-04
down
wechat
bug