Pilot-study on airborne PM2.5 filtration with particle accelerated collision technology in office environments

被引:16
作者
Araji, Mohamad T. [1 ]
Ray, Stephen D. [2 ,3 ]
Leung, Luke [3 ]
机构
[1] Univ Manitoba, Environm Design, Fac Architecture, 201 John A Russell Bldg, Winnipeg, MB R3T 2N2, Canada
[2] North Pk Univ, Dept Phys & Engn, 3225 W Foster Ave, Chicago, IL 60625 USA
[3] Skidmore Owings & Merrill LLP, 224 South Michigan Ave, Chicago, IL 60604 USA
关键词
Airborne contamination reduction; Ambient PM2.5 patterns; Indoor air quality; Air filtration performance; Human health and building standards; AIR-POLLUTION; EXPOSURE; INDOOR; VENTILATION; FINE; MORTALITY;
D O I
10.1016/j.scs.2016.08.023
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Particulate matter in an indoor air is the cause of various health concerns. Implementing appropriate air filtration strategies to mitigate its effects would improve occupants' wellbeing who spend many hours a day inside buildings. This study examined PM2.5 with a new filtration technology that incorporates particle-accelerated collision, utilizing semiconductor airborne contamination reduction. In-situ monitoring for 240 h was conducted for an office space. Outdoor PM2.5 concentrations were measured during high variability periods, and indoor-outdoor ratios (I/O) were classified by occupancy conditions. The results indicated that under the new technology, 95% of the hourly indoor PM2.5 concentration readings were below the acceptable threshold of 12 mu g/m(3), yielding a median of 5 mu g/m(3) and interquartile range of 3 mu g/m(3). The factor by which I/O increased from unoccupied to occupied hours ranged between 1.102.88, with indoor PM2.5 exceeding outdoor concentrations for 11.67% of the time. The respective range for a comparative filtration system with a standard efficiency rating was 4.3510.43, with excess rate of 25.45%. Scatterplots of co-located indoor and outdoor PM2.5 generated regression line with a slope of 0.004 and deviation of 15.3% for the new technology, deeming indoor levels almost independent of outdoor conditions (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:101 / 107
页数:7
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