期刊
BUILDING AND ENVIRONMENT
卷 39, 期 4, 页码 411-420出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.buildenv.2003.09.015
关键词
particulate matter; deposition; natural ventilation; opening effectiveness; indoor/outdoor ratio; modeling
We applied a simple size-dependent indoor air quality model associated with measured outdoors particulate matter (PM) profiles and potential loss mechanisms to characterize PM indoor/outdoor (I/O) relationships for wind-induced naturally ventilated residences in Taiwan region. The natural ventilation rate was quantified by the opening effectiveness for sidewall opening and covered ridge with sidewall-opening-type homes. The measured results demonstrate that integrated PM10 and PM2.5 mass concentrations for the urban area are 39.2 and 3.13 mug m(-3), respectively, whereas for the suburban area are 75.76 and 69.87 mug m(-3), respectively. The most significant removal mechanisms included natural ventilation through and particle deposition on indoor surfaces. The predicted average PM mass I/O ratios were 0.56 and 0.42 for PM2.5 and PM10, respectively. We also employed published data on mass-weighted size distributions for specific chemical constitutes of PM, sulfate and nitrate, to predict PM I/O ratios in the central Taiwan region; the resulting values ranged from 0.22 to 0.43 and 0.27 to 0.36 for sulfate and nitrate, respectively. Our results demonstrate that the PM I/O ratios for a wind-induced natural ventilated airspace depend strongly on the ambient particle distributions, building openings design (e.g. height-to-length ratio of openings and roof slope), wind speed, wind angle of incidence, and outdoor PM metrics. (C) 2003 Elsevier Ltd. All rights reserved.
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