Size-Dependent PM sub(10) Indoor/Outdoor/Personal Relationships for a Wind-Induced Naturally Ventilated Airspace

The indoor/outdoor PM sub(10) ratios were calculated for a wind-induced naturally ventilated airspace, taking into consideration the size-dependent effects on indoor PM sub(10) levels. An opening effectiveness model was employed to quantify the wind-induced natural ventilation for sidewall openings...

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Published inAtmospheric environment (1994) Vol. 37; no. 22; p. 3065
Main Authors Liao, Chung-Min, Chen, Jein-Wen, Huang, Su-Jui
Format Journal Article
LanguageEnglish
Published 01.07.2003
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ISSN1352-2310
DOI10.1016/S1352-2310(03)00291-7

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Abstract The indoor/outdoor PM sub(10) ratios were calculated for a wind-induced naturally ventilated airspace, taking into consideration the size-dependent effects on indoor PM sub(10) levels. An opening effectiveness model was employed to quantify the wind-induced natural ventilation for sidewall openings and covered ridge with sidewall openings. For sidewall opening and covered ridge with sidewall opening homes, which are found commonly in Taiwan, the PM sub(10) mass indoor/outdoor ratios ranged 0.150.24 and 0.200.32, respectively. Comparison of the human respiratory tract deposition data with the theoretical predictions revealed that the predictions were in good agreement with the experimental deposition profiles in lung regions. The extrathoracic region had higher PM sub(10) mass lung/indoor ratios than did the bronchialbronchiolar and the alveolarinterstitial regions.
AbstractList The indoor/outdoor PM sub(10) ratios were calculated for a wind-induced naturally ventilated airspace, taking into consideration the size-dependent effects on indoor PM sub(10) levels. An opening effectiveness model was employed to quantify the wind-induced natural ventilation for sidewall openings and covered ridge with sidewall openings. For sidewall opening and covered ridge with sidewall opening homes, which are found commonly in Taiwan, the PM sub(10) mass indoor/outdoor ratios ranged 0.150.24 and 0.200.32, respectively. Comparison of the human respiratory tract deposition data with the theoretical predictions revealed that the predictions were in good agreement with the experimental deposition profiles in lung regions. The extrathoracic region had higher PM sub(10) mass lung/indoor ratios than did the bronchialbronchiolar and the alveolarinterstitial regions.
We applied a simple size-dependent indoor air quality model associated with a compartmental lung model to characterize PM sub(10) indoor-outdoor-personal exposure relationships for wind-induced naturally ventilated residences in Taiwan region. The natural ventilation rate was quantified by the opening effectiveness for sidewall opening (SP) and covered ridge with sidewall opening (CRSP) type homes. The predicted PM sub(10) mass indoor/outdoor (I/O) ratios were 0.15-0.24 and 0.20-0.32, respectively, for SP and CRSP type homes. Results demonstrate that PM sub(10) I/O ratios for a wind-induced naturally ventilated airspace depend strongly on the ambient PM size distributions, building openings design (e.g. height to length ratio of openings and roof slope), wind speed and wind angle of incidence. The predictions from our lung model agreed favorable with the experimental deposition profiles in extrathoracic (ET), bronchial- bronchiolar (BB), and alveolar-interstitial (AI) regions. Our results demonstrate that ET region has higher PM sub(10) mass lung/indoor ratios (for north Taiwan region: 0.67-0.78; for central: 0.66-0.74) than that of BB (for north: 0.36-0.57; for central: 0.33-0.47) and AI regions (for north: 0.05-0.35; for central: 0.02-0.22). The present approach can be used in the future to appraise the significance of inter-subject lung morphology and breathing physiology variability for PM deposition and dose calculations.
Author Liao, Chung-Min
Huang, Su-Jui
Chen, Jein-Wen
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Snippet The indoor/outdoor PM sub(10) ratios were calculated for a wind-induced naturally ventilated airspace, taking into consideration the size-dependent effects on...
We applied a simple size-dependent indoor air quality model associated with a compartmental lung model to characterize PM sub(10) indoor-outdoor-personal...
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Title Size-Dependent PM sub(10) Indoor/Outdoor/Personal Relationships for a Wind-Induced Naturally Ventilated Airspace
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