Effect of cabin ventilation rate on ultrafine particle exposure inside automobiles

Knibbs, Luke D., de Dear, Richard J. and Morawska, Lidia (2010) Effect of cabin ventilation rate on ultrafine particle exposure inside automobiles. Environmental Science & Technology, 44 9: 3546-3551. doi:10.1021/es9038209

Author Knibbs, Luke D.
de Dear, Richard J.
Morawska, Lidia
Title Effect of cabin ventilation rate on ultrafine particle exposure inside automobiles
Journal name Environmental Science & Technology   Check publisher's open access policy
ISSN 0013-936X
Publication date 2010-05
Sub-type Article (original research)
DOI 10.1021/es9038209
Volume 44
Issue 9
Start page 3546
End page 3551
Total pages 6
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract We alternately measured on-road and in-vehicle ultrafine (<100 nm) particle (UFP) concentration for 5 passenger vehicles that comprised an age range of 18 years. A range of cabin ventilation settings were assessed during 301 trips through a 4 km road tunnel in Sydney, Australia. Outdoor air flow (ventilation) rates under these settings were quantified on open roads using tracer gas techniques. Significant variability in tunnel trip average median in-cabin/on-road (I/O) UFP ratios was observed (0.08 to ∼1.0). Based on data spanning all test automobiles and ventilation settings, a positive linear relationship was found between outdoor air flow rate and I/O ratio, with the former accounting for a substantial proportion of variation in the latter (R 2 = 0.81). UFP concentrations recorded in-cabin during tunnel travel were significantly higher than those reported by comparable studies performed on open roadways. A simple mathematical model afforded the ability to predict tunnel trip average in-cabin UFP concentrations with good accuracy. Our data indicate that under certain conditions, in-cabin UFP exposures incurred during tunnel travel may contribute significantly to daily exposure. The UFP exposure of automobile occupants appears strongly related to their choice of ventilation setting and vehicle.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Public Health Publications
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Citation counts: TR Web of Science Citation Count  Cited 33 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 07 Jan 2013, 09:00:49 EST by Luke Knibbs on behalf of Examinations