Field study of air change and flow rate in six automobiles

Knibbs, L. D., de Dear, R. J. and Atkinson, S. E. (2009) Field study of air change and flow rate in six automobiles. Indoor Air, 19 4: 303-313. doi:10.1111/j.1600-0668.2009.00593.x


Author Knibbs, L. D.
de Dear, R. J.
Atkinson, S. E.
Title Field study of air change and flow rate in six automobiles
Journal name Indoor Air   Check publisher's open access policy
ISSN 0905-6947
1600-0668
Publication date 2009-08
Sub-type Article (original research)
DOI 10.1111/j.1600-0668.2009.00593.x
Volume 19
Issue 4
Start page 303
End page 313
Total pages 11
Place of publication Malden, MA, United States
Publisher Wiley-Blackwell
Language eng
Abstract For many people, a relatively large proportion of daily exposure to a multitude of pollutants may occur inside an automobile. A key determinant of exposure is the amount of outdoor air entering the cabin (i.e. air change or flow rate). We have quantified this parameter in six passenger vehicles ranging in age from 18 years to <1 year, at three vehicle speeds and under four different ventilation settings. Average infiltration into the cabin with all operable air entry pathways closed was between 1 and 33.1 air changes per hour (ACH) at a vehicle speed of 60 km-h, and between 2.6 and 47.3 ACH at 110 km-h, with these results representing the most (2005 Volkswagen Golf) and least air-tight (1989 Mazda 121) vehicles, respectively. Average infiltration into stationary vehicles parked outdoors varied between ∼0 and 1.4 ACH and was moderately related to wind speed. Measurements were also performed under an air recirculation setting with low fan speed, while airflow rate measurements were conducted under two non-recirculate ventilation settings with low and high fan speeds. The windows were closed in all cases, and over 200 measurements were performed. The results can be applied to estimate pollutant exposure inside vehicles.
Keyword Air change rate
Ventilation
Automobile
Vehicle
Exposure
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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Created: Mon, 07 Jan 2013, 08:59:18 EST by Luke Knibbs on behalf of Examinations