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Field study of air change and flow rate in six automobiles

Knibbs, Luke D., deDear, Richard, & Atkinson, Steven E. (2009) Field study of air change and flow rate in six automobiles. Indoor Air, 19(4), pp. 303-313.

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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.

Impact and interest:

16 citations in Scopus
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11 citations in Web of Science®

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ID Code: 48405
Item Type: Journal Article
Keywords: Air change rate, Ventilation, Automobile, Vehicle, Exposure
DOI: 10.1111/j.1600-0668.2009.00593.x
ISSN: 1600-0668
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ENVIRONMENTAL ENGINEERING (090700)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Past > Schools > Physics
Copyright Owner: Copyright 2009 The Authors. Journal compilation © 2009 John Wiley & Sons A/S
Deposited On: 03 Feb 2012 09:04
Last Modified: 04 Feb 2012 11:25

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