Effect of cabin ventilation rate on ultrafine particle exposure inside automobiles
Data(s) |
01/05/2010
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Resumo |
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 airflow(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 (R2 ) 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. |
Identificador | |
Publicador |
American Chemical Society |
Relação |
DOI:10.1021/es9038209 Knibbs, Luke D., deDear, Richard, & Morawska, Lidia (2010) Effect of cabin ventilation rate on ultrafine particle exposure inside automobiles. Environmental Science & Technology (including News & Research Notes), 44(9), pp. 3546-3551. |
Direitos |
Copyright 2010 American Chemical Society |
Fonte |
Faculty of Science and Technology; Institute of Health and Biomedical Innovation; Physics |
Palavras-Chave | #040101 Atmospheric Aerosols #090299 Automotive Engineering not elsewhere classified #Ultrafine Particle #Cabin Ventilation Rate #Passenger Vehicles |
Tipo |
Journal Article |