Investigation on Lowering Commuters’ In-Cabin Exposure to Ultrafine Particles

Details

• Personal Author:
  Xu B ; Zhu Y
• Description:
  To determine ways to reduce commuters' ultrafine particle exposure, factors such as ventilation condition, mechanical airflow rate, driving speed, cabin air filter quality, and cabin air filter use are examined. The results show that the in-cabin to on-roadway ratio is reduced by 20% when the fan is set to recirculation-on versus when set to recirculation-off because fewer ultrafine particles are exchanged between the inside and outside of the cabin. Also, when the fan is set to recirculation-off, the ratio is reduced by 40% at lower mechanical airflow rates. The thickest cabin air filter resulted in a 30% in-cabin to on-roadway ratio decrease compared with the thinnest. Thus, driving conditions with the least UFP in-cabin to on-roadway ratio is when a vehicle is operating with a high efficiency cabin filter, the ventilation set to fan-on and recycling is recirculation on, and at a high ventilation airflow rate. Furthermore, recirculating in-cabin air through a high efficiency particulate air filter was found to significantly reduce in-cabin UFP exposure. [Description provided by NIOSH]
• Subjects:
  Air Pollution Occupational Health Particulate Matter Safety Transportation Ventilation
• Keywords:
  Air Filters Air Pollution Author Keywords: Ultrafine Particles Automotive Emissions Driving Conditions In-cabin Emissions Particulates Ultrafine Particles Vehicular Emissions
• ISSN:
  1361-9209
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  California ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  122-130
• Volume:
  18
• NIOSHTIC Number:
  nn:20055814
• Citation:
  Transp Res D Transp Environ 2013 Jan; 18:122-130
• Contact Point Address:
  Yifang Zhu, Department of Environmental Health Sciences, University of California Los Angeles, 650 Charles E. Young Drive S., Los Angeles, CA 90095, USA
• Email:
  yifang@ucla.edu
• Federal Fiscal Year:
  2013
• Performing Organization:
  University of California Los Angeles
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Transportation Research Part D: Transport and Environment
• End Date:
  20270630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:be7f9a725749044c4956233581bfb1ce54e3ece882856595315612db23510583de8ed36ce7d7e70539d5e4d2025d1bf7dd454eb92b2e3a11325d4947421228cf
• Download URL:
  https://stacks.cdc.gov/view/cdc/213582/cdc_213582_DS1.pdf
• File Type:
  [PDF - 275.90 KB ]