Modeling Breathing-Zone Concentrations of Airborne Contaminants Generated During Compressed Air Spray Painting

Details

• Personal Author:
  Blazicko BA ; Carlton GN ; Dunn, Kevin H. ; Flynn MR ; Gatano BL ; McKernan JL
• Description:
  This paper presents a mathematical model to predict breathing-zone concentrations of airborne contaminants generated during compressed air spray painting in cross-flow ventilated booths. The model focuses on characterizing the generation and transport of overspray mist. It extends previous work on conventional spray guns to include exposures generated by HVLP guns. Dimensional analysis and scale model wind-tunnel studies are employed using non-volatile oils, instead of paint, to produce empirical equations for estimating exposure to total mass. Results indicate that a dimensionless breathing zone concentration is a nonlinear function of the ratio of momentum flux of air from the spray gun to the momentum flux of air passing through the projected area of the worker's body. The orientation of the spraying operation within the booth is also very significant. The exposure model requires an estimate of the contaminant generation rate, which is approximated by a simple impactor model. The results represent an initial step in the construction of more realistic models capable of predicting exposure as a mathematical function of the governing parameters. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Movements Air Pollutants, Occupational Dust Inhalation Exposure Occupational Exposure Occupational Health Paint Safety Ventilation
• Keywords:
  Aerosol Particles Airborne Dusts Airborne Particles Air Contamination Air Flow Author Keywords: Exposure Modeling Dimensional Analysis Fluid Mechanics Inhalants Mathematical Models Models Occupational Exposure Painters Paint Spraying Spray- Painting Spraying Booths Spray Painting Transfer Efficiency

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• ISSN:
  0003-4878
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  North Carolina ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  67-76
• Volume:
  43
• Issue:
  1
• NIOSHTIC Number:
  nn:20024446
• Citation:
  Ann Occup Hyg 1999 Jan; 43(1):67-76
• Contact Point Address:
  Michael R. Flynn, Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, NC 16488-6399, U.S.A.
• Federal Fiscal Year:
  1999
• Performing Organization:
  University of North Carolina Chapel Hill, Chapel Hill, North Carolina
• Peer Reviewed:
  True
• Start Date:
  19950930
• Source Full Name:
  Annals of Occupational Hygiene
• End Date:
  19990929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:6424a06482b9f0778fdfadae9cde43f0d8a37cf4a53a00fddf41921e3166a3b7f8b969f167dea6b74c66428fa68e0b9e8341b7b249a7bf6fefb4e58f0abcc787
• Download URL:
  https://stacks.cdc.gov/view/cdc/196248/cdc_196248_DS1.pdf
• File Type:
  [PDF - 412.65 KB ]