Field Study of Local Exhaust Hood Performance, Revised Final Report

Details

• Personal Author:
  Conroy LM ; Lachman M ; Prodans R ; Yu X
• Description:
  A field study was performed to determine the performance of slot hoods used to exhaust vapor degreasers. Sixteen degreasers were used in the study. The objectives were to measure capture efficiency of local exhaust hoods used to control vapor degreasing tanks during normal operations, to measure crossdrafts in the vicinity of the vapor degreasing tanks, to use the measured crossdrafts and hood and source parameters to predict capture efficiency using a particular model, to compare predicted and measured capture efficiency, and to compare measured capture efficiencies and crossdrafts with observed degreaser activities. Local exhaust and general ventilation flow rates along with the physical dimensions of the work space and the degreaser were measured. There appeared to be reasonably good agreement between predicted and measured capture efficiency. However, poor agreement was obtained between predicted and measured efficiency for the interval efficiencies for each degreaser which could be due to turbulence, the effects of the cooling condenser on the degreaser, solvent being carried out of the degreaser to areas where the hood could not be expected to capture contaminants, and the variability in emission rate due to degreaser activity being inadequately taken into account in the predictive capture efficiency model. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety Solvents Staff Development Ventilation
• Keywords:
  Control-technology NIOSH-Grant Organic-solvents Solvent-vapor-degreasing Solvent-vapors Training Ventilation-systems
• Series:
  Grant Final Reports
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  Illinois ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OEP - Office of Extramural Programs
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-205
• NIOSHTIC Number:
  nn:00235392
• NTIS Accession Number:
  PB97-156673
• Citation:
  Environmental and Occupational Health Sciences, School of Public Health, University of Illinois, Chicago, Illinois 1996 Feb; :1-205
• Contact Point Address:
  Occupational and Environ Med University of Illinois 2035 W Taylor Street Chicago, Ill 60612
• Federal Fiscal Year:
  1996
• Performing Organization:
  University of Illinois at Chicago, Chicago, Illinois
• Peer Reviewed:
  False
• Start Date:
  19770930
• Source Full Name:
  Environmental and Occupational Health Sciences, School of Public Health, University of Illinois, Chicago, Illinois
• End Date:
  19960630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d4da9681fb7675051819beab559e3a3eb3609b4be66c2e9d1c6e9a61c233fc09dc1b89edeaae4b7119bf07447b1f5ddad393011104bb3ca0e7a2770302e128a9
• Download URL:
  https://stacks.cdc.gov/view/cdc/217898/cdc_217898_DS1.pdf
• File Type:
  [PDF - 7.24 MB ]