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Field Study of Local Exhaust Hood Performance. Revised Final Report, February 19, 1996.

PB97156673

Publication Date	1996
Personal Author	Conroy, L. M.; Prodans, R.; Lachman, M.; Yu, X.
Page Count	218
Abstract	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 crassdrafts 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.
Keywords	Degreasers Solvent vapors Exhaust ventilation Air pollution control Air flow Control technology Chicago(Illinois) Organic solvents Ventilation Training
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	Illinois Univ. at Chicago. School of Public Health.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	See also PB97-104889. Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199714

Field Study of Local Exhaust Hood Performance. Revised Final Report, February 19, 1996.

Field Study of Local Exhaust Hood Performance. Revised Final Report, February 19, 1996.
PB97156673

Publication Date	1996
Personal Author	Conroy, L. M.; Prodans, R.; Lachman, M.; Yu, X.
Page Count	218
Abstract	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 crassdrafts 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.
Keywords	Degreasers Solvent vapors Exhaust ventilation Air pollution control Air flow Control technology Chicago(Illinois) Organic solvents Ventilation Training
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	Illinois Univ. at Chicago. School of Public Health.; National Inst. for Occupational Safety and Health, Cincinnati, OH.
Supplemental Notes	See also PB97-104889. Sponsored by National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type	Technical Report
NTIS Issue Number	199714