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Title: Use of tracer gas techniques for industrial exhaust hood efficiency evaluation - application of sulfur hexafluoride for hood controlling particulate emissions

Abstract

One of the most commonly used controls of harmful industrial contaminants is a local exhaust hood. The efficiency of this system is defined as the ratio of air contaminant quantity captured by the system per unit time to the total contaminant quantity produced by the process per unit time. A tracer gas technique, using sulfur hexafluoride (SF/sub 6/), has been developed for the efficiency estimation of hoods controlling gaseous or vaporous contaminants. To extend the applicability of this method to hoods controlling particulate contaminants, a relationship between the hood particle capture efficiency and the hood efficiency determined by the tracer gas technique was studied. A particulate tracer was used for the hood efficiency and the data were compared with those obtained by the SF/sub 6/ technique. Both tracers were discharged under the same conditions. Based on a statistical data analysis, described in detail in this paper, a mathematical relationship between the efficiency obtained by both particulate and SF/sub 6/ was obtained for different velocity ratios (discharge velocity to capture velocity). For a hood controlling particles of 3 ..mu..m in diameter, no correction of the hood efficiency data estimated by the SF/sub 6/ technique is required. For larger particles, a correctivemore » factor should be used for modification of the efficiency results obtained by the SF/sub 6/ technique.« less

Authors:
;
Publication Date:
Research Org.:
Robert A. Taft Labs., Cincinnati, OH
OSTI Identifier:
5105038
Resource Type:
Journal Article
Journal Name:
Am. Ind. Hyg. Assoc. J.; (United States)
Additional Journal Information:
Journal Volume: 46:7
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; EXHAUST SYSTEMS; PERFORMANCE TESTING; PARTICULATES; MASS TRANSFER; SULFUR FLUORIDES; AIR; EXHAUST GASES; INDUSTRIAL WASTES; MATHEMATICAL MODELS; FLUIDS; FLUORIDES; FLUORINE COMPOUNDS; GASEOUS WASTES; GASES; HALIDES; HALOGEN COMPOUNDS; PARTICLES; SULFUR COMPOUNDS; TESTING; WASTES; 424000* - Engineering- Pollution Control Equipment- (1980-1989)

Citation Formats

Hampl, V, and Shulman, S. Use of tracer gas techniques for industrial exhaust hood efficiency evaluation - application of sulfur hexafluoride for hood controlling particulate emissions. United States: N. p., 1985. Web. doi:10.1080/15298668591395012.
Hampl, V, & Shulman, S. Use of tracer gas techniques for industrial exhaust hood efficiency evaluation - application of sulfur hexafluoride for hood controlling particulate emissions. United States. doi:10.1080/15298668591395012.
Hampl, V, and Shulman, S. Mon . "Use of tracer gas techniques for industrial exhaust hood efficiency evaluation - application of sulfur hexafluoride for hood controlling particulate emissions". United States. doi:10.1080/15298668591395012.
@article{osti_5105038,
title = {Use of tracer gas techniques for industrial exhaust hood efficiency evaluation - application of sulfur hexafluoride for hood controlling particulate emissions},
author = {Hampl, V and Shulman, S},
abstractNote = {One of the most commonly used controls of harmful industrial contaminants is a local exhaust hood. The efficiency of this system is defined as the ratio of air contaminant quantity captured by the system per unit time to the total contaminant quantity produced by the process per unit time. A tracer gas technique, using sulfur hexafluoride (SF/sub 6/), has been developed for the efficiency estimation of hoods controlling gaseous or vaporous contaminants. To extend the applicability of this method to hoods controlling particulate contaminants, a relationship between the hood particle capture efficiency and the hood efficiency determined by the tracer gas technique was studied. A particulate tracer was used for the hood efficiency and the data were compared with those obtained by the SF/sub 6/ technique. Both tracers were discharged under the same conditions. Based on a statistical data analysis, described in detail in this paper, a mathematical relationship between the efficiency obtained by both particulate and SF/sub 6/ was obtained for different velocity ratios (discharge velocity to capture velocity). For a hood controlling particles of 3 ..mu..m in diameter, no correction of the hood efficiency data estimated by the SF/sub 6/ technique is required. For larger particles, a corrective factor should be used for modification of the efficiency results obtained by the SF/sub 6/ technique.},
doi = {10.1080/15298668591395012},
journal = {Am. Ind. Hyg. Assoc. J.; (United States)},
number = ,
volume = 46:7,
place = {United States},
year = {1985},
month = {7}
}