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Mining Publication: Key Design Factors of Enclosed Cab Dust Filtration Systems
Keywords: Cabs Filtration systems Numerical modeling Silica dust Surface mining
Original creation date: November 2008
Authors: JA Organiscak, AB Cecala
Report of Investigations - November 2008
Download PDF Document (0.88 MB)
NIOSHTIC2 Number: 20034707
Pittsburgh, PA: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 2009-103, RI 9677 2008 Nov; :1-43
Enclosed cabs are a primary means of reducing the silica dust exposure of equipment operators at surface mines. The National Institute for Occupational Safety and Health experimentally investigated various factor effects on cab air filtration system performance. The factors investigated were intake filter efficiency, intake air leakage, intake filter loading (filter flow resistance), recirculation filter use, and wind effects on cab particulate penetration. Adding an intake pressurizer fan to the filtration system was also investigated. Results indicate that intake filter efficiency and recirculation filter use were the two most influential factors on cab penetration performance. Use of the recirculation filter reduced cab penetration by usually an order of magnitude over the intake air filter alone because of the multiplicative filtration of the cab interior air. Intake air leakage and filter loading affected the cab penetration to a lesser extent, while wind had the least impact on cab penetration between the calm and 10-mph wind velocities tested. Adding an intake pressurizer fan notably increased intake airflow and cab pressure with only minor changes to cab penetration. A mathematical model was developed that describes cab penetration in terms of intake filter efficiency, intake air quantity, intake air leakage, recirculation filter efficiency, recirculation filter quantity, and wind penetration.
Image of publication Key Design Factors of Enclosed Cab Dust Filtration SystemsReport of Investigations - November 2008
Download PDF Document (0.88 MB)
NIOSHTIC2 Number: 20034707
Pittsburgh, PA: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 2009-103, RI 9677 2008 Nov; :1-43
See Also
Clearing the Air
Current NIOSH Dust Control Research for Noncoal Surface Mines
Doing the Math: The Effectiveness of Enclosed-Cab Air-Cleaning Methods Can Be Spelled Out in Mathematical Equations
Laboratory Investigation of Enclosed Cab Filtration System Performance Factors
Maximizing Air Quality Inside Enclosed Cabs with a Unidirectional Filtration and Pressurization System
A New Concept for Leak Testing Environmental Enclosure Filtration Systems
A New Leak Test Method for Enclosed Cab Filtration Systems
NIOSH Hazard Controls 27 - New Shroud Design Controls Silica Dust from Surface Mine and Construction Blast Hole Drills
Respirable Dust
Technology News 528 - Recirculation Filter Is Key to Improving Dust Control in Enclosed Cabs
Workplace Solutions: Reducing Hazardous Dust in Enclosed Operator Cabs During Construction
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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