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Development of Optimized Diffuser and Spray Fan Systems for Coal Mine Face Ventilation.

Authors
Wallhagen-RE
Source
NTIS: PB 277 987 Available for Reference At Bureau Libraries :256 pages
Link
NIOSHTIC No.
10000772
Abstract
The objective was to determine configurations for a diffuser fan system and water spray (spray fan) system that will provide a maximum reduction in face methane concentrations without causing an increase in methane concentrations at the operator's position. A limited study was also performed to assess the effect of scrubber discharge location on methane concentrations in the face area. The results indicate that diffuser fan and spray fan systems that were designed to augment the natural airflow pattern in the entry could provide a factor of 3 to 5 reduction in average methane concentration at the face, compared with a mining machine with just conventional water sprays. The properly designed diffuser and spray fan systems also significantly reduced the total methane present in the entry. A properly designed dust scrubber discharge can reduce face methane levels by a factor of 2.
Publication Date
19770101
Document Type
CP; Final Contract Report;
Fiscal Year
1977
NTIS Accession No.
PB-277987
NTIS Price
A13
Identifying No.
OFR 14-78
NIOSH Division
PRC;
Source Name
NTIS: PB 277 987 Available for Reference At Bureau Libraries
Performing Organization
Foster-Miller Associates
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