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Water mist suppression of fires in underground diesel fuel storage areas.

Authors
Smith-AC; Lazzara-CP
Source
Annual Conference on Fire Research, 1998 Oct; :111-112
Link
NIOSHTIC No.
20000140
Abstract
A fire risk associated with mobile diesel-powered equipment in underground mines is the storage and transfer of large quantities of diesel fuel in underground storage areas. Research by the Pittsburgh Research Laboratory (PRL) and others has shown that water mist technology, developed as a replacement for above ground halon extinguishing systems, may be applicable for fighting diesel fuel fires. The National Institute for Occupational Safety and Health/PRL is investigating the application of the technology for controlling and extinguishing fires in underground mines. A large-scale fire suppression test facility was constructed to simulate an underground fuel storage area. Experiments were conducted to determine the relationship between the extinguishing effectiveness of water mist and the drop size and distribution and the location, geometry, and size of the fire for restricted diesel fuel fires. A large-scale fire suppression facility was constructed to simulate an underground diesel fuel storage area. Experiments were conducted to determine the relationship between the extinguishing effectiveness of water mist and the droplet size and distribution and the location, geometry, and size of the fire for restricted diesel fuel fires. The results indicated that the extinguishing effectiveness of the water mist decreased with increasing droplet diameter. The optimum droplet size was between 200 and 400 micrometers, independent of pressure, flow rate, nozzle type, fire location, and fire size.
Keywords
Fire-fighting; Fire-extinguishing-systems; Mine-fires; Underground-mining; Mining-industry; Mine-safety
Contact
National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, Pittsburgh, PA 15236
Publication Date
19981001
Document Type
Conference/Symposia Proceedings
Editors
Beall-KA
Fiscal Year
1999
NTIS Accession No.
PB99-102519
NTIS Price
A02
NIOSH Division
PRL
Priority Area
Other Occupational Concerns
Source Name
Annual Conference on Fire Research NISTIR 6242
State
MD; PA
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