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Mine fire detection in the presence of diesel emissions.

Authors
Edwards-JC; Franks-RA; Friel-GF; Lazzara-CP; Opferman-JJ
Source
Proceedings of the Eighth US Mine Ventilation Symposium, Rolla, Missouri, June 11-17, 1999. Rolla, MO: University of Missouri-Rolla, Press, 1999 Jun; :295-301
Link
NIOSHTIC No.
20024560
Abstract
A series of four coal combustion experiments was conducted at the National Institute for Occupational Safety and Health's (NIOSH) Pittsburgh Research Laboratory (PRL) in the Safety Research Coal Mine (SRCM) to evaluate the response of fire sensors to a small 0.61 m square smoldering coal fire which transitions to flaming combustion in the presence of diesel emissions. An optical path smoke sensor alarmed earlier than a point type diffusion mode ionization smoke sensor, which alarmed prior to a CO alert value of 5 PPM above ambient. The presence of steady state diesel emissions resulted in a decrease in the optical smoke sensor analog output voltage signal by less than 1.4 pct for the three coal fire experiments in which a diesel engine was operating, whereas the ionization smoke sensor output decreased between 10.8 and 26.7 pct after the initial surge of the diesel engine. A commercial diesel discriminating fire sensor did not alarm for a fire in the one experiment for which it was used. The results of the experiments demonstrated that an optical path smoke sensor might be used to detect a coal fire under the experimental conditions considered of starting a diesel engine followed by a slowly developing coal fire.
Keywords
Mining-industry; Underground-mining; Coal-mining; Diesel-emissions; Diesel-engines; Mine-fires; Coal-gas; Coal-dust; Coal-miners; Combustion-products; Combustible-materials; Combustible-gases; Combustibility; Diesel-emissions; Fire-protection; Fire-prevention; Fire-extinguishing-systems; Ionization; Optics; Optic-system; Smoke-control
Contact
NIOSH, Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
CAS No.
124-38-9
Publication Date
19990611
Document Type
Conference/Symposia Proceedings
Editors
Tien-JC
Fiscal Year
1999
NTIS Accession No.
NTIS Price
ISBN No.
1887009043
NIOSH Division
PRL
Source Name
Proceedings of the Eighth US Mine Ventilation Symposium, Rolla, Missouri, June 11-17, 1999
State
PA; MO
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