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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
J Mine Vent Soc S Afr 2000 Apr; 53(2):66-71
NIOSHTIC No.
20022806
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 diesle engine followed by a slowly developing coal fire.
Keywords
Coal-gas; Coal-dust; Coal-mining; Coal-miners; Combustion-products; Combustible-materials; Combustible-gases; Combustibility; Diesel-emissions; Fire-protection; Fire-prevention; Fire-extinguishing-systems; Ionization; Optics; Optic-system; Smoke-control
CODEN
JMVSA4
CAS No.
630-08-0
Publication Date
20000401
Document Type
Journal Article
Fiscal Year
2000
NTIS Accession No.
NTIS Price
Issue of Publication
2
ISSN
0368-3206
NIOSH Division
PRL
Source Name
Journal of the Mine Ventilation Society of South Africa
State
PA
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