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Title: The performance of automatic sprinkler systems in the extinguishment of incipient conveyor belt fires under ventilated conditions

The U.S. Bureau of Mines conducted a study to evaluate the effectiveness of automatic water sprinkler systems in the extinguishment of incipient conveyor belt fires under ventilated conditions. Large-scale experiments were conducted using a double strand conveyor belt configuration. Standard response, pendent-type sprinklers, with activation temperatures of 100{degrees}C, were installed above and between the two strands of belting, in accordance with Federal standards for sprinkler system installations in belt drive areas. Experiments at airflows of 1.1 and 4.6 m/s showed that the sprinklers activated later, the peak heat release rate was larger, and more belting was consumed at the higher airflow. In experiments with 74{degrees}C, fast response, directional sprinklers, the sprinklers activated at the same heat release rate for both high and low Wows, but the peak heat release rate and amount of belt consumed was slightly higher at the lower airflow. Experiments were also conducted with 100{degrees}C, standard pendent sprinklers installed above the top belt, in accordance with the National Fire Protection Association (NFPA) Standard 123 for sprinkler system installations in conveyor belt drive areas in underground coal mines. In these experiments, the heat release rate and amount of belting consumed was larger at the higher airflow.
Authors:
; ;  [1]
  1. Dept. of the Interior, Pittsburgh, PA (United States)
Publication Date:
OSTI Identifier:
269228
Report Number(s):
CONF-9506227--
TRN: 96:001467-0035
Resource Type:
Conference
Resource Relation:
Conference: 7. U.S. mine ventilation symposium, Lexington, KY (United States), 5-7 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the 7th US mine ventilation symposium; Wala, A.M.; PB: 525 p.
Publisher:
Society for Mining, Metallurgy, and Exploration, Inc., Littleton, CO (United States)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL MINES; BELT CONVEYORS; FIRES; FIRE EXTINGUISHERS; PERFORMANCE; VENTILATION