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Sprinkler Fire Suppression Algorithm for HAZARD.

pdf icon Sprinkler Fire Suppression Algorithm for HAZARD. (363 K)
Evans, D. D.

NISTIR 5254; 21 p. August 1993.

U.S./Japan Government Cooperative Program on Natural Resources (UJNR). Fire Research and Safety. 12th Joint Panel Meeting. October 27-November 2, 1992, Tsukuba, Japan, Building Research Inst., Ibaraki, Japan Fire Research Inst., Tokyo, Japan, 114-120 pp, 1992.

Available from:

National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161.
Telephone: 1-800-553-6847 or 703-605-6000;
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Order number: PB94-103678


sprinklers; fire suppression; hazard analysis; cribs; crib fires; fire protection; algorithms


Measurements of the heat release rate of a fully involved square base wood crib both before and during fire suppression with water spray from commercial sprinklers were used to develop a correlation for the exponential decay time constant of the fire heat release rate from the value at sprinkler actuation. This correlation is the basis for prediction of limits for heat release rates of furnishings during fire suppression. For 0.61 m square base wood cribs that are 0.61 m in height, the time constant varies with spray density. Using this result, the time constant for suppression at a sprinkler spray density of 0.07 mm/s is 410 s.