Abstract
The effectiveness of fire detection systems and fire mitigation strategies can be related to three distinct time lags associated with building fires: a transport time lag, a detection time lag, and a suppression time lag. The impacts of these lag periods on fire detection and suppression are developed. Transport lag periods are considered in terms of available correlations of fire plume and ceiling jet data, detection lag periods in terms of available heat detector response models that use these data correlations. Suppression lags are developed in terms of expected response times for automatic and manual suppression. Example calculations are presented.
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References
Alpert, R.L., “Calculation of Response Time of Ceiling-mounted Fire Detectors,”Fire Technology,8, 1972, pp. 181–195.
Heskestad, G. and Delichatsios, M.A., “The Initial Convective Flow in Fire,”Seventeenth Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, pp. 1113–1123.
Alpert, R.L. and Ward, E.J., “Evaluation of Unsprinklered Fire Hazards,”Fire Safety Journal,7, 1984, pp. 127–143.
Beyler, C.L., “Fire Plumes and Ceiling Jets,”Fire Safety Journal 11, 1986, pp. 53–75.
Morton, B.R., Taylor, J.S., and Turner, G.I., “Turbulent Gravitational Convection from Maintained and Instantaneous Sources,”Proceedings of the Royal Society, Vol. A234, London, 1956, pp. 1–23.
Alpert, R.L., “Turbulent Ceiling Jets Induced by Large-Scale Fires,”Combustion Science and Technology,11, 1975, pp. 197–213.
Beyler, C.L., “A Design Method for Flaming Fire Detection,”Fire Technology,20, No. 4, 1984, pp. 5–16.
Heskestad, G. and Delichatsios, M.A., “Update: The Initial Convective Flow in Fire,” to appear inFire Safety Journal.
Tewarson, A., “Generation of Heat and Chemical Compounds in Fires,”The SFPE Handbook of Fire Protection Engineering (P.J. DiNenno, Editor-in-Chief), National Fire Protection Association, Quincy, MA, 1988, pp. 1-179 – 1-199.
Johnson, J.E., “Concepts of Fire Detection,” Pyrotronics, Inc., Cedar Knolls, NJ, 1970, p. 1.
Newman, J.S., “Principles for Fire Detection,”Fire Technology,24, No. 2, 1988, pp. 116–127.
Newman, J.S., “Prediction of Fire Detector Response,”Fire Safety Journal,12, 1987, pp. 205–211.
Evans, D.D., and Stroup, D.W., “Methods to Calculate the Response Time of Heat and Smoke Detectors Installed Below Large Unobstructed Ceilings,”Fire Technology,22, No. 1, 1985, pp. 54–65.
Stroup, D.W. and Evans, D.D., “Use of Computer Fire Models for Analyzing Thermal Detector Spacing,”Fire Safety Journal, 14, 1988, pp. 33–45.
Heskestad, G. and Smith, H.F., “Investigation of a New Sprinkler Sensitivity Approval Test: The Plunge Test,”Technical Report Serial No. 22485. RC 76-T-50, Factory Mutual Research Corp., Norwood, MA, 1976.
Standard for the Installation of Sprinkler Systems,NFPA 13-1987, National Fire Protection Association, Quincy, MA, 1987.
“Automatic Sprinkler Performance Tables, 1970 Edition,”Fire Journal,64, No. 4, 1970.
Standard on Automatic Fire Detectors,NFPA 72E-1987, National Fire Protection Association, Quincy, MA, 1987.
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Mowrer, F.W. Lag times associated with fire detection and suppression. Fire Technol 26, 244–265 (1990). https://doi.org/10.1007/BF01040111
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DOI: https://doi.org/10.1007/BF01040111