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Predicting Smoke and Carbon Monoxide Detector Response in the Ceiling Jet in the Presence of a Smoke Layer.


pdf icon Predicting Smoke and Carbon Monoxide Detector Response in the Ceiling Jet in the Presence of a Smoke Layer. (401 K)
Davis, W. D.; Cleary, T. G.; Donnelly, M. K.; Hellerman, S. D.

NISTIR 6976; 35 p. July 2003.

Keywords:

smoke detectors; carbon monoxide; detector response; ceiling jets; smoke layers; algorithms; experiments; fire models

Abstract:

An algorithm for predicting smoke or carbon monoxide concentration in the ceiling jet in the presence of a smoke layer is developed. The analysis will be restricted to fires that produce turbulent plumes and can be represented by axisymmetric point sources. The predictions of the algorithm for smoke and carbon monoxide are compared with experiments. Once the smoke or carbon monoxide concentration in the ceiling jet is predicted, the activation times for detectors can be calculated using a model for detector activation.