Fire Tests of Stairwell-Sprinkler Systems. Final Report.
Fire Tests of Stairwell-Sprinkler Systems. Final
Cooper, L. Y.; O'Neill, J. G.
NBSIR 81-2202; 83 p. April 1981.
Sponsor:Occupational Safety and Health Admin., Washington, DC
Available from: National Technical Information Service
(NTIS), Technology Administration, U.S. Department of
Commerce, Springfield, VA 22161.
1-800-553-6847 or 703-605-6000;
Order number: PB81-205288
sprinkler systems; evaporation cooling; smoke movement;
spray nozzles; stairways
The effect of water curtain or spray nozzle fire
protection of an open stairwell was studied
experimentally. The experimental setup includes a three
story stairtower with a contiguous first story burn
room. The instrumentation used to measure the flow
phenomenology resulting from fire sizes up to 4MW
[13.6(10(6)BTU/hr] with and without sprinkler operation
is described. A model of evaporation cooling of the hot
fire gases as they pass up through the first to second
floor stairwell-sprinkler system component is
introduced. Based on this model the data are analyzed
and correlated for the purpose of identifying both a
cooling and a water usage efficiency for each of the
system components that were tested. Application of
these measured performance characteristics and their
extension to stairwell-sprinkler components of different
geometries and configurations are discussed.