Experimental fire tower studies on mechanical pressurization to control smoke movement caused by fire pressures

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ConferenceFire Safety Science - Proceedings of the Second International Symposium of the International Association for Fire Safety Science: 13 June 1988, Tokyo, Japan
Pages761769; # of pages: 9
Subjectsmoke controls; emergency exits; pressurization; fire safety; smoke control system design; fire escape route protection; adverse pressure differences; buoyancy force; thermal expansion; fire safe elevators; smoke control; Fire
AbstractIn designing a mechanical smoke control system to protect escape routes, it is necessary to have information on the adverse pressure differences caused by the various mechanisms and on the level of mechanical pressurization needed to overcome them. This paper deals with pressure differences caused by both the buoyancy force and thermal expansion due to fire. The tests were conducted in the ten- storey experimental fire tower in conjunction with a project on smoke control technology for a fire safe elevator. The calculated values of adverse pressure differences across the elevator shaft walls caused by the buoyancy force agreed well with the measured values, for fire temperatures from 450 to 850 deg C. Also, the minimum amounts of mechanical pressurization required for neutralization were equal to the adverse pressures caused by the buoyancy force. Those caused by thermal expansion due to the rapid temperature rise were determined with the outside wall vents closed and with them opened. The test results verified that adverse pressures caused by fire can be controlled by mechanical pressurization to prevent smoke contamination of protected spaces. The mechanical pressurization system should be operated as soon as possible as the purging time for a contaminated elevator shaft or lobby can be long.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number30418
NPARC number20375733
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Record identifiercf6d1958-4624-4a73-8117-2aa8abcdd99c
Record created2012-07-23
Record modified2016-05-09
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