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Simplified method for designing a mechanical smoke exhaust system for high-rise buildings

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada
FormatText, Article
Subjectsmoke controls; smoke vents; exhaust fans; dampers; high rise buildings; bouche de fumée; ventilateur aspirant; clapet de ventilation; venting; exhaust fans; dampers; total pressure loss; exhaust rate; Smoke management
Abstract
Venting is an effective way to prevent smoke from spreading from a fire area into escape routes and upper floors of high- rise buildings. A smoke exhaust system consists of a vertical shaft with dampered openings on each floor ( normally closed) and an exhaust fan at the top of the shaft. In the event of fire, the damper on the fire floor is opened and the exhaust fan operated to vent the fire floor. This induces air from the surrounding spaces to flow into the fire floor enclosure and the smoke to exit through the exhaust shaft to outdoors. Such a system requires the proper size of smoke shaft and exhaust fan capacity. A simplified design procedure and example calculations are presented. Measured and calculated values are in good agreement for total pressure loss and exhaust rate of a smoke exhaust system for a 34-story office building.
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  • ASHRAE Transactions 91, no. 2A: 642–656.
NotePresented at the 1985 ASHRAE Annual Meeting, Honolulu, HI, USA, June 23-26, 1985
LanguageEnglish
Peer reviewedYes
IdentifierIRC-P-1401
NRC numberNRCC 26341
NRC-IRC-3935
NPARC number20375851
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Record identifiera37cb156-d5ed-4b85-a196-ad7e23c23849
Record created2012-07-23
Record modified2020-06-06
Date modified: