Wind effects on performance of static smoke exhaust systems: Horizontal ceiling vents

Wan Ki Chow, J. Li

Research output: Journal article publicationConference articleAcademic researchpeer-review

9 Citations (Scopus)


For static smoke exhaust systems, such as horizontal ceiling vents, buoyancy of the smoke layer is the driving force for smoke removal. However, wind effect should also be considered, as the smoke layer interface height can be raised up or pulled down, depending on the conditions. Key equations on calculating the smoke exhaust rates and the required vent area will be reviewed first in this paper. Modifications of those equations with wind effects are discussed. An atrium is taken as an example to study the wind effects under two scenarios: a fire at the atrium floor to give an axisymmetric plume and a fire at a shop adjacent to the atrium to give a balcony spill plume.
Original languageEnglish
Article number4740
Pages (from-to)479-488
Number of pages10
JournalASHRAE Transactions
Volume110 PART II
Publication statusPublished - 1 Dec 2004
EventTechnical and Symposium Papers - 2004 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers - Nashville, TX, United States
Duration: 26 Jun 200430 Jun 2004

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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