On the operation time of horizontal ceiling vent in an atrium

Y. Z. Li, R. Huo, Wan Ki Chow

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


Smoke control by a horizontal ceiling vent in an atrium is studied in this paper. A bi-directional airflow moving upward and downward across the vent might be observed and this would affect the efficiency of smoke extraction. Whether the flow is bi-directional or uni-directional depends on the pressure difference across the vent upon activation. Before opening the horizontal ceiling vent, the pressure difference should be higher than a critical value. Thickness of the smoke layer formed under the ceiling before opening the vent is found to be important. The required smoke layer thickness for getting such a critical pressure is discussed in this paper. Two situations of no temperature difference between the inside and outside of the atrium; and the outside temperature is higher than the inside temperature, are considered.
Original languageEnglish
Pages (from-to)37-51
Number of pages15
JournalJournal of Fire Sciences
Issue number1
Publication statusPublished - 1 Jan 2002

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'On the operation time of horizontal ceiling vent in an atrium'. Together they form a unique fingerprint.

Cite this