Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33695
Title: On the operation time of horizontal ceiling vent in an atrium
Authors: Li, YZ
Huo, R
Chow, WK 
Issue Date: 2002
Publisher: SAGE Publications
Source: Journal of fire sciences, 2002, v. 20, no. 1, p. 37-51 How to cite?
Journal: Journal of fire sciences 
Abstract: 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.
URI: http://hdl.handle.net/10397/33695
ISSN: 0734-9041
EISSN: 1530-8049
DOI: 10.1177/0734904102020001831
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