@article{ref1,
title="On the operation time of horizontal ceiling vent in an atrium",
journal="Journal of fire sciences",
year="2002",
author="Li, Y. Z. and Huo, R. and Chow, W. K.",
volume="20",
number="1",
pages="37-51",
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.<p /><p>Language: en</p>",
language="en",
issn="0734-9041",
doi="10.1177/0734904102020001831",
url="http://dx.doi.org/10.1177/0734904102020001831"
}