A CFD study of Hong Kong refuge floor design : floor height effect

Cheng, Charles Chor Kwan, Leung, Andrew Yee Tak, Lam, Kit Ming, Demirbilek, Nur, & Williamson, Brian J. (2010) A CFD study of Hong Kong refuge floor design : floor height effect. Engineering Applications of Computational Fluid Mechanics, 4(3), pp. 425-433.

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Since 1996, ther provision of a refuge floor has been a mandatory feature for all new tall buildings in Hong Kong. These floors are designed to provide for building occupants a fire safe environment that is also free from smoke. However, the desired cross ventilation on these floors to achieve the removal of smoke, assumed by the Building Codes of Hong Kong, is still being questioned so that a further scientific study of the wind-induced ventilation of a refuge fllor is needed. This paper presents an investigation into this issue. The developed computational technique used in this paper was adopted to study the wind-induced natural ventilation on a refuge floor. The aim of the investigation was to establish whether a refuge floor with a cetnral core and having cross ventilation produced by only two open opposite external side walls on the refuge floor would provide the required protection in all situations taking into account behaviour of wind due to different floor heights, wall boundary conditions and turbulence intensity profiles. The results revealed that natural ventilation can be increased by increasng the floor heigh provided the wind angle to the building is less than 90 degrees. The effectiveness of the solution was greatly reduced when the wind was blowing at 90 degrees to the refuge floor opening.

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2 citations in Web of Science®
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ID Code: 38278
Item Type: Journal Article
Refereed: Yes
Additional Information: An open access copy of this article is freely available from the publisher's website - see "Official URL" above.
Keywords: Refuge Floor Design, Wind-induced Natural Ventilation, High-rise Building Safety
ISSN: 1994-2060
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Design
Copyright Owner: Copyright 2010 CSE Department of Hong Kong Polytechnic University
Deposited On: 01 Nov 2010 23:14
Last Modified: 06 Nov 2014 12:46

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