Author: Sun, Qian
Title: Wind effects on atrium smoke exhaust by ceiling vent
Advisors: Chow, W. K. (BSE)
Degree: M.Eng.
Year: 2017
Subject: Hong Kong Polytechnic University -- Dissertations
Air flow
Atrium buildings -- Fires and fire prevention
Department: Department of Building Services Engineering
Pages: 75 pages : color illustrations
Language: English
Abstract: According to statistics, more than 80 percent of death related to smoke. In recent years, atriums in growing numbers are built for alleviating the construction pressure. When fire occurs, smoke would rise up to high floors easily and cause another fire, because atriums are large space buildings and lack of compartmentalization. When an atrium is located in crowded urban areas, there are many supertall buildings around it. If a strong wind blows toward a building, performance of the natural vents may be affected. Wind might push the smoke into the atrium which causes smoke cannot be exhausted from the static vents. The model with difference distance between building and vertical wall was examined. At the same time, the scenario on an atrium without an adjacent vertical wall was also be texted. Results on the whole building pressure distribution, smoke velocity change and smoke exhaust rate across the vent with different wind speeds are compared. In most instances, wind would have positive effect on the performance of smoke exhaust. And wind velocity and the distance between the vertical wall and the atrium. However, in a particular situation, wind speed of 20m/s under a 3MW fire, smoke cannot be exhausted by the natural vent.
Rights: All rights reserved
Access: restricted access

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