Hughes, BR and Mak, C-M (2011) A study of wind and buoyancy driven flows through commercial wind towers. Energy and Buildings, 43 (10). 1784 - 1791. ISSN 0378-7788
Abstract
Commercial wind towers have been the focus of intensive research in terms of their design and performance. There are two main forces which drive the flow through these devices, external wind and buoyancy due to temperature difference. This study examines the relationship between these two forces and the indoor ventilation rate achieved. The work uses Computational Fluid Dynamics (CFD) Modeling to isolate and investigate the two forces and draw comparisons. The study found that as expected the external driving wind is the primary driving force providing 76% more internal ventilation than buoyancy driven flow, which is deemed secondary. Moreover the study found that the effect of buoyancy is insignificant without an external airflow passage other than the wind tower itself. The addition of an external airflow passage such as a window in combination with buoyancy force increased the indoor ventilation by 47%. Therefore the careful positioning of windows in conjunction with internal heat source has the potential to overcome the lack of external wind driven forces in dense urban environments.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2011, Elsevier. NOTICE: this is the author’s version of a work that was accepted for publication in Energy and Buildings. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy and Buildings, 43, 10, 2010, 10.1016/j.enbuild.2011.03.022 |
Keywords: | Wind Tower; CFD; buoyancy; urban environment; indoor ventilation |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) > Institute for Resilient Infrastructure (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 31 Jul 2014 11:20 |
Last Modified: | 31 Jul 2014 11:20 |
Published Version: | http://dx.doi.org/10.1016/j.enbuild.2011.03.022 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.enbuild.2011.03.022 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:79898 |