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	Effect of ventilation duct as a particle filter
	Wu, Jun ; Zhao, Bin
	2010-05-11 ; 2010-05-11
关键词	particle penetration deposition ventilation duct indoor air quality (IAQ) DEVELOPED TURBULENT-FLOW DEPOSITION SURFACES SMOOTH Construction & Building Technology Engineering, Environmental Engineering, Civil
中文摘要	This paper discusses the effect of ventilation duct as a particle filter by modeling particle deposition in ventilation ducts, which is the reason that ventilation ducts could "filter" particles. An Eulerian model is employed to predict the particle deposition velocity onto the wall and floor from fully developed turbulent flow in ventilation ducts [Zhao B, Wu J. Modeling particle deposition from fully developed turbulent flow in ventilation duct. Atmospheric Environment 2006;40:457-66], while an empirical equation is proposed to predict the particle deposition velocity onto the ceiling combined with experimental data and, another empirical equation by McFarland et al. [Aerosol deposition in bends with turbulent flow. Environmental Science and Technology 1997;31:3371-7] is used for predicting the particle penetration through the bends, which are hard to analyze by theoretical method. Losses through ventilation duct are thus evaluated for the particle size range 0.01-100 mu m. Both straight duct (implies fully developed turbulent flow) and duct bend (implies developing turbulent flow) cases are analyzed. Then particle penetration through the supply duct of a swimming pool, including some straight ducts and bends, is analyzed as an application case. The results show that when particle diameter is larger than 5 pm, the filtration of the duct might not be ignored as the obvious loss by deposition. (c) 2006 Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/26011]
专题	清华大学
推荐引用方式 GB/T 7714	Wu, Jun,Zhao, Bin. Effect of ventilation duct as a particle filter[J],2010, 2010.
APA	Wu, Jun,&Zhao, Bin.(2010).Effect of ventilation duct as a particle filter..
MLA	Wu, Jun,et al."Effect of ventilation duct as a particle filter".(2010).

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