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	Effect of particle spatial distribution on particle deposition in ventilation rooms
	Zhao, Bin ; Wu, Jun
	2010-10-12 ; 2010-10-12
关键词	Ventilation Indoor air quality (IAQ) Aerosol Particle Deposition AIR-FLOW SIMULATION INDOOR ENVIRONMENTS RATES INDOORS DECAY-RATES MODEL SYSTEM POLLUTION SURFACES CHAMBER Engineering, Environmental Engineering, Civil Environmental Sciences
中文摘要	We used simulations and experimental tests to investigate indoor particle deposition during four commonly used ventilation modes, including ceiling supply, side-up supply, side-down supply and bottom supply. We used a condensation monodisperse aerosol generator to generate fine diethylhexyl sebacate (DEHS) particles of different sizes along with two optical particle counters that measured particle concentration at the exhaust opening and inside a three-dimensional ventilated test room. We then simulated particle deposition using the same ventilation modes with computational fluid dynamics (CFD) method. Our simulated results indicate that mean deposition velocity/rate for particles 0.5-10 mu m (aerodynamic diameter) is not affected by different ventilation modes. However, both our experimental and simulated results indicate that the deposition loss factor, a parameter defined based on mass balance principle to reflect the influence of particle distribution on deposited particle quantity, differ significantly by ventilation mode. This indicates that ventilation plays an important role in determining particle deposition due to the apparent differences in the spatial distribution of particles. The particle loss factor during ventilation modes characterized by upward air flow in the room is smaller than that of mixing ventilation: however this trend was strongly influenced by the relative location of the inlets, outlets and aerosol source. (C) 2009 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/80709]
专题	清华大学
推荐引用方式 GB/T 7714	Zhao, Bin,Wu, Jun. Effect of particle spatial distribution on particle deposition in ventilation rooms[J],2010, 2010.
APA	Zhao, Bin,&Wu, Jun.(2010).Effect of particle spatial distribution on particle deposition in ventilation rooms..
MLA	Zhao, Bin,et al."Effect of particle spatial distribution on particle deposition in ventilation rooms".(2010).

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