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residence 2

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Volatile organic compounds (VOCs) 1

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carboxymethylcellulose 1

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Numerical Analysis of the Ventilation of a Kitchen in Residence

Zou Shenghua,Li Ping,Weng Peifen,Luo Yixin

Strategic Study of CAE 2004, Volume 6, Issue 12, Pages 69-72

Abstract:

In this paper, the ventilation methods of kitchen in residence are classified into three kinds (&ldquoMechanical ventilation must be adopted in the kitchen in residence.In the aspects of building design, if inlets and outlets of the kitchen in residence were well arranged

Keywords： ventilation methods kitchen in residence CFD air distribution

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Residence time distribution and modeling of the liquid phase in an impinging stream reactor

Xingjun WANG, Xianhui HU, Lishun HU, Guangsuo YU, Fuchen WANG,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3, Pages 353-359 doi: 10.1007/s11705-009-0262-x

Abstract: Based on some experimental investigations of liquid phase residence time distribution (RTD) in an impinging

Keywords： RTD liquid dispersion reactor liquid independent

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Characteristics of carbonyls and volatile organic compounds (VOCs) in residences in Beijing, China

Hengyi DUAN,Xiaotu LIU,Meilin YAN,Yatao WU,Zhaorong LIU

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1, Pages 73-84 doi: 10.1007/s11783-014-0743-0

Abstract: Volatile organic compounds (VOCs) and carbonyl compounds were measured both indoors and outdoors in 50 residences of Beijing in heating (December, 2011) and non-heating seasons (April/May, 2012). SUMMA canisters for VOCs and diffusive samplers for carbonyl compounds were deployed for 24 h at each site, and 94 compounds were quantified. Formaldehyde, acetone and acetaldehyde were the most abundant carbonyl compounds both indoors and outdoors with indoor median concentrations being 32.1, 21.7 and 15.3 μg·m , respectively. Ethane (17.6 μg·m ), toluene (14.4 μg·m ), propane (11.2 μg·m ), ethene (8.40 μg·m ), n-butane (6.87 μg·m ), and benzene (5.95 μg·m ) showed the high median concentrations in indoor air. Dichloromethane, p-dichlorobenzene (p-DCB) and toluene exhibited extremely high levels in some residences, which were related with a number of indoor emission sources. Moreover, isoprene, p-dichlorobenzene and carbonyls showed median indoor/outdoor (I/O) ratios larger than 3, indicating their indoor sources were prevailing. Chlorinated compounds like CFCs were mainly from outdoor sources for their I/O ratios being less than 1. In addition, indoor concentrations between two sampling seasons varied with different compounds. Carbonyl compounds and some chlorinated compounds had higher concentrations in the non-heating season, while alkanes, alkenes, aromatic compounds showed an increase in the heating season. Indoor concentration of VOCs and carbonyls were influenced by locations, interior decorations and indoor activities, however the specific sources for indoor VOCs and carbonyls could not be easily identified. The findings obtained in this study would significantly enhance our understandings on the prevalent and abundant species of VOCs as well as their concentrations and sources in Beijing residences.

Keywords： indoor air Volatile organic compounds (VOCs) residence carbonyl compounds