Indoor Aerosol Particle Deposition in an Empty Office

Smolik, J.; Lazaridis, Mihalis; Moravec, P.; Schwarz, Jaroslav; Zaripov, S. K.; Ždı́mal, Vladimı́r

doi:10.1007/s11270-005-7146-6

Cited by 35 publications

(18 citation statements)

References 30 publications

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“…The range of the overall variation of the indoor BC concentrations mainly depends upon the transport from outdoors through the ventilation process and ranges between 0.027 and 0.072 μg min −1 , while the deposition contributes very little to the variation of the indoor concentrations (within the range 0.004 to 0.029 μg min −1 ). This is in agreement with the findings that are reported by Smolik et al (2005) that the deposition rate of particles in the accumulation mode is almost negligible compared to the values of the air exchange rate. The greater source and sink terms due to transport are observed in RF3 during the warm period apparently due to the high outdoor concentrations (Fig.…”

Section: Quantitative Assessment Of Each Mechanism's Contribution To supporting

confidence: 93%

“…In certain cases, it is assumed that the main processes influencing the change rate of the indoor concentrations are the outdoor pollution, the transport between the indoor and outdoor environments and the deposition on indoor surfaces (Smolik et al 2005;He et al 2005). The pollutant's transport between indoor and outdoor environment is mainly governed by: (a) the ventilation rate, which is measured by the air changes per hour (h −1 ) representing the tightness of the building shell, cracks, etc.…”

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confidence: 99%

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A Comparative Study of the Main Mechanisms Controlling Indoor Air Pollution in Residential Flats

Halios

Helmis

Eleftheriadis

et al. 2009

Water Air Soil Pollut

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The relative contribution of the main mechanisms that control indoor air quality in residential flats was examined. Indoor and outdoor concentration measurements of different type pollutants (black carbon, SO 2 , O 3 , NO, NO 2 ,) were monitored in three naturally ventilated residential flats in Athens, Greece. At each apartment, experiments were conducted during the cold as well as during the warm period of the year. The controlling parameters of transport and deposition mechanisms were calculated from the experimental data. Deposition rates of the same pollutant differ according to the site (different construction characteristics) and to the measuring period for the same site (variations in relative humidity and differences in furnishing). Differences in the black carbon deposition rates were attributed to different black carbon size distributions. The highest deposition rates were observed for O 3 in the residential flats with the older construction and the highest humidity levels. The calculated parameters as well as the measured outdoor concentrations were used as input data of a one-compartment indoor air quality model, and the indoor concentrations, the production, and loss rates of the different pollutants were calculated. The model calculated concentrations are in good agreement with the measured values. Model simulations revealed that the mechanism that mainly affected the change rate of indoor black carbon concentrations was the transport from the outdoor environment, while the removal due to deposition was insignificant. During model simulations, it was also established that that the change rate of SO 2 concentrations was governed by the interaction between the transport and the deposition mechanisms while NO X concentrations were mainly controlled through photochemical reactions and the transport from outdoors.

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Section: Quantitative Assessment Of Each Mechanism's Contribution To supporting

confidence: 93%

mentioning

confidence: 99%

A Comparative Study of the Main Mechanisms Controlling Indoor Air Pollution in Residential Flats

Halios

Helmis

Eleftheriadis

et al. 2009

Water Air Soil Pollut

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“…The relationship of indoor and outdoor particulate matter was examined in several environments [27][28][29][30][31][32] and the reported results strongly associated the indoor PM concentration with the outdoor one. In respect to particle dynamics and using mass balance models, the authors managed to determine deposition indoors and penetration from outdoors, although the variability of the results indicated the strong dependence on assumptions, different methodologies and building characteristics [33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Modeling of the aerosol infiltration characteristics in a cultural heritage building: The Baroque Library Hall in Prague

Chatoutsidou

Mašková

Ondráčková

et al. 2015

Building and Environment

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Please cite this article as: Chatoutsidou SE, Mašková L, Ondráčková L, Ondráček J, Lazaridis M, Smolík J, Modeling of the aerosol infiltration characteristics in a cultural heritage building: The Baroque Library Hall in Prague, Building and Environment (2015), doi: 10.1016/j.buildenv.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A dynamic mass balance model was introduced taking account particle penetration from outdoors and indoor losses (deposition, ventilation). The model was used to determine deposition rate k and penetration efficiency P in 13 discrete size intervals. Model performance was evaluated using the coefficient of determination (R 2 ) by selecting different pairs of k and P. No unique solution found, thus, averaged values of k and P from the best correlated pairs were used to estimate infiltration factor. Good agreement between infiltration factor and I/O ratio confirmed that modeled k and P were well-estimated. The deposition rate was found to depend strongly on particle size with higher rates for ultrafine and coarse particles. Penetration efficiency, on the other hand, was not clearly related with particle size. The infiltration factor varied substantially with particle size with less effective removal for accumulation fraction (0.1-0.7 µm). Higher infiltration factor for ultrafine particles, compared to coarse particles, indicates that enrichment of the library at this size is caused by penetration from outdoors. On the other hand, human presence during visiting hours found to contribute significantly to coarse particles by increasing the indoor number concentration by a factor of 3, 3.2 and 2 during spring, summer and winter respectively.

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“…There are several studies that tried to determine P and k separately by increasing the indoor PM concentrations significantly. This was achieved either by opening of windows and doors and measurement of subsequent decay of particles indoors after windows and doors were closed (Vette et al, 2001;Chao et al, 2003;Smolík et al, 2005) or by resuspension activities indoors followed again by period of particle decay (Thatcher and Layton, 1995;Thatcher et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Contribution of Visitors to the Indoor PM in the National Library in Prague, Czech Republic

Mašková

Smolik

Trávníčková

et al. 2016

Aerosol Air Qual. Res.

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Temporal and spatial variation of size resolved particulate matter (PM) was measured in the Baroque Library Hall of the National Library in Prague during four intensive campaigns by an Aerodynamic Particle Sizer and three DustTrak instruments. The analysis showed, the indoor air can be considered as well mixed and therefore the simple mass balance model was used to estimate basic parameters (ventilation rate, deposition rates and penetration factors). The results revealed that the movement of visitors during visiting hours is the main source of indoor coarse PM. Mass emission rates, estimated from the comparison of measured and modelled data indicates the visitors should contribute about 50 g of coarse particles yearly, which is about 35% of the total load of indoor PM.

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Indoor Aerosol Particle Deposition in an Empty Office

Cited by 35 publications

References 30 publications

A Comparative Study of the Main Mechanisms Controlling Indoor Air Pollution in Residential Flats

A Comparative Study of the Main Mechanisms Controlling Indoor Air Pollution in Residential Flats

Modeling of the aerosol infiltration characteristics in a cultural heritage building: The Baroque Library Hall in Prague

Contribution of Visitors to the Indoor PM in the National Library in Prague, Czech Republic

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