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Comparison of Geometrical Layouts for a Multi-Box Aerosol Model from a Single-Chamber Dispersion Study

1
The National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen, Denmark
2
Aerosol Physics, Laboratory of Physics, Faculty of Natural Sciences, Tampere University of Technology, Korkeakoulunkatu 10, FI-33720 Tampere, Finland
3
Institut National de Recherche et de Sécurité (INRS), Rue du Morvan CS 60027, 54519 Vandoeuvre CEDEX, France
4
Bundesanstalt für Arbeitsschutz und Arbeitsmedizin, Nöldnerstr. 40-42, 10317 Berlin, Germany
5
Centre for Occupational and Environmental Health, The University of Manchester, Oxford Rd., Manchester M13 9PL, UK
6
Institute of Occupational Medicine, Research Ave N, Currie EH14 4AP, UK
7
TNO, Lange Kleiweg 137, 2288 GJ Rijswijk, The Netherlands
8
Instituto Tecnológico del Embalaje Transporte y LOGÍSTICA, C/Albert Einstein, 1, 46980 Paterna, Spain
9
Department of Civil Engineering, Technical University of Denmark, Anker Engelunds Vej 1 Bygning 101A, 2800 Kongens Lyngby, Denmark
10
Force Technology, Park Allé 345, 2605 Brøndbyvester, Denmark
*
Author to whom correspondence should be addressed.
Environments 2018, 5(5), 52; https://doi.org/10.3390/environments5050052
Received: 19 February 2018 / Revised: 16 April 2018 / Accepted: 22 April 2018 / Published: 24 April 2018
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Abstract

Models are increasingly used to estimate and pre-emptively calculate the occupational exposure of airborne released particulate matter. Typical two-box models assume instant and fully mixed air volumes, which can potentially cause issues in cases with fast processes, slow air mixing, and/or large volumes. In this study, we present an aerosol dispersion model and validate it by comparing the modelled concentrations with concentrations measured during chamber experiments. We investigated whether a better estimation of concentrations was possible by using different geometrical layouts rather than a typical two-box layout. A one-box, two-box, and two three-box layouts were used. The one box model was found to underestimate the concentrations close to the source, while overestimating the concentrations in the far field. The two-box model layout performed well based on comparisons from the chamber study in systems with a steady source concentration for both slow and fast mixing. The three-box layout was found to better estimate the concentrations and the timing of the peaks for fluctuating concentrations than the one-box or two-box layouts under relatively slow mixing conditions. This finding suggests that industry-relevant scaled volumes should be tested in practice to gain more knowledge about when to use the two-box or the three-box layout schemes for multi-box models. View Full-Text
Keywords: aerosol modelling; dispersion factor; geometry; chamber study; multiple boxes; occupational exposure aerosol modelling; dispersion factor; geometry; chamber study; multiple boxes; occupational exposure
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Jensen, A.C.Ø.; Dal Maso, M.; Koivisto, A.J.; Belut, E.; Meyer-Plath, A.; Van Tongeren, M.; Sánchez Jiménez, A.; Tuinman, I.; Domat, M.; Toftum, J.; Koponen, I.K. Comparison of Geometrical Layouts for a Multi-Box Aerosol Model from a Single-Chamber Dispersion Study. Environments 2018, 5, 52.

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