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Measurement of ultrafine aerosol size distributions by a combination of diffusion screen separators and condensation particle counters

Feldpausch, Philipp and Fiebig, Markus and Fritzsche, Lutz and Petzold, Andreas (2006) Measurement of ultrafine aerosol size distributions by a combination of diffusion screen separators and condensation particle counters. Journal of Aerosol Science, 37 (5), pp. 577-597. DOI: 10.1016/j.jaerosci.2005.04.009.

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Official URL: http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235810%232006%23999629994%23622069%23FLA%23&_cdi=5810&_pubType=J&view=c&_auth=y&_acct=C000007338&_version=1&_urlVersion=0&_userid=100058&md5=88ce0fb5ba5b523a04f76b4fccc6fb1f

Abstract

The quasi-real-time measurement of ultrafine aerosol size distributions by a combination of a diffusion screen separator (DS), which is similar to a single stage of a screen-type diffusion battery, and a condensation particle counter (CPC) was developed, characterised, and evaluated. The instrument reports information on the particle size distribution for particle diameters between approximately 20 and 100 nm. The instrument system was characterised for various operation conditions in order to provide reliable instrument transfer functions for data inversion purposes. The penetration behaviour of specified diffusion screens was examined for the expected range of operation pressure conditions (200 hPa ≤ p ≤ 955 hPa), number of diffusion screens (3 ≤ nS ≤ 17), and volumetric flow rates (0.99 ≤ q ≤ 1.89 Lpm). The comparison of results between the calibration experiments and the "classical" filtration theory of particle deposition on fibres or wires shows excellent agreement for the entire range of investigated operation conditions. The calibration results were evaluated in a validation experiment using monodisperse test aerosol particles. In a final study, the entire measurement system consisting of three parallel-operated CPC–DS combinations was successfully applied to polydisperse laboratory-generated test aerosols. A comparison of size distributions obtained from a differential mobility analyser (DMA) and the presented instrument shows very close agreement for cases with the modal diameter of the investigated aerosol size distribution being in the sub-100 nm range.

Document Type:Article
Title:Measurement of ultrafine aerosol size distributions by a combination of diffusion screen separators and condensation particle counters
Authors:
AuthorsInstitution or Email of Authors
Feldpausch, PhilippLMU München, München
Fiebig, MarkusUNSPECIFIED
Fritzsche, LutzBundesanstalt für Materialforschung und- prüfun, Berlin
Petzold, AndreasUNSPECIFIED
Date:May 2006
Journal or Publication Title:Journal of Aerosol Science
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:37
DOI:10.1016/j.jaerosci.2005.04.009
Page Range:pp. 577-597
Status:Published
Keywords:Nanoparticles, Size distribution measurement, Diffusion battery, Diffusion screen, Real-time particle measurement
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Low-Emission Air Traffic (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Dr.rer.nat. Markus Fiebig
Deposited On:11 Dec 2006
Last Modified:11 Nov 2014 21:56

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