Water-based condensation particle counters comparison near a major freeway with significant heavy-duty diesel traffic

Lee, Eon S.; Polidori, Andrea; Koch, Michael; Fine, Philip M.; Mehadi, Ahmed; Hammond, Donald; Wright, Jeffery N.; Miguel, Antonio H.; Ayala, Alberto; Zhu, Yifang

doi:10.1016/j.atmosenv.2012.12.001

Cited by 8 publications

(7 citation statements)

References 14 publications

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“…This was also pointed out by the work of Bau et al (2019) which highlighted that the accuracy of w-CPC is dependent on their technical design. To minimize instrumental or model differences, post-data correction equations were proposed by Lee et al (2013) to adjust the data from TSI water-based CPC using exponential models. Bau et al (2017Bau et al ( , 2019 show that w&b-CPC studied were found to be within ± 25 % of the reference, except for a w-CPC (TSI model 3787) known to be highly sensitive to particle hydrophobicity.…”

Section: Experimental Setup and Smps Typesmentioning

confidence: 99%

An intercomparison exercise of good laboratory practices for nano-aerosol size measurements by mobility spectrometers

et al. 2020

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An intercomparison exercise of good laboratory practices for nanoaerosols size measurements by mobility spectrometersAn intercomparison campaign on nanoparticle size measurement was organized in the frame of the French nanoMetrology club. The aim of this study is to make an inventory of the metrological capabilities of all measurement techniques in France involved in the "nano" size range, including the SMPS (Scanning Mobility Particle Sizer) concerning aerosol metrology. For this study, four samples have been proposed, namely (1) -a SiO 2 colloidal suspension (FD304) consisting of a monomodal population, (2)two samples consisting of two nanoparticle populations of SiO 2 having proportions to be determined and(3) -a TiO 2 colloidal suspension. Ten SMPS associated to five participants around a common experimental setup were performed in link with a control SMPS to have simultaneous measurement s with a same instrument in each laboratory in parallel with the SMPS used by each partner. This article presents SMPS results of this study associated with the description of the experimental set -up and the sample preparation protocol with an identified schedule and comparison with SEM measurements. The present paper does not focus on the actual capability of the tested mobility spectrometers, but aims to highlight s the good laboratory practices using their own but common resources in terms of aerosol generation and measurement set-ups.

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Section: Experimental Setup and Smps Typesmentioning

confidence: 99%

An intercomparison exercise of good laboratory practices for nano-aerosol size measurements by mobility spectrometers

et al. 2020

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“…The numeric modeling approach used here has been documented in previous publications (Hering et al, 2014;Lewis and Hering, 2013). First, the temperature and humidity profiles were computed using the finite element modeling software -COMSOL Multiphysics®.…”

Section: Numerical Simulation 135mentioning

confidence: 99%

“…tube extending through a 154 mm conditioner, a 76 mm initiator, and a 100 mm moderator, with a design flow rate of 1.5 L/min. Next, the particle growth, temperature and humidity profiles were calculated using a numerical model developed by Lewis and Hering (Lewis and Hering, 2013), written in Igor Pro 140 (Wavementrics, Beaverton, OR). Their simulation results suggest that the three-stage configuration is superior in decreasing the amount of water vapor and lowering the particle loss and variation in detection and collection, avoiding the side-effect of heating the flow.…”

Section: Numerical Simulation 135mentioning

confidence: 99%

“…This behavior is consistent with Bian's result, which shows that the flow rate varied by a factor of 2.5, the final size decreased by 43%. 150 Numerical simulations of the temperature and humidity profiles and the particle growth were calculated for the geometry of the vWCPC 3789 described above, using the methods published by Hering's group (Hering et al, 2014;Lewis and Hering, 2013). The assumption and equations used for the simulation are included in the supplemental document.…”

Section: Numerical Simulation 135mentioning

confidence: 99%

“…Many field deployments confirm that the water-based CPC has comparable performance to a butanol-based CPC when examining urban pollution and diesel combustion aerosol (Franklin et al, 2010;Jeong and Evans, 2009;Kaminsky et al, 2009;Keller et al, 2013;Lee et al, 2013;Sharma et al, 2011;Tsang et al, 2008). Based on these promising research results, it is desirable to explore the advanced water-based CPC for airborne measurements.…”

Section: Introductionmentioning

confidence: 96%

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Simulation-aided characterization of a versatile water condensation particle counter for atmospheric airborne research

Mei

Spielman

Hering

et al. 2021

Preprint

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Abstract. Capturing the vertical profiles and horizontal variations of atmospheric aerosols often requires accurate airborne measurements. With the advantage of avoiding health and safety concerns related to the use of butanol or other chemicals, a water-based condensation particle counter (wCPC) has emerged to provide measurements under various environments. However, the airborne deployment of wCPC is relatively rare due to the lack of characterization of wCPC performance. This study investigates the performance of a commercial "versatile" water CPC (vWCPC Model 3789, TSI) under low-pressure conditions. The effect of conditioner temperature on wCPC performance at low pressure is examined through numerical simulation and laboratory experiments. We show that the default instrument temperature setting of 30 °C for the conditioner is not suitable for airborne measurement and that the optimal conditioner temperature for low-pressure operation is 27 °C. Additionally, we show that insufficient droplet growth becomes more significant under the low-pressure operation. The variation in the chemical composition can contribute up to 20 % uncertainty in the counting efficiency of the wCPC, but this variation is independent of pressure.

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Numerical simulation on the effects of flow parameters on the detection performance of a self-developed condensation particle counter

Guo,

Liu,

Han

et al. 2023

J Nanopart Res

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Water-based condensation particle counters comparison near a major freeway with significant heavy-duty diesel traffic

Cited by 8 publications

References 14 publications

An intercomparison exercise of good laboratory practices for nano-aerosol size measurements by mobility spectrometers

An intercomparison exercise of good laboratory practices for nano-aerosol size measurements by mobility spectrometers

Simulation-aided characterization of a versatile water condensation particle counter for atmospheric airborne research

Numerical simulation on the effects of flow parameters on the detection performance of a self-developed condensation particle counter

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