Influence of sheath air humidity on measurement of particle size distribution by scanning mobility particle sizer

Mariam,; Joshi, Manish; Khandare, Pallavi; Koli, Amruta; Khan, Arshad; Sapra, B.K.

doi:10.1016/j.jaerosci.2017.05.005

Cited by 6 publications

(1 citation statement)

References 29 publications

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“…The current method used to measure PM 10 and PM 2.5 concentrations in stacks is based on a gravimetric approach that requires several days to obtain sufficient mass concentration data. Optical particle counters (OPCs) (Chien et al, 2016), Scanning Mobility Particle Sizers (SMPSs; Mariam et al, 2017), and Aerodynamic Particle Sizers (APSs) are real-time particle measuring instruments. However, because most industrial combustion facility stacks are characterized by high temperatures and particle concentrations, the use of diluters is essential to reduce the temperature (0-40°C) and particle concentrations to a measurable range.…”

Section: Introductionmentioning

confidence: 99%

Dilution Ratio and Particle Loss Performance of a Newly Developed Ejector Porous Tube Diluter Compared to a Commercial Diluter

Shin

Seo

Hong

et al. 2020

Aerosol Air Qual. Res.

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In this study, a new ejector-porous tube diluter was developed to accurately in situ measure particulate matter at the source, e.g., emissions at coal-fired power plants, and its dilution ratio and particle loss were compared to those of a commercial model. Whereas commercial models supply air to the porous tube diluter (PRD) using a high-pressure compressor, our device replaces the latter with a ring blower, thereby decreasing the power consumption for the same airflow rate. As a demonstration, particle size volume distributions of fly ash at a coal-fired power plant stack were determined for different dilution ratios. PRD flow rates of 10 and 20 L min -1 for the commercial diluter produced ~2-µm particle volume concentrations of 382 and 572 µm 3 cm -3 , respectively, from an initial (undiluted) volume concentration of 756 µm 3 cm -3 . However, PRD flow rates of 10 and 30 L min -1 for the developed device produced ~2-µm particle volume concentrations of 506 and 500 µm 3 cm -3 , respectively, from an initial volume concentration of 532 µm 3 cm -3 . These particle loss rates were confirmed through field testing.

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Section: Introductionmentioning

confidence: 99%