Development and Performance Evaluation of a Porous Tube Dilutor for Real-time Measurements of Fine Particles in High-humidity Environments

Woo, Chang Gyu; Hong, Ki-Jung; Kim, Hak-Joon; Han, Bangwoo; An, Jeongeun; Kang, Su Ji; Chun, Sung-Nam

doi:10.4209/aaqr.2018.08.0319

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Commercial diluters include rotating-disk (Zhang et al, 2014), porous tube (Woo et al, 2017), and ejector-type diluters (Wong et al, 2003). Most industrial combustion facilities use diluters that combine porous-tube and ejector technologies to measure the particle sizes from exhaust (Lipsky et al, 2002;Li et al, 2011;Saarnio et al, 2014); these technologies are also used to measure carbonyl components in gas (Reda et al, 2015a, b), diesel engine combustion particles (Lyyränen et al, 2004;Burtscher, 2005;Fujitani et al, 2008), and gases and particles from coal-fired power plant exhaust or ship diesel engines (Streibel et al, 2017).…”

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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