Dongho Shin1,3, Hyunsoo Seo1, Kee-Jung Hong1, Hak-Joon Kim1, Yong-Jin Kim1, Bangwoo Han This email address is being protected from spambots. You need JavaScript enabled to view it.1, Ga-Young Lee2, Sung-Nam Chun2, Jungho Hwang This email address is being protected from spambots. You need JavaScript enabled to view it.3

1 Department of environment Machinery, Korea Institute of Machinery & Materials, Daejeon 34103, Korea
2 Korea Electric Power Research Institute, Daejeon 305-380, Korea
3 Mechanical Engineering, Yonsei University, Seoul 038722, Korea


Received: March 25, 2020
Revised: June 30, 2020
Accepted: July 19, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.2020.03.0117  

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Cite this article:

Shin, D., Seo, H., Hong, K.J., Kim, H.J., Kim, Y.J., Han, B.H., Lee, G.Y., Chun, S.N. and Hwang, J. (2020). Dilution Ratio and Particle Loss Performance of a Newly Developed Ejector Porous Tube Diluter Compared to a Commercial Diluter. Aerosol Air Qual. Res. 20: 2396–2403. https://doi.org/10.4209/aaqr.2020.03.0117


HIGHLIGHTS

  • A new diluter was developed for accurate particle concentration measurements.
  • The diluter could be operated by relatively low air pressures and low air flowrates.
  • The diluter had less particle losses for particles of > 1 µm than a commercial dilutor.
 

ABSTRACT


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 µm3 cm–3, respectively, from an initial (undiluted) volume concentration of 756 µm3 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 µm3 cm–3, respectively, from an initial volume concentration of 532 µm3 cm–3. These particle loss rates were confirmed through field testing.


Keywords: Diluter; Ejector; Porous tube; Particle loss; Turbulence.



Aerosol Air Qual. Res. 20 :2396 -2403 . https://doi.org/10.4209/aaqr.2020.03.0117  


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