Dilution Ratio and Particle Loss Performance of a Newly Developed Ejector Porous Tube Diluter Compared to a Commercial Diluter
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...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer
2020-07-01
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| Series: | Aerosol and Air Quality Research |
| Subjects: | |
| Online Access: | https://doi.org/10.4209/aaqr.2020.03.0117 |
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| Summary: | 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. |
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| ISSN: | 1680-8584 2071-1409 |