Focusing particle concentrator with application to ultrafine particles
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United States of America Patent
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Jun 11, 2013
Grant Date -
Apr 28, 2011
app pub date -
Oct 22, 2010
filing date -
Oct 24, 2009
priority date (Note) -
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Abstract
Technology is presented for the high efficiency concentration of fine and ultrafine airborne particles into a small fraction of the sampled airflow by condensational enlargement, aerodynamic focusing and flow separation. A nozzle concentrator structure including an acceleration nozzle with a flow extraction structure may be coupled to a containment vessel. The containment vessel may include a water condensation growth tube to facilitate the concentration of ultrafine particles. The containment vessel may further include a separate carrier flow introduced at the center of the sampled flow, upstream of the acceleration nozzle of the nozzle concentrator to facilitate the separation of particle and vapor constituents.
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