Airborne nanoparticle sizing by aerodynamic particle focusing and corona charging

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dc.contributor.advisorTan, Z. Chao
dc.contributor.authorSaprykina, Alena
dc.date.accessioned2017-12-18T22:01:08Z
dc.date.available2017-12-18T22:01:08Z
dc.date.issued2009
dc.descriptionBibliography: p. 115-127en
dc.description.abstractOver the years, there have been increased indications that fine and ultrafine particles present in the air can cause significant health risks. A few instruments employing different techniques have been developed to measure real-time particle size distribution (PSD) in the air. Some of them can measure the PSD with high efficiency down to about 2.5 nm in diameter. However, existing techniques are quite expensive and sometimes require employment of an expendable and flammable fluid. In general, none of the conventional technologies allow combining high efficiency, easy access and low cost. Previous studies have shown that a new apparatus based on aerodynamic particle focusing and corona charging techniques produced good agreement in particle sizing and counting with the conventional one for particles larger than 60 nm. However, it was suggested that the corona charger generated particles less than 60 nm, and therefore could not be used directly in the range below 60 nm. In the present research the overall meterage system of the prototype was improved by determining the operational conditions which avoid particle generation. In addition, it was found that the corona charger section also filtered particles. Experimental investigation was introduced and an empirical correlation describing particle filtration rate was developed. Moreover, the theoretical part of the prototype operation was revised and corrected. It was found that the new apparatus could perform measurements without employing conventional techniques such as SMPS for its calibration. A comparison was made between the prototype and the SMPS using generated test particles in the size range below 300 nm (sodium chloride aerosol) to confirm accuracy of the developing apparatus' operation.
dc.format.extentxv, 127 leaves : ill. ; 30 cm.en
dc.identifier.citationSaprykina, A. (2009). Airborne nanoparticle sizing by aerodynamic particle focusing and corona charging (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/3174en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/3174
dc.identifier.urihttp://hdl.handle.net/1880/104175
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.titleAirborne nanoparticle sizing by aerodynamic particle focusing and corona charging
dc.typemaster thesis
thesis.degree.disciplineMechanical and Manufacturing Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 1894 520502064
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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