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dc.contributor.authorChien, Chih-Liangen_US
dc.contributor.authorTien, Chi-Yuen_US
dc.contributor.authorLiu, Chun-Nanen_US
dc.contributor.authorYe, Huajunen_US
dc.contributor.authorHuang, Weien_US
dc.contributor.authorTsai, Chuen-Jinnen_US
dc.date.accessioned2016-03-28T00:04:14Z-
dc.date.available2016-03-28T00:04:14Z-
dc.date.issued2015-01-01en_US
dc.identifier.issn0278-6826en_US
dc.identifier.urihttp://dx.doi.org/10.1080/02786826.2015.1089976en_US
dc.identifier.urihttp://hdl.handle.net/11536/129438-
dc.description.abstractThe NCTU micro-orifice cascade impactor (NMCI) was redesigned and tested to enable the measurement and adjustment of the jet-to-plate distance (S) of the impactors by using a micrometer. Each stage of the NMCI contains an impaction plate and a nozzle plate which are separated. The bottom casing for impaction plate assembly and the nozzle plate holder of each stage are separated. Calibration results show that the cutoff aerodynamic diameter (d(pa50)) of the three lower stages (d(pa50) = 180, 100, and 56 nm) are close to the nominal values given in Marple et al. (1991). In addition, the S/W (W: nozzle diameter) effects on the d(pa50) for the three lower stages were investigated and an empirical equation was developed to facilitate the prediction of d(pa50) when the nozzle diameters may change slightly from one batch to another. The relationship between the nozzle diameter and pressure drop of the micro-orifice impactors at the fixed operational flow rate of 30 L/min was also established so that the nozzle diameters can be predicted from the pressure drop measurement. An empirical equation was proposed to express the correlation between the dimensionless cutoff size and the S/W ratio when considering isentropic flow to facilitate the design of microorifice impactors for S/W > 4. It is expected that the present NMCI could improve the accuracy of size classification of submicron particles below 180 nm, especially for nanoparticles.en_US
dc.language.isoen_USen_US
dc.titleDesign and Testing of the NCTU Micro-Orifice Cascade Impactor (NMCI) for the Measurement of Nanoparticle Size Distributionsen_US
dc.typeArticleen_US
dc.identifier.doi10.1080/02786826.2015.1089976en_US
dc.identifier.journalAEROSOL SCIENCE AND TECHNOLOGYen_US
dc.citation.volume49en_US
dc.citation.issue10en_US
dc.citation.spage1009en_US
dc.citation.epage1018en_US
dc.contributor.department環境工程研究所zh_TW
dc.contributor.departmentInstitute of Environmental Engineeringen_US
dc.identifier.wosnumberWOS:000366400100012en_US
dc.citation.woscount0en_US
Appears in Collections:Articles