159 0

Development of a multi-slit virtual impactor as a high-volume bio-aerosol sampler

Title
Development of a multi-slit virtual impactor as a high-volume bio-aerosol sampler
Author
육세진
Keywords
Virtual impactor; Slit nozzle; Collection efficiency; Clean air; Wall loss
Issue Date
2020-11
Publisher
ELSEVIER
Citation
SEPARATION AND PURIFICATION TECHNOLOGY, v. 250, article no. 117275, page. 1-9
Abstract
Virtual impactors are capable of aspirating aerosols in the air, concentrating particles of a certain size, and discharging these particles through a minor flow. In general, commonly used virtual impactor has a cut-off size of 1 μm or more, a concentration ratio of 10–20 times, and an operating flowrate of 10 L/min; it is used to increase the detection probability of various aerosol measuring equipment. In this study, we developed a special-purpose virtual impactor aimed at the mass capturing of aerosols, including pathogens released by human respiration or coughing. For this purpose, we designed a virtual impactor exceeding the typical operating range, with a cut-off size of 0.3 μm and a concentration ratio of 13.3. Five multi-slit nozzles were adopted to indicate a cut diameter of 0.3 μm for a high aerosol flowrate of 170 L/min. Clean air was injected near the nozzle wall of the virtual impactor to minimize wall loss and further reduce the cut-off size. The performance of the designed virtual impactor was verified through numerical analyses and experimentation. As a result, aerosol aspirated at 170 L/min of flowrate was effectively concentrated in the minor flow with a cut-off size of 0.3 μm.
URI
https://www.sciencedirect.com/science/article/pii/S1383586620317494?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/172257
ISSN
1383-5866; 1873-3794
DOI
10.1016/j.seppur.2020.117275
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE