AAAR 37th Annual Conference October 14 - October 18, 2019 Oregon Convention Center Portland, Oregon, USA
Abstract View
Development of a Respirable Virtual-Cyclone Sampler
HONG-YANG CHEN, Chih-Wei Lin, Ting-Ju Chen, Sheng-Hsiu Huang, Yu-Mei Kuo, Chih-Chieh Chen, National Taiwan University
Abstract Number: 28 Working Group: Instrumentation and Methods
Abstract Health-based aerosol sampling should reflect how particles penetrate and deposit in the various regions of the human respiratory system. Therefore, size-selective sampling should be adopted when monitor aerosol concentration in the atmosphere. However, most samplers can only match the 50% cut point, but not the slope defined by the international community. Additionally, cyclone samplers were found to be affected by the aerosol deposition on the wall of the cyclone body, which leads to a significant decrease in aerosol penetration. A virtual cyclone was used to overcome the loading effect, but still had the disadvantage of showing high aerosol penetration on the large particle size. In this work, the configurations of the virtual cyclones were further studied to eliminate the tailing phenomenon of the separation efficiency curve. The new virtual cyclones successfully demonstrate accurate and constant measurement of the atmospheric dust component, and thus the extent of health hazards.