AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Effect of Nanofibers on Collection Performance of Air Filters
HISASHI YUASA, Takashi Yoshitake, Takafumi Seto, Yoshio Otani, Kanazawa university
Abstract Number: 148 Working Group: Control Technology
Abstract Air filters composed of nanofibers are of great interest in the field of air filtration as a new medium to improve the filtration performance. The filtration theory predicts that nanofibers contribute to an increase in collection efficiency and a reduction in pressure drop, compared to the conventional micrometer sized fibers. However, the filtration efficiency of actual nanofibers filters is often lower than the predicted based on the single fiber filtration theory because uniform packing of nanofibers is quite difficult for the mass production. This study investigated the effects of nanofibers on filtration performance when they are laminated on or dispersed in micrometer sized filters. The test filters were prepared by a wet process with nanofiber and micrometer sized fiber. As a result, for the nanofiber laminated filters, the inhomogeneity factor of nanofiber layer ranged from 2 to 10 and the measured filtration efficiency was fairly in good agreement with the predicted accounting for the inhomogeneous packing of nanofiber layer, suggesting that the correction with inhomogeneous factor is valid for the nanofiber layered filters. The collection performance difference by lamination and dispersion of nanofibers on/in micrometer fiber filters is discussed according to the filtration theory.