Filtration properties of nanofiber/microfiber mixed filter and prediction of its performance

Hyun Jin Choi, Mikio Kumita*, Sho Hayashi, Hisashi Yuasa, Mie Kamiyama, Takafumi Seto, Chuen-Tinn Tsai, Yoshio Otani

*Corresponding author for this work

研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)

摘要

There is an increasing demand of air filters with a high collection performance, i.e., high collection efficiency and low pressure drop, for the application to indoor air cleaning. Air filters consisting of nanofibers have attracted great interests since they may have a low pressure drop because of slip flow effect and high collection efficiency due to interception. Although various nanofiber filters are available on the market, their collection performance is not as high as expected by the conventional filtration theory because non-uniform packing of fibers plays a significant role. In the present work, the collection performance of nanofiber (780 nm) and microfiber (11.2 µm) mixed filters with various mixing fractions was studied in order to maximize the quality factor of filter, qF, as a function of mixing fraction of nanofibers. The collection performance of mixed fiber filters was predicted by using theoretical equations reported by Bao et al. (1998) for bimodal distribution of fibers. As a result, it was found that the mixed fiber filters had a uniform fiber packing compared to laminated filters and that the collection efficiency was well predicted by introducing the inhomogeneity factor calculated for the filter consisting of two distinct fiber sizes. Furthermore, we found that the mixed fiber filter with the nanofiber mixing fraction of 5% in mass had the highest quality factor.

原文English
頁(從 - 到)1052-1062
頁數11
期刊Aerosol and Air Quality Research
17
發行號4
DOIs
出版狀態Published - 1 四月 2017

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