Figure of merit of composite filters with micrometer and nanometer fibers
Figure of merit of composite filters with micrometer and nanometer fibers
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DOI：
10.1080/02786820802249133
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发表时间：
2008-01-01
影响因子：
5.2
通讯作者：
Pui, David Y. H.
中科院分区：
文献类型：
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作者：
Wang, Jing;Kim, Seong Chan;Pui, David Y. H.
我们研究了由微米和纳米纤维组成的复合过滤器的过滤性能。使用品质因数（也称为品质因数）来评估滤波器的质量。我们使用压降和过滤效率的解析表达式来计算品质因数。研究了纳米和微米纤维的纤维直径、硬度和厚度以及面速度对品质因数的影响。然后使用传统过滤介质和纳米纤维复合过滤器获得的实验数据来验证计算结果。我们发现，对于大颗粒（大约 0.1 m 及以上），与传统过滤器相比，纳米纤维可以提高品质因数。较小的纤维尺寸、较大的坚固性和纳米纤维层的厚度导致在此尺寸范围内更好的过滤性能。对于小颗粒（大约低于 0.1 m），与传统过滤介质相比，纳米纤维不会提高品质因数。在此尺寸范围内，优选较大的纤维尺寸、较小的硬度和纳米纤维层的厚度。我们证明，我们使用分析表达式的程序是过滤介质设计的快速有效的工具。
We investigate the filtration performance of composite filters composed of micrometer and nanometer fibers. The filter quality is evaluated using the figure of merit, also known as the quality factor. We use analytical expressions for the pressure drop and filtration efficiency to compute the figure of merit. The effects on the figure of merit by fiber diameter, solidity, and thickness of nanometer and micrometer fibers and face velocity are investigated. Experimental data obtained using conventional filter media and nanofiber composite filters are then used to verify the calculated results. We find that for large particles (approximately 0.1 m and above), nanofibers can improve the figure of merit compared to conventional filters. Smaller fiber size, larger solidity, and thickness of the nanofiber layer lead to better filtration performance in this size range. For small particles (approximately below 0.1 m), nanofibers do not improve the figure of merit compared to conventional filter media. Larger fiber size, smaller solidity, and thickness of the nanofiber layer are preferred in this size range. We demonstrate that our procedure using analytical expression is a fast and effective tool for filter media design.