Impact of multilayering on the filtration performance of clean air filter media

被引:9
作者
Tucny, Jean-Michel [1 ]
Vidal, David [2 ]
Drolet, Francois [3 ]
Bertrand, Francois [1 ]
机构
[1] URPEI, Chem Engn Dept, Polytech Montreal, POB 6079,Stn CV, Montreal, PQ H3C 3A7, Canada
[2] URPEI, Mech Engn Dept, Polytech Montreal, Montreal, PQ, Canada
[3] FPInnovations, Next Generat Proc, Pointe Claire, PQ, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
aerosol filtration; air filtration; fibrous media; lattice Boltzmann method; multilayering; SIZED AEROSOL-PARTICLES; CAPTURE EFFICIENCY; COLLECTION EFFICIENCY; FIBROUS MEDIA; PERMEABILITY; SIMULATION; REMOVAL;
D O I
10.1002/cjce.23815
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Fibrous filter media are commonly used to remove airborne particles that are harmful to human health and the environment. Although filter media are often multilayered for various reasons, no systematic study of the impact of multilayering on filter media performance has been reported. In this paper, direct numerical simulations with the lattice Boltzmann method are used in order to shed light on the impact of multilayering on the performance of clean bimodal fibrous filter media in a Stokes flow regime. Virtual model clean filter media with up to eight layers and various fibre formulations are compared in terms of permeability or pressure drop, capture efficiency, and quality factor. A careful analysis of the results revealed that multilayering had no statistically significant impact on the performance of the clean filter media. At best, the impact of multilayering was similar to that of the inherent variability of such random structures. Fibre formulation was found to be a more efficient way of improving the performance of the filter media. Placing interlayered air gaps between fibrous layers also slightly improved the quality factor by facilitating the flow at the interfaces of the fibrous layers. These findings will guide future studies on the performance of multilayered filters with more complex flow conditions, such as those encountered with inertial or nanofibre-made filter media and with the fouling of filter media.
引用
收藏
页码:2632 / 2647
页数:16
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