Designing Multi-Layer electret filters via numerical simulation

Gautam, S.; Kumar, A.; Tafreshi, H.V.; Pourdeyhimi, B.

doi:10.1016/j.ces.2023.119680

Cited by 2 publications

(1 citation statement)

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“…The relevant literature shows that, after a certain period of time [ 28 ], the surface charge of the electret material will decrease, and the electrostatic effect will weaken until mechanical filtration gradually replaces electrostatic filtration. Therefore, when the electret material has an electrostatic effect, its filtering effect is relatively good [ 29 ]. After the electrostatic effect disappears, the mechanism of action is the same as that of ordinary filter materials.…”

Section: Introductionmentioning

confidence: 99%

The Performance Testing and Analysis of Common New Filter Materials: A Case of Four Filter Materials

Sun,

Zhang,

Xue

et al. 2024

Materials

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The complex air environment makes it urgent to build good and safe indoor environments, and the study and application of new materials have become the focus of current research. In this study, we tested and analyzed the structural parameters and filtration performances of the four most commonly used new filter materials in the current market. The results showed that all four new filter materials showed a trend of first increasing and then decreasing their filtration efficiency with an increase in filtration velocity. The filtration efficiency of the materials was as follows: PTFE > glass fiber > nanomaterial > electret. The filtration efficiency of all materials reached its maximum when the filtration velocity was 0.2 m/s. The filtration efficiency of the PTFE for PM10, PM2.5, and PM1.0 was higher than that of the other three materials, with values of 0.87% to 24.93%, 1.21% to 18.69%, and 0.56% to 16.03%, respectively. PTFE was more effective in capturing particles smaller than 1.0 μm. Within the testing velocity range, the resistance of the filter materials was as follows: glass fiber > PTFE > electret > nanomaterial, and the resistance of the four materials showed a good fitting effect. It is also necessary to match the resistance with the filtration efficiency during use, as well as to study the effectiveness of filter materials in blocking microorganisms and absorbing toxic gases. Overall, PTFE showed the best comprehensive performance, as well as providing data support for the selection of related materials or the synthesis and research of filter materials in the future.

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Section: Introductionmentioning

confidence: 99%