Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/94375
Title: | A novel U-shaped acoustic-manipulated design to enhance the performance of low-efficiency filters for sub-micron particles | Authors: | Zhang, YT Lai, SK Yu, JCW Guo, H Lim, CW |
Issue Date: | Nov-2021 | Source: | Powder technology, Nov. 2021, v. 392, p. 412-423 | Abstract: | Acoustic manipulation is a non-contact process that applies acoustic waves to immobilize particles into a specific region for a variety of potential applications. This provides an alternative way to address air ventilation requirements where building systems are becoming smarter and more efficient. Development of such a process within confined spaces can incorporate microscopic interactions to filter aerosol-based particulate matter (PM). In real-engineering conditions, it is hard to filter sub-micron particles (0.25–1.0 μm) than super-micron particles (> 2.5 μm) by using low-grade filters. The objectives of this work are twofold. First, we propose a new acoustic-driven pre-filtering device (i.e., a U-shaped resonant acoustic chamber) that can improve the working efficiency of low-grade filters for capturing such particles. Second, the device can optimize spatial homogeneity to enhance the removal efficiency of airborne particles under lower sound intensity requirements. The U-shaped acoustic-driven device in the form of a resonant chamber allows PM to reside at the pressure node of a standing wave. Experimental studies are conducted to verify the present design. The results show that an overall filtration efficiency of up to 89% for 1.0-μm airborne particles can be achieved when the acoustic-driven device is coupled together with a low-grade MERV-6 coarse filter. As a standalone device, the acoustic effect works well for the submicron particles with a filtration efficiency of up to 61% under a lower sound pressure level (116 dB) than as previously reported in the literature. In the analysis, we also discuss the performance dependence on frequency, sound pressure level and flow rate in terms of particle size distribution. The relevance of this research is a major step towards engineering an acoustic-based pre-filtering technique for developing future innovative ventilation solutions. | Keywords: | Filtration efficiency Mechanical ventilation Particle trapping U-shaped design |
Publisher: | Elsevier | Journal: | Powder technology | ISSN: | 0032-5910 | EISSN: | 1873-328X | DOI: | 10.1016/j.powtec.2021.07.013 | Rights: | © 2021 Elsevier B.V. All rights reserved. The following publication Zhang, Y. T., Lai, S. K., Yu, J. C. W., Guo, H., & Lim, C. W. (2021). A novel U-shaped acoustic-manipulated design to enhance the performance of low-efficiency filters for sub-micron particles. Powder Technology, 392, 412-423 is available at https://dx.doi.org/10.1016/j.powtec.2021.07.013. © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Zhang_Novel_U-Shaped_Acoustic-Manipulate.pdf | Pre-Published version | 2.96 MB | Adobe PDF | View/Open |
Page views
67
Last Week
1
1
Last month
Citations as of Sep 22, 2024
Downloads
14
Citations as of Sep 22, 2024
SCOPUSTM
Citations
5
Citations as of Sep 26, 2024
WEB OF SCIENCETM
Citations
4
Citations as of Sep 26, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.