Articles online

Dust Loading Performance of the PTFE HEPA Media and its Comparison with the Glass Fibre HEPA Media

Category: Control Techniques and Strategy

Article In Press
DOI: 10.4209/aaqr.2017.11.0481
PDF | RIS | BibTeX

Wanyi Zhang1,2, Shiming Deng2, Yongxiang Wang1, Zhongping Lin 1

  • 1 Institute of HVAC & Gas Engineering, School of Mechanical Engineering, Tongji University, Shanghai 200092, China
  • 2 Department of Building Service Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong


The surface filtration mode of PTFE HEPA media is studied.
k2 was defined to reflect the instantaneous growth rate of dynamic resistance.
Energy consumption evaluation for HEPA media by calculating average resistance.
Overall PTFE media are more energy efficient compared to glass fiber.


HEPA filter media have been used in many fields to maintain super clean air in an indoor environment. Due to their much lower initial resistance, PTFE HEPA media has increasingly attracted the interest of researchers. Solid KCl particles loading experiments were conducted to examine the dust loading performance of PTFE media and compare it with that of glass fiber media. The experimental results provided insights into the surface deposition mode of particles captured by PTFE media. A new resistance growth coefficient, k2, was defined to reflect both the instantaneous growth rate of the dynamic pressure drop and the dust loading stage of HEPA media. In addition, a method of evaluating the energy consumption of HEPA media was developed by calculating the average pressure drop during laboratory dust loading experiments. Based on the results, PTFE overall is more energy efficient than glass fiber except in circumstances of heavy loading or infrequent maintenance.


Surface filtration Resistance growth coefficient Average dynamic pressure drop

Related Article

Experimental Investigation of the Filtration Characteristics of Charged Porous Fibers

Chih-Te Wang, Tsung-Ming Tu, Jin-Yuan Syu, Chi-Ching Kuo, Pei-Chen Kuo, Yu-Rou Jhong, Wen-Yinn Lin
Volume: 18 | Issue: 6 | Pages: 1470-1482
DOI: 10.4209/aaqr.2017.12.0582

NO Adsorption and Oxidation on Mn Doped CeO2 (111) Surfaces: A DFT+U Study

Lu Liu, Chenghang Zheng, Junfeng Wang, Yongxin Zhang, Xiang Gao , Kefa Cen
Volume: 18 | Issue: 4 | Pages: 1080-1088
DOI: 10.4209/aaqr.2017.12.0597
PDF | Supplemental material

Magnetization of Metal Mesh for Fine Dust Capture

Sang In Choi, Jiaping Feng, Sang Bum Kim, Young Min Jo
Article In Press
DOI: 10.4209/aaqr.2017.11.0491