Comparisons of the Different Discharge Performances and the Effect of Long-Term Loading with the Liquid Aerosol on Electret Media

  • Yongxiang Wang
  • Zhongping LinEmail author
  • Wanyi Zhang
Conference paper
Part of the Environmental Science and Engineering book series (ESE)


To determine the classification of electret filters, EN 779 and ISO 16890 have taken the IPA immersion and fumigation as the discharging method, respectively. This study compared the efficiency of electret filtration media discharged by the method of EN 779 and ISO 16890, respectively. It was found that the discharged efficiency of electret media using the method specified in ISO 16890 was lower than those discharged by the discharging method of EN 779. By comparing the discharged efficiency of electret media with the efficiency of uncharged samples, results showed that the discharged efficiency of electret media treated by IPA fumigation was close to the uncharged efficiency. Moreover, the loading experiment that the electret medium was challenged by the liquid DEHS aerosol was conducted to evaluate the long-term loading performance of electret media. It was found that the efficiency of electret sample gradually declined from 92 to 30%.


Electret media Discharging Long-term loading Efficiency Isopropanol 



The project has been supported by the China National Key R&D Program ‘Energy-saving design and key technical equipment development for clean air-conditioning plants’ (Grant No. 2018YFC0705202).


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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.School of Mechanical EngineeringTongji UniversityShanghaiChina

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