Evaluation of characterization and filtration performance of air cleaner materials
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ORIGINAL PAPER
Evaluation of characterization and filtration performance of air cleaner materials Z.‑J. Zhou1 · B. Zhou2 · C.‑H. Tseng1 · S.‑C. Hu3 · A. Shiue3 · G. Leggett4 Received: 12 June 2020 / Revised: 30 August 2020 / Accepted: 30 September 2020 © Islamic Azad University (IAU) 2020
Abstract The following common filter materials were characterized and evaluated for filtration performance: glass fiber (GF), polytetrafluoroethylene (PTFE), and polypropylene (PP). The pressure drop of GF and PFFE was found to be approximately 500– 600 Pa at 0.10 m/s face velocity, and the pressure drop for the PP is lower at only 30–80 Pa. The filtration efficiency of PTFE and GF was determined as 99.067% and 98.234%. Results show the filtration efficiency of PP is between 95.836–98.732%, but the filtration efficiency of PP filter materials will decrease 20–60% after electrostatic removal. The contribution of various particle collection mechanisms to the overall efficiency of the filter was calculated using the single-fiber filtration efficiency model. The diffusion of the aerosol particles at submicron size was the main collection mechanism, and the contribution of the gravity sedimentation mechanism to the measured particle size range was very low or even negligible. Keywords Particulate matter · Air filter · Glass fiber · Polytetrafluoroethylene · Polypropylene
Introduction Currently in the developed world, on average, people spend 80–90% of their daily lives in an indoor environment. A USA Environmental Protection Agency (EPA) study found that the concentrations of indoor air pollutants in commercial buildings and public places are often several times, or even up to one hundred times more than that of outdoor air (Yousef et al. 2016). This is in contrast with the public Editorial responsibility: Samareh Mirkia. Z.-J. Zhou, B. Zhou, C.-H. Tseng and S.-C. Hu are equally contributed to this work. * A. Shiue [email protected] 1
Institute of Environment Engineering and Management, National Taipei University of Technology, Taipei, Taiwan, ROC
2
Department of HVAC, College of Urban Construction, Nanjing Tech University, No. 200 North Zhongshan Rd., P.O. Box 76, Nanjing 210009, China
3
Department of Energy and Refrigerating Air‑Conditioning Engineering, National Taipei University of Technology, 1, Sec. 3, Chung Hsiao E Road, Taipei 10608, Taiwan, ROC
4
LI-COR Biosciences, Cambridge, England, UK
conception that indoor air quality should be better than outdoor air quality. Because the indoor space is mostly confined or semi-confined, there are many problems associated with lack of sunlight, poor ventilation, high temperature, and humidity. If the indoor ventilation rate is insufficient, the concentration of indoor particulate matter will accumulate. According to epidemiological studies of air pollution in the past, there is a statistically significant correlation between the increase in particulate size, rates of heart disease, and mortality. To reduce the threat to human health caused by indoor particulate
