Open AccessLong-term performance of fibrous ventilation/air cleaner filter for particle removal
Author(s) -
Lili Ji,
Jingjing Pei,
Wenlong Liu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/609/3/032066
Subject(s) - pressure drop , ventilation (architecture) , air change , particle (ecology) , environmental science , term (time) , air filter , filter (signal processing) , particle filter , materials science , drop (telecommunication) , environmental engineering , mechanics , process engineering , engineering , mechanical engineering , physics , electrical engineering , oceanography , quantum mechanics , geology , inlet
The performance of building ventilation systems and/or portable indoor air cleaners is greatly affected by the performance of the fibrous filters installed in them. The initial particle efficiency is generally used as a measure to evaluate the performance of the fibrous filters. However, with dust loading, the long-term performance of the filters might change, and the filters may become particle sources themselves and affect the performance of other systems. Previous studies on long-term performance were mainly based on theoretical analyses or laboratory experimental tests. This study investigates the long-term efficiency and pressure-drop change of various ventilation filters during real operation. No obvious efficiency decrease is observed, and it is inferred that the effect of dust loading on efficiency can be ignored. Secondary particle detachment is found to be possible in real applications, but its effect on the downstream concentration and indoor air can be made negligible with the use of an H-level filter. The pressure drop of the ventilation filter is also found to increase significantly.