Collection Performance of Electret Filter for Smoke Particles
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概要
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Collection performance of an electret filter, which carries permanent electric charges on its fibers, was studied experimentally. The filter, made of polypropylene, is 4 mm in thickness. Fibers are cylindrical of 33 μm in diameter. <BR> Experiments were carried out at the filtration velocity of 28 and 40 cm/s. <BR> Collection efficiency of the electret filter is high when it is clean but decreases as smoke particles are loaded. The collection efficiency of a single electret fiber is ten times greater than that of a conventional filter. <BR> The charge density of the fiber, and the relationship between collection efficiency and pressure drop in the filter are also discussed.
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