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RISS 인기검색어
- 검색키워드
- 저자 : Siri-achawawath Thanesvorn (검색결과 1 건)
- 무료
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Intra Panich,Wanusbodeepaisarn Paisarn,Siri-achawawath Thanesvorn 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.2
For this study, a unipolar corona-based ionizer was constructed and experimentally evaluated for charging effi ciencies and losses of ultrafi ne particles in the size range of 15–75 nm at diff erent corona voltage, ion trap voltage and particle fl ow rate. The corona voltage was applied to the ionizer between 2.0–3.0 kV. The discharge currents increased from 0.16 nA to 4.23 μA and the ion number concentration increased from 6.27 × 10 9 to 1.36 × 10 14 ions/m 3 . Increasing the corona voltage lead to a higher discharge current and ion number concentration in the ionizer. The best intrinsic charging effi ciency of the ionizer was about 92.15–99.33% for particle diameters ranging from 15 to 75 nm, and occurred at corona voltage, ion trap voltage and particle fl ow rate of about 3.0 kV, 100 V, 0.6 L/min, respectively. At a given corona voltage, the extrinsic charging effi ciency increased as the particle fl ow rate increased. The best extrinsic charging effi ciency ranged from 14.93 to 57.70% for particle diameters increasing from 15 to 75 nm, and occurred at corona voltage, ion trap voltage and particle fl ow rate of about 2.6 kV, 100 V, and 1.5 L/min, respectively. In the present ionizer, the highest electrostatic loss was observed for particles with a diameter of about 45 nm, and it was about 88.03% at a corona voltage of 3.0 kV and an ion trap voltage of 200 V. Finally, the highest diff usion loss of about 22.66% was seen to occur with singly charged particles with a diameter of 15 nm at the particle fl ow rate of about 0.6 L/min.
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