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Influence of Electrostatic Discharge Circuit Parameters on the Minimum Ignition Energy of Suspended Dust Clouds  

Moon, Kyoon-Tae (The Graduate School of Energy and Environment, Seoul National University Science and Technology)
Chung, Jae-Hee (The Graduate School of Energy and Environment, Seoul National University Science and Technology)
Yamaguma, Mizuki (Japan National Institute of Occupational Safety and Health)
Choi, Kwang-Seok (Japan National Institute of Occupational Safety and Health)
Publication Information
Journal of the Korean Society of Safety / v.25, no.5, 2010 , pp. 22-26 More about this Journal
Abstract
The ignitability(minimum ignition energy, MIE) of a suspended dust clouds is very important aspect of technical safety indices. This paper reported the experimental results dealing with the influence of discharge circuit on the MIE of a suspended dust clouds. The movement of a suspended dust clouds was also observed with the high speed camera. The Hartmann vertical-tube apparatus(MIKE-3) described in the international standard of IEC and Polypropylene (PP, 50% volume-average, D50: $761{\mu}m$) resin powders were used in this experiment. The following results were obtained: (1) the MIE of a suspended PP powder depended markedly on the discharge circuit; in other words, when a resistor was connected in series with the discharge sparking circuit(RC), the lowest value(31mJ) of MIE was obtained for a suspended PP powder comparison with the other circuits(C circuit; 370mJ or LC circuit; 71mJ). (2) the discharge duration time is more important than other factors with regard to MIE of a suspended PP powder.
Keywords
electrostatic discharge; discharge circuit; Minimum Ignition Energy; discharge duration time;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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