A Discussion on the Electrification Characteristics during the Rapid Leak of Hydrogen Gas Containing Dust

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  • <b>ダストを含む水素ガス噴出時の噴出系統での帯電特性の</b><b>考察 </b>
  • ダストを含む水素ガス噴出時の噴出系統での帯電特性の考察
  • ダスト オ フクム スイソ ガス フンシュツジ ノ フンシュツ ケイトウ デノ タイデン トクセイ ノ コウサツ

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Abstract

<p>Hydrogen is expected as the next generation energy. However, there is concern that the serious fire and explosion accidents caused by the static electricity may happen because the minimum ignition energy of hydrogen is considerably small and its flammable range is very wide. Therefore we conducted a series of tests to investigate the electrification characteristics of the hydrogen spouting system when hydrogen leaks rapidly from the crack on plumbing with dust. Iron（ Ⅲ） oxide was used as the sample dust in the spouting system. The spouting system was separated electrically to the straight pipe part and the nozzle part, and the generated currents at each part were measured. As a result, the generated current at the nozzle was much larger than that at the straight pipe. Additionally, the quantity of the specific charge of the dust depended on the mass of iron oxide remaining at the inside of nozzle, and it suggested that the electrification at the nozzle greatly depended on the number of particles that can collide with the wall inside the nozzle.</p>

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