日本語フィールド
著者：Satoshi Ihara, Tomohiro Sakai, Yuuki Yoshida and Hiroki Nishiyama題名：Fundamental Characteristics of Discharge Plasma Generated in a Water Cavitation Field発表情報：Journal of Electrostatics, 巻: Vol. 93 ページ: pp. 110-117キーワード：Plasma, Cavitation, Waste water, Water treatment概要：抄録：In this study, the fundamental characteristics of discharge plasma, which is produced in water cavitation fields, was investigated experimentally. A high voltage was applied across the electrodes located in the cavitation field inside the treatment reactor. The maximum applied voltage corresponding to the discharge onset voltage was approximately 1 kV. The power consumption P of the reactor was measured as the conductivity of the treatment water was varied by changing the NaCl concentration up to 3.0% and as the frequency of the applied voltage was varied from 10 to 30 kHz. The power consumption P had a peak value during the changes in the conductivity of the treatment water. The emission intensity from ·OH and O in the plasma decreased as the conductivity increased. The emission from ·OH was detected at an NaCl concentration of 2.5%. The energy deposited to the plasma Ep and the conduction current in water Ew were estimated from the voltage and current waveforms. The Ep/Ew ratio, which is an important factor for efficient treatment, was approximately 3% at an NaCl concentration of 0.7% and a frequency of 10 kHz. This ratio increased to approximately 8% when the frequency was increased to 20 kHz. The experimental results indicated that increasing the frequency is an effective way of improving the treatment efficiency.英語フィールド
Author：Satoshi Ihara, Tomohiro Sakai, Yuuki Yoshida and Hiroki NishiyamaTitle：Fundamental Characteristics of Discharge Plasma Generated in a Water Cavitation FieldAnnouncement information:Journal of Electrostatics, Vol: Vol. 93 Page: pp. 110-117Keyword：Plasma, Cavitation, Waste water, Water treatmentAn abstract：In this study, the fundamental characteristics of discharge plasma, which is produced in water cavitation fields, was investigated experimentally. A high voltage was applied across the electrodes located in the cavitation field inside the treatment reactor. The maximum applied voltage corresponding to the discharge onset voltage was approximately 1 kV. The power consumption P of the reactor was measured as the conductivity of the treatment water was varied by changing the NaCl concentration up to 3.0% and as the frequency of the applied voltage was varied from 10 to 30 kHz. The power consumption P had a peak value during the changes in the conductivity of the treatment water. The emission intensity from ·OH and O in the plasma decreased as the conductivity increased. The emission from ·OH was detected at an NaCl concentration of 2.5%. The energy deposited to the plasma Ep and the conduction current in water Ew were estimated from the voltage and current waveforms. The Ep/Ew ratio, which is an important factor for efficient treatment, was approximately 3% at an NaCl concentration of 0.7% and a frequency of 10 kHz. This ratio increased to approximately 8% when the frequency was increased to 20 kHz. The experimental results indicated that increasing the frequency is an effective way of improving the treatment efficiency.