A fast pulsed power source applied to treatment of conducting liquids and air
A fast pulsed power source applied to treatment of conducting liquids and air
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DOI：
10.1109/27.842885
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发表时间：
2000-02
影响因子：
1.5
通讯作者：
E. Heesch;A. Pemen;P. Huijbrechts;P. Laan;K. J. Prasinski;G. J. Zanstra;P. D. Jong
中科院分区：
文献类型：
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作者：
E. Heesch;A. Pemen;P. Huijbrechts;P. Laan;K. J. Prasinski;G. J. Zanstra;P. D. Jong
开发了两个先导脉冲电源，用于导电液体处理的基础研究和工业演示。研制的大功率电源输出电压为100千伏（上升时间10纳秒，脉冲持续时间150纳秒，脉冲重复率最大1000 pps）。脉冲能量为0.5 ~ 3j /脉冲，平均脉冲功率为1.5 kW，效率约为80%。此外，在高压脉冲源和周围设备之间实现了足够的电磁兼容性。各种应用，例如使用脉冲电场（pef）或脉冲电晕放电使液体或空气中的微生物失活，已经在实验室进行了测试。对于PEF处理，可以在脉冲重复率为10-400 pps的情况下，在高达70 kV/cm的液体中实现均匀电场。荧光假单胞菌的失活率为85千焦/升，蜡样芽孢杆菌孢子的失活率为500千焦/升。直接应用于液体的电晕比PEF更有效。使用直接电晕，革兰氏阳性和革兰氏阴性细菌的每对数降低量均达到25 kJ/L。对于使用我们的电晕脉冲源进行空气消毒，测量到的效率非常高：每log减少2 J/L。
Two pilot pulsed power sources were developed for fundamental investigations and industrial demonstrations of treatment of conducting liquids. The developed heavy-duty power sources have an output voltage of 100 kV (rise time 10 ns, pulse duration 150 ns, pulse repetition rate maximum 1000 pps). A pulse energy of 0.5-3 J/pulse and an average pulse power of 1.5 kW have been achieved with an efficiency of about 80%. In addition, adequate electromagnetic compatibility is achieved between the high-voltage pulse sources and the surrounding equipment. Various applications, such as the use of pulsed electric fields (PEFs) or pulsed corona discharges for inactivation of microorganisms in liquids or air, have been tested in the laboratory. For PEF treatment, homogeneous electric fields in the liquid of up to 70 kV/cm at a pulse repetition rate of 10-400 pps could be achieved. The inactivation is found to be 85 kJ/L per log reduction for Pseudomonas fluorescens and 500 kJ/L per log reduction for spores of Bacillus cereus. Corona directly applied to the liquid is found to be more efficient than PEF. With direct corona we achieve 25 kJ/L per log reduction for both Gram positive and Gram negative bacteria. For air disinfection using our corona pulse source, the measured efficiencies are excellent: 2 J/L per log reduction.