Recently ozone is mainly utilized for the sewerage and home equipments. The demand for ozone will increase in the near future. Therefore, it is expected to improve the energy efficiency of ozone generation and to miniaturize an ozonizer.
In this paper, a new ozone generation system is proposed. In this study, the 50Hz three phase voltage is applied to the discharge tube which has three electrodes. And three kinds of discharges, two silent discharges and a surface discharge are superposed in the same space of the ozonizer. There is no discharge-rest-time in this disoharge mode which generates three kinds of discharges with the phase difference of 120 degrees by potential differences among three electrodes. The effects of the three-phase-superposed discharge mode on ozone generation are investigated by compazing with the individual discharge mode.
As a result, the ozone yield efficiency of this discharge mode becomes nearly equal to that of the silent discharge mode. It is supposed that a synergistic effect occurs among the discharges, because the excited-state oxygen molecules are dissociated accumulatively. Moreover, this discharge mode is able to generate high concentration ozone, because this system can increase the discharge power at low applied voltage. Considering the circumstances mentioned above, it is confirmed that this system improves the energy efficiency of the ozone generation and miniaturizes an ozonizer without using a high-frequency power source.
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