ABSTRACT In this study, a traditional tubular reactor and an amplitude-modulated AC power supply are employed to develop a unique practical ozone generator with a widely adjustable ozone concentration and simultaneously a constant ozone yield. The amplitude-modulated AC high-voltage waveform driving the discharge consists of the TON (burst of four consecutive AC cycles) and TOFF periods. The characteristics of the ozone generation in air were experimentally investigated at different energy densities, duty cycles and air flow rates, as well as cooling conditions and frequencies. The experimental results show that a unique ozone generator has an almost constant ozone yield of 51.68 ± 2.97 g/kWh in the energy density range of 50–350 kJ/m3, while a wide range of ozone concentration and output can be developed through changing the applied voltage amplitude. A higher ozone yield of can be achieved by decreasing the duty cycle and increasing gas flow rate, while higher ozone concentration can be easily achieved by changing air flow rate. The maximum ozone yield of 92 g/kWh is achieved. In contrast to only a single AC cycle in one complete TON period, changing duty cycle for a consecutive AC cycles in one complete TON period cannot be employed to develop a unique ozone generator with a widely adjustable ozone concentration and simultaneously a constant ozone yield because of different Lissajous figures, discharge energies, positive peaks, negative peaks and their differences for each AC cycle. In addition, the total capacitance of the reactor is not only independent of energy density, duty cycle and cooling condition, but also of AC frequency. A higher AC frequency of the applied high-voltage waveforms leads to a lower dielectric capacitance while increasing gap capacitance.

中文翻译：

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在空气中使用调幅交流电源在同轴 DBD 中产生臭氧

摘要 在这项研究中，采用传统的管式反应器和调幅交流电源开发了一种独特的实用臭氧发生器，臭氧浓度可广泛调节，同时臭氧产量恒定。驱动放电的调幅交流高压波形由 TON（四个连续交流周期的突发）和 TOFF 周期组成。在不同的能量密度、占空比和空气流速以及冷却条件和频率下，对空气中臭氧产生的特性进行了实验研究。实验结果表明，独特的臭氧发生器在50-350 kJ/m3的能量密度范围内几乎恒定的臭氧产量为51.68±2.97 g/kWh，而通过改变施加的电压幅值，可以产生大范围的臭氧浓度和输出。通过降低占空比和增加气体流速可以实现更高的臭氧产量，而通过改变空气流速可以轻松实现更高的臭氧浓度。达到了 92 g/kWh 的最大臭氧产量。与在一个完整的 TON 周期中只有一个 AC 周期相比，在一个完整的 TON 周期中改变连续 AC 周期的占空比不能用于开发具有广泛可调臭氧浓度和恒定臭氧产量的独特臭氧发生器，因为每个 AC 周期的不同 Lissajous 数字、放电能量、正峰值、负峰值及其差异。此外，电抗器的总电容不仅与能量密度无关，占空比和冷却条件，还有交流频率。施加的高压波形的较高交流频率导致较低的介电电容，同时增加间隙电容。