摘要
大气压Ar同轴介质阻挡放电(Ar DBD)在能源化工领域有着广泛的应用,为进一步指导实际应用中DBD反应器结构优化和反应性能提升,通过电气特性、发光特性和温度特性等分析手段,系统研究了激励电源类型对ArDBD放电特性的影响,分析和比较了高频交流、微秒脉冲和纳秒脉冲激励ArDBD的放电均匀性、放电过程产生活性粒子的种类和浓度、放电功率和能量利用率以及反应器温度和热损率。研究结果表明,在相同的激励频率下,和高频交流与微秒脉冲电源相比,纳秒脉冲电源激励Ar DBD的放电均匀性最好,放电产生的活性粒子浓度最大,反应器稳定运行时温度最低,能量利用率最高,热损率最低。在3种电源输入电压为12 kV、频率为4 kHz的条件下,纳秒脉冲电源激励的Ar DBD反应器外壁面温度和内电极温度分别为109.9℃和227.9℃,而高频交流电源激励的Ar DBD对应的温度分别为169.0℃和564.4℃,这种高温条件将增加能量损失,降低能量利用率。在相同的激励条件下,纳秒脉冲Ar DBD的能量利用率为61.4%,显著高于微秒脉冲的40.2%和高频交流的24.1%。该研究从能量高效利用的角度为进一步促进Ar DBD在能源化工领域应用提供了有益参考。
Atmospheric Ar coaxial dielectric barrier discharge(Ar DBD) has attracted significant interests in the field of energy and chemical engineering. In order to guide its configuration optimization and performance enhancement in practical applications, we systematically studied the discharge characteristics of Ar DBD driven by different power supplies including the electrical characteristics, optical characteristics, and operation temperature.Moreover, we compared the discharge uniformity, types and densities of active particles produced during discharge, and analyzed the discharge power and the energy utilization efficiency as well as reactor temperature and heat loss rate. The results show that the Ar DBD driven by ns pulse power supply shows more uniform discharge, higher density of active particles and higher energy utilization efficiency, compared with Ar DBD driven by high frequency alternating-current(AC) power supply and by μs pulse power supply under the same frequency. The ns pulse Ar DBD also has the lowest stable operation temperature, which results in the lowest heat loss rate. In an input voltage of 12 kV and a frequency of 4 kHz, the stable outer wall temperature and inner electrode temperature of the ns pulse Ar DBD are 109.9 ℃ and 227.9 ℃, respectively, while the corresponding temperature of the high frequency AC Ar DBD are 169.0 ℃ and 564.4 ℃. The high temperature condition will enhance the energy loss, which consequently lower the energy utilization efficiency. Under the same excitation conditions, the energy utilization efficiency of the ns pulse Ar DBD is 61.4%, which is significantly higher than that of the μs pulse Ar DBD(40.2%) and high frequency AC Ar DBD(24.1%). This work provides a useful reference for further promoting the application of Ar DBD in energy and chemical industry from the viewpoint of energy efficient utilization.
作者
杨勇
梅丹华
段戈辉
王森
于鹏
方志
YANG Yong;MEI Danhua;DUAN Gehui;WANG Sen;YU Peng;FANG Zhi(College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 211816,China;School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2020年第12期4355-4364,共10页
High Voltage Engineering
基金
国家自然科学基金(51807087
21607074)
江苏省自然科学基金(BK20180705)。
关键词
同轴介质阻挡放电
氩气放电
高频交流
微秒脉冲
纳秒脉冲
放电特性
能量利用率
coaxial dielectric barrier discharge
Ar discharge
high frequency alternating-current
μs pulse
ns pulse
discharge characteristics
energy utilization efficiency
