Numerical Modelling of Mutual Effect among Nearby Needles in a Multi-Needle Configuration of an Atmospheric Air Dielectric Barrier Discharge

Wang, Xiaojing; Yao, Chenguo; Sun, Caixin; Yang, Qing; Zhang, Xiaoxing

doi:10.3390/en5051433

Cited by 11 publications

(6 citation statements)

References 63 publications

(98 reference statements)

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“…Moreover, they showed that increasing the length of the reactor can increase the removal efficiency of NO. In 2011 and 2012, Wang et al [13,17] studied a Multineedle-to-Cylinder Configuration of DBD reactor experimentally and numerically and investigated the effect of needles arrayed structure and needle arrangement on the inner electrode. They showed that by using the Multineedle-to-Cylinder system, higher performance of DBD reactor can be achieved compared to the regular DBD reactor.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the optimization of dielectric barrier discharge reactor for NO<inf>x</inf>treatment

Talebizadeh

Rahimzadeh

Anaghizi

et al. 2016

IEEE Trans. Dielect. Electr. Insul.

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In this paper, a comprehensive study of a DBD reactor is conducted to investigate the optimum operating conditions of the reactor for NOx treatment. For each parameter, the objective is to find the maximum NOx removal efficiency with the minimum consumed power. Different effective parameters of the reactor i.e. electrode length and diameter, electrode and dielectric materials as well as parameters of power generator, i.e. voltage and frequency, are investigated. The results show that for this configuration, the electrode with 20 cm length and 10 mm diameter has the best performance. Aluminum as the inside electrode material and quartz as the dielectric material are selected. Furthermore, the optimum value for the pulse frequency is 16.6 kHz. For the mentioned optimum conditions, the NOx removal efficiency achieved is equal to almost 82% at the input power of 486 W. Furthermore, the highest achieved NOx removal is almost 92% at the input power of 864 W. The results of this paper can be used to reduce the energy consumption of NTP systems to acceptable levels.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the optimization of dielectric barrier discharge reactor for NO<inf>x</inf>treatment

Talebizadeh

Rahimzadeh

Anaghizi

et al. 2016

IEEE Trans. Dielect. Electr. Insul.

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“…The VDBD reactor was widely used for the treatment of NO X and SO X . The structure parameters of DBD reactor have great impact on NO removal efficiency and energy consumption, which has become a research hotspot [14][15][16][17][18][19]. For SOX removal, wet scrubbing can achieve a higher removal efficiency (more than 95%), while, for NOX removal, wet scrubbing has a low removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…There are few studies on the effect of DBD reactor structure parameters on NO oxidation under In 2011 and 2012, Wanget al studied the effect of inner electrode shape on discharge of DBD reactor. They showed that the DBD reactor with multineedle-to-cylinder electrode had better discharge performance than the regular DBD reactor [14,15]. In 2012 and 2013, Wang et al used the mixture of NO and N 2 to simulate the exhaust gas.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Effect of Structure Parameters on NO Oxidation in DBD Reactor under Oxygen-Enriched Condition

Cai

Lü

2020

Applied Sciences

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To improve NO oxidation and energy efficiency, the effect of dielectric barrier discharge reactor structure on NO oxidation was studied experimentally in simulated diesel exhaust at atmospheric pressure. The mixture of 15% O2/N2 (balance)/860 ppm NOX (92% NO + 8% NO2) was used as simulated diesel exhaust. The results show that DBD reactor with 100-mm electrode length has the highest oxidation degree of NOX and energy efficiency. NO oxidation efficiency is promoted and the generation of NO is inhibited significantly by increasing the inner electrode diameter. Increasing the inner electrode diameter not only improve the E/N, but also makes the distribution of E/N more concentrated in the gas gap. The secondary electron emission coefficient (γ) of electrode material is closely related to electron energy and cannot be considered as a constant, which causes the different performance of electrode material for NO oxidation under different gas gap conditions. Compared with the rod electrode, the screw electrode has a higher electric field strength near the top of the screw, which promotes the generation of N radicals and inhibits the generation of O radicals. Rod electrode has a higher NO oxidation and energy efficiency than screw electrode under oxygen-enriched condition.

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“…In 1980s, Morrow was the first to calculate the streamer propagation and the distributions of charged particles based on Possion's equation and continuity equations [32,33]. Afterwards, several scholars worked out many new methods to solve the Possion's equation and continuity equations, therefore, the streamer discharge of different kinds of electrodes was computed [19,[34][35][36][37][38][39][40][41], at the same time, the characteristics of streamer pulses in corona discharges were also measured [17][18][42][43][44][45]. However, little attention has been paid to the variation of charged particles density and development of streamer during corona discharge.…”

Section: Introductionmentioning

confidence: 99%

The role of low air pressure in the variation of negative corona‐generated space charge in a rod to plane electrode

et al. 2018

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The corona-generated space charge may vary in different air pressures, and the quantitative law between the coronagenerated space charge density and air pressure has never been investigated. This work utilised computational approaches to explore the role of air pressure in the variation of negative corona-generated space charge. A negative fluid model in which the air pressure could be varied was built up to calculate the charged-particle density and electric field under different applied voltages. The continuity equations were solved by flux corrected transport algorithm and the Poisson equation was computed by the successive over relaxation method. The variations of important parameters due to air pressure were analysed. The particles densities of electrons, positive ions and negative ions at standard and low atmosphere pressures were computed, which increased markedly due to the decrease of atmosphere pressure. At fixed applied voltages, the exponential decay law between the maximal values of electron/positive ion densities at the head of the streamer and air pressure could be obtained. The quantitative law between the maximal values of electron/positive ion densities at the head of the streamer and the applied voltage, relative air density was also achieved.

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Numerical Modelling of Mutual Effect among Nearby Needles in a Multi-Needle Configuration of an Atmospheric Air Dielectric Barrier Discharge

Cited by 11 publications

References 63 publications

Experimental study on the optimization of dielectric barrier discharge reactor for NO<inf>x</inf>treatment

Experimental study on the optimization of dielectric barrier discharge reactor for NO<inf>x</inf>treatment

Study on the Effect of Structure Parameters on NO Oxidation in DBD Reactor under Oxygen-Enriched Condition

The role of low air pressure in the variation of negative corona‐generated space charge in a rod to plane electrode

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