ACTIVE ELECTRODE SHAPE EFFECT ON THE CORONA DISCHARGE IN AN ELECTROSTATIC PRECIPITATOR\

2017 ◽  
Vol 16 (11) ◽  
pp. 2545-2551
Author(s):  
Nouri Hamou ◽  
Aissou Massinissa ◽  
Aitsaid Hakim ◽  
Zebboudj Youcef
Keyword(s):  
Corona Discharge ◽  
Electrostatic Precipitator ◽  
Shape Effect ◽  
Active Electrode ◽  
Electrode Shape

scholarly journals Comparison of I-V Curves Between the Experiment of Corona Discharge on Gradient Line-To-Plane (GL-P) Configuration and The Mathematical Approach

2021 ◽  
Vol 3 (2) ◽  
pp. 155-164
Author(s):  
Susilo Hadi ◽  
Asep Yoyo Wardaya ◽  
Zaenul Muhlisin ◽  
Jatmiko Endro Suseno ◽  
Pandji Triadyaksa ◽  
...  
Keyword(s):  
Corona Discharge ◽  
Characteristic Curve ◽  
Mathematical Formulation ◽  
Electrical Current ◽  
Electrical Circuit ◽  
Multiplication Factor ◽  
Mathematical Study ◽  
Active Electrode ◽  
Electrode Shape ◽  
Gradient Line

Research has been conducted on the comparison of the I-V characteristic curve between mathematical study and experiment of the generation of negative DC corona discharge in the Gradient Line-to-Plane (GL-P) electrode configuration. The reason for this research is to calculate the suitability of the corona discharge electrical current between the mathematical and experimental study. The active electrode used has length 2 cm and height 4 cm. This research is conducted with variations in the sharpness angle of the active electrode (θ) 300, 450, and 600 and variations in the distance between the electrodes () 2 cm, 3 cm, and 4 cm. The mathematical formulation of the value of the corona discharge electrical current in the configuration of the GL-P electrode is obtained by using the geometric concept approach, which is the formulation of the capacitance value of the ordinary electrical circuit, with the addition of the multiplication factor value k in the sharp area of the active electrode, because in that area the greatest plasma flow distance is obtained. The value of the multiplication factor  is obtained by fitting the curve between mathematical study and experiments. The I-V curve between the mathematical study and the corona discharge generation experiment has a high degree of similarity with the smallest percentage contacting point of 37.50%.The value of the multiplication factor  is influenced by the sharpness angle of the active electrode shape and the distance between the electrodes.

Numerical Study for Effect of Staggered Wire Electrodes in a Electrostatic Precipitator

2019 ◽  
Author(s):  
Hoyeon Choi ◽  
Yong Gap Park ◽  
Man Yeong Ha
Keyword(s):  
Electric Field ◽  
Corona Discharge ◽  
Reference Frame ◽  
High Voltage ◽  
Current Density ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Electric Force ◽  
Wire Electrode ◽  
Particle Charging

Abstract In this paper, a numerical model was developed to describe the wire-plate electrostatic precipitator, commonly called electronic air cleaners. Electrostatic precipitator have been widely used to control particulate pollutants, which adversely affect human health. In this model, the complex interactions between fluid dynamics, electric fields and particle dynamics are considered. Therefore different approach methods are used in this study for each field, Eulerian reference frame was used for the fluid flow field and the electric field, Lagrangian reference frame used for the particles trajectories. In order to describe corona phenomena around high voltage electrode, electric field and ion current density field in electrostatic precipitator are numerically calculated using the iterative method for corona discharge model suggested by Kim (2010). The most important concept in electrostatic precipitator is the electric force applied to particles through the particle charging phenomena. The charge acquired by the particle in the corona region was obtained by combining the field charge, the diffusion charge and the time available for charging being the residence time of the particle in the corona region. In order to simulate more accurately, the charging model suggested by Lawless (1996) is used for the charging phenomena of particles by corona discharge because this model was designed to predict combination effect of diffusion charge and field charge. The diminution of particle concentration along the collection plate was derived from Deutsch’s theory, and migration velocity of the particle was developed from the condition that the magnitude of Coulomb force is equal to that of Stoke’s resistance force. This model is implemented by UDF in commercial software Fluent and validated with experimental and numerical results from literatures. CFD results had been compared with various experimental data obtained by Penney&Matick, Parasram and Kihm. Our results shows good agreement in terms of distributions of electric potential, current density, electrohydrodynamic flow pattern, and particle trajectories as well as corona current and collection efficiency. From this simulation, the effect of wire arrangement on electrostatic precipitator characteristics and particle charging are investigated. Both inline and staggered arrangements of wire electrode have been considered for fixed values of gas velocity equal to 2m/s. Applied voltage on wire electrode varies 6∼13kV and particle diameter is 4μm. For low voltage condition, staggered arrangement of wire electrode caused the turbulent effect so that collection efficiency increase more than inline arrangement. However, collection efficiency decrease in high voltage condition because electric force applied on particles passing between the wire electrodes is canceled out by both side wire electrodes.

Exploring the role of sulfuric acid aerosol in corona discharge through a honeycomb wet electrostatic precipitator

2021 ◽  
Vol 146 ◽  
pp. 763-769
Author(s):  
Yifan Wang ◽  
Wenchao Gao ◽  
Xuefeng Zhang ◽  
Hao Zhang ◽  
Wenju Liu ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Corona Discharge ◽  
Electrostatic Precipitator

Electrohydrodynamics in an electrostatic precipitator

1981 ◽  
Vol 108 ◽  
pp. 1-18 ◽  
Author(s):  
T. Yamamoto ◽  
H. R. Velkoff
Keyword(s):  
Corona Discharge ◽  
Secondary Flow ◽  
Close Agreement ◽  
Electrostatic Precipitator ◽  
Numerical Results ◽  
Theoretical Studies ◽  
Flow Interaction ◽  
Flow Interactions ◽  
The Wire ◽  
Experimental And Theoretical Studies

Experimental and theoretical studies were undertaken to investigate the particulatefree secondary flow interaction in the wire-type electrostatic precipitator. The secondary flow generated by the corona discharge is not negligible, and strong flow interactions take place owing to the induced circulatory cells. The calculated numerical results demonstrate close agreement with experiment.

scholarly journals 3D-PIV Measurement for EHD Flow of Spiked Tubular Electrode Corona Discharge in Wide Electrostatic Precipitator

2020 ◽  
Vol 20 (4) ◽  
pp. 178-186
Author(s):  
Dongjie Yan ◽  
Ziang Zhang ◽  
Zhenyang Li ◽  
Ya Yu ◽  
Hao Gong ◽  
...  
Keyword(s):  
Corona Discharge ◽  
Flow Velocity ◽  
Fine Particles ◽  
Electrostatic Precipitator ◽  
Three Dimensional ◽  
Primary Flow ◽  
Cross Sectional ◽  
Piv Measurement ◽  
The Impact ◽  
Tubular Electrode

AbstractThe electrohydrodynamic (EHD) flow induced by a corona discharge has an important influence on the movement and collection of fine particles in an electrostatic precipitator. In this paper, three-dimensional particle image velocimetry (3D-PIV) is used to investigate the impact of different primary flow velocities and applied voltage on diffusion and transport of the spiked tubular electrode corona discharge EHD flow in a wide type electrostatic precipitator. In order to measure the flow characteristics of different positions of a spiked tubular electrode, the PIV measurements are carried out in several cross-sectional planes along the ESP duct. From 2D flow streamlines, in plane 1 (where the tip of the spike is oriented in the direction of primary flow), the velocity of the counter-clockwise vortex caused by the EHD flow near the plate decreases as the primary flow velocity increases. However, in plane 3 (where the tip direction is opposite to the primary flow), two vortices rotate adversely, and the flow velocity of the clockwise vortex near the plate increases as the primary flow velocity increases. Flow velocity increasing near the plate makes the particles deposited on the plate more easily to be re-entrained. It can be found in the three-dimensional analysis of the flow field that there are mainly “ascending vortex” and downward tip jet in the three observation planes. There is a discrepancy (in terms of distribution region and the magnitude of velocity) between the three-dimensional characteristics of these vortices and tip jets in the different cross-sectional planes.

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