An Equivalent Electrode System for Efficient Charging of Filtration Media

2016 ◽  
Vol 3 (3) ◽  
pp. 646
Author(s):  
Mohamed Anwar Abouelatta ◽  
Abdelhadi R Salama
Keyword(s):  
Genetic Algorithms ◽  
Electrostatic Field ◽  
Simulation Method ◽  
Electrode System ◽  
Laboratory Measurements ◽  
Charge Simulation Method ◽  
Accurate Calculation ◽  
Filtration Process ◽  
Onset Voltage ◽  
Ground Plate

<p>This paper concerns the influence of moving an auxiliary limiting cylinder in X-Y directions on the electrostatic field and corona onset voltage of the dual electrode system employed in the electrostatic filtration process resulting in a “Tri-electrode” system. The Tri-electrode system is applied in order to control the field around the ionized wire and on the ground plate. Accurate calculation of the electrostatic field is obtained using the charge simulation method coupled with genetic algorithms. The calculated field values are utilized in computing the corona onset voltage of the ionized electrode. Laboratory measurements of the onset voltage of the ionized electrode are applied. It is found that the limiting cylinder controls the onset voltage of the ionized wire such that the ionized wire may be in ionized or non-ionized state without changing the position of the ionized wire itself. The numerical onset voltage values agreed satisfactorily with those measured experimentally. </p>

Investigations of Electrostatic and Ionized Fields Analysis for Dual-Electrode System

2016 ◽  
Vol 3 (1) ◽  
pp. 80
Author(s):  
Mohamed A. Abouelatta ◽  
Abdelhadi R. Salama ◽  
A. M. Omar ◽  
S. A. Ward
Keyword(s):  
Electric Field ◽  
Electrostatic Field ◽  
Simulation Method ◽  
Electrode System ◽  
Charge Simulation Method ◽  
Density Profiles ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Ion Current Density ◽  
Good Agreement

<p>The paper presents the computation and measurement of electric field, in both electrostatic as well as ionized case, for dual electrode system intended for electrostatic applications. The dual electrode system consists of an ionizing and non-ionizing electrode have the same voltage and facing a grounded collecting plate. The charge simulation method (CSM) coupled with genetic algorithms (GAs) and method of characteristic (MOC) is applied to compute the electrostatic field and the ionized field respectively. The influence of dual system parameters such as ionized wire diameter and inter electrode distances on the profile of the electrostatic field on the collecting plate and on the surface of the ionizing wire has been studied. The measurements of the ionized electric field, current-voltage characteristics and ion current density profiles are implemented using the technique of the linear biased probe. An experimental setup is constructed to model the present electrode arrangement. The measurements are carried out for ionized wire of diameter 0.25 and 0.5mm. The computed results are found to be in good agreement with experiments.</p>

Nano-Tech Power Cables

2021 ◽  
pp. 39-76
Keyword(s):  
Power Law ◽  
Electrostatic Field ◽  
Partial Discharge ◽  
Dielectric Strength ◽  
Simulation Method ◽  
The Novel ◽  
Power Cables ◽  
Effective Parameters ◽  
Charge Simulation Method ◽  
High Quality

This chapter explores the novel nano-metric present-day materials considering power law Profile PLP for redesigning the electrostatic field circulation in the insulation of power cables assessed for scrutinizing charge simulation method (CSM). Moreover, this chapter presents a deep study for using individual and multiple nanodielectrics in power cables manufacturing. An investigation on dielectric strength and partial discharges in the nanodielectrics of power cables is also presented. Furthermore, it offers a detailed theory and effective parameters of partial discharge in nanodielectrics of power cables. Finally, forecast and recommendations are offered for manufacturers to fabricate high quality commercial nano-tech power cables.

scholarly journals Finite Element Solution of the Corona Discharge of Wire-Duct Electrostatic Precipitators at High Temperatures—Numerical Computation and Experimental Verification

Mathematics ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1406
Author(s):  
Hamdy A. Ziedan ◽  
Hegazy Rezk ◽  
Mujahed Al-Dhaifallah ◽  
Emad H. El-Zohri
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
High Temperatures ◽  
Current Density ◽  
Electrostatic Field ◽  
Field Potential ◽  
Simulation Method ◽  
Onset Voltage ◽  
Electrostatic Precipitators ◽  
High Voltage Engineering

Global warming is the greatest challenge faced by humankind, and the only way to reduce or totally eliminate its effects is by minimizing CO2 emissions. Electrostatic precipitators are very useful as a means to reduce emissions from heavy industry factories. This paper aims to examine the performance of wire-duct electrostatic precipitators (WDESP) as affected by high-temperature incoming gases with a varying number of discharge wires while increasing their radius. The precipitator performance is expressed in terms of the corona onset voltage on the stressed wires and the corona current–voltage (I–V) characteristic of the precipitators working with incoming gases at high temperatures. The start of the corona onset voltage on the surface of the discharge wires is calculated for the precipitators under high temperatures based on the standard of the self-repeat of avalanches’ electrons developing on the surface of the stressed wires at high temperatures. For this, calculating the electrostatic field in the precipitators with single- and multi-discharge wires due to the stressed wire with the use of the well-known charge simulation method (CSM) with high-temperature incoming gases is important. The modeling of corona I–V characteristics is adopted using the finite element method (FEM) for single- and multi- (3-, 5-, and 7-) discharge wires of WDESP with high-temperature incoming gases. Additionally, the electrostatic field, potential, and space charge of WDESP are calculated by a simultaneous solution of equations of Poisson, current density, and the continuity current density. A WDESP was set up in the Laboratory of High Voltage Engineering of Czech Technical University (CTU) in Prague, the Czech Republic, to measure the corona onset voltage values and corona I–V characteristics for different WDESP configurations at high temperatures with a varying number of discharge wires while increasing their radius. The calculated values of the corona onset voltage based on CSM and the calculated corona I–V characteristics based on FEM agree reasonably with those measured experimentally with high-temperature WDESP.

Calculation of Power Frequency Electric Field under Overhead Lines with Complex Ground

2013 ◽  
Vol 441 ◽  
pp. 212-216
Author(s):  
Zhen Guang Liang ◽  
Yu Ze Jiang ◽  
Di Wen Jiang ◽  
Zong Jie Liu
Keyword(s):  
Electric Field ◽  
Surface Charge ◽  
Simulation Method ◽  
Three Dimension ◽  
Charge Simulation Method ◽  
Overhead Lines ◽  
Straight Line ◽  
Power Frequency ◽  
Frequency Electric Field ◽  
Distribution Of Electric Field

This paper studied influence of three dimension complex ground on electric field under overhead lines. Surface charge method is discussed and planar triangle surface charge elements are used to represent complex ground. Electric field of overhead lines is analyzed by charge simulation method. Finite straight line charges are used to represent conductors. Then electric field of 220kV double circuit overhead lines over a three dimension small hill is calculated and distribution of electric field 1.5m above the ground is analyzed.

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