Electric Discharges and Dielectric Barrier Influence on Electric Field Distribution in Solar Air Heater Systems

The study of electrical discharges and the breakdown manner of some dielectric materials are imperative, essentially aiming at the uniformity of the electric field that occurs between systems. The paper presents the study and simulation of the electric field in the presence of a dielectric screen, between different types of electrodes positioned on the coordinate system, by simulation in the 3D with the help of a modeling and simulation program. The work analyzes the distribution of electrical potential and electric field between electrodes type tip-plate and plate-plate, positioned on the coordinate system. Also, between tip electrode-solar air heater (SAH) panel and plate electrode-solar air heater (SAH) panel. A number of geometric factors are parameterized: the distance between the two electrodes; the displacement, thickness and radius of the dielectric barrier. The results obtained by simulation show that the geometric parameters and permittivity of the dielectric barrier have a well-determined influence on the distribution of the electric field. The presence of a dielectric screen in a range has a positive effect on the dielectric strength in the case of the positive polarity of the tip electrode and a negative effect in the case of its negative polarity. The value of the electric field decreases in direct proportion to the increase in the value of the permittivity, for a 2.1 permittivity the value of the field strength was 769.490*10
³
V/m, decreasing to a minimum value of 216.107*10
³
V/m, when the permittivity was equal to 7.