Effect of Electrode Thickness for Reducing Ozone Generation in Electrostatic Precipitator

Abstract

The influence of electrode thickness on ozone generation in the electrostatic precipitator(ESP) was experimentally investigated. The experimental ESP was two-stage-type which composed of a prechager, followed by the collecting section. The precharger consists of high voltage electrodes and grounded electrodes. The thickness of high voltage electrode was selected as 0.1, 0.2, 0.5 and 0.8 mm and the grounded electrodes was 1.0mm. The collecting electrode section had parallel-plates configuration. The gases emitted from the diesel engine were diluted with air and introduced into ESP in order to measure the particle counts were attributed to saw type electrode. In the present study, the electric field distribution was caluculated using the commercial coad called “Ansys”. The relationship between the ozone generation and collection efficiency was investigated. As a result, the ozone concentration decreased with decreasing the electrode thickness maintaining the same collection efficiency. This result is attributed to decreasing the dissociation area of O₂ in the vicinity of the electrodes.