Study of barrier discharge electrostatic precipitator in a wire-to-square tube configuration
Résumé
In the present experimental work, the performance of a Wire-to-Square tube Electrostatic Precipitator (or WST-ESP) to reduce the quantity of submicron particles using Dielectric Barrier Discharge (DBD) is investigated. First, a comparative study is made with the well known Wire-to-Cylinder configuration (called WC-ESP) having the same active volume. Then, a parametric study is carried out to enhance the collection efficiency of the WST-ESP. The input parameters under study are: the active wire diameter, the ground electrode width and shape and the tube section. The discharge current waveforms show that the discharge mode is diffuse in both ESPs. Results obtained with the aerosol spectrometer show that the particle collection efficiency of both ESPs can reach or even exceed 99%. At fixed electrical power consumption, WST-ESP performs better when the collection efficiency is higher than 93%. The parametric study demonstrated that the wire diameter has a negligible effect on the WST-ESP collection characteristics. However, its performance could be enhanced by putting in parallel several WST-ESPs with reduced section. Also, the extension of the ground electrode and its discretization increase the collection efficiency.