Study of DBD Precipitator Energized by a Modified Square Waveform Voltage

This experimental work is aimed at evaluating the effects of high voltage waveform (modified square waveform) on the collection efficiency of a wire-to-square tube electrostatic precipitator using dielectric barrier discharge. The experiments are performed with incense smoke particles having a mean size of about 0.32 mu m. An aerosol spectrometer is employed for characterizing the size distribution of these particles at the outlet of the electrostatic precipitator. The collection efficiency is estimated for various applied voltages (ranges: 4 to 20 kV) at fixed frequency (100 Hz) and flow rate (10 L.min(-1)). The input parameters under study are the pulse duration, the rise and fall times, the presence of an Offset, and the plateau of the high voltage. The experimental results show that the square waveform with modified plateau is able to increase the performance of the electrostatic precipitation.