Convective Heat Transfer Enhancement by Corona Discharge in a Wire–Cylinder Electrostatic Precipitator with the Water-Cooling System

Abstract

A lab-scale wire–cylinder type ESP with the collection electrode cooling by water is used for investigations. The heat transfer coefficient of present system rises with reducing gaseous velocity, increasing applied voltage, corona current or gas temperature. For lowering the overall energy consumption,  the ESP should be operated at a specific mode of low voltage and high current. The ionic wind, which is quantitatively expressed by electro-hydrodynamic number, plays a key role through modifying the gas flow patterns and consequently improving the heat exchange coefficient. And the presence of particle matters is found to further improve the heat transfer coefficient.

Keywords: corona discharge, ionic wind, Heat Exchange, Electrostatic Precipitation