Surface temperature profiles of the corona wire in a plate-wire type electrostatic precipitator

The corona wire surface temperature profiles in a plate-wire-type electrostatic precipitator have been measured by an IR thermal image technique and thermocouples under both DC positive and negative corona discharge conditions. The results show that: the corona wire surface temperature profiles under positive coronas are more uniform than those of the negative coronas, where the differences between maximum and minimum temperatures for positive and negative coronas are 0.5°C and 6°C, respectively; the theoretically calculated corona wire surface temperature always overestimates surface temperature, since a relatively significant electrohydrodynamic cooling can control corona wire surface temperature; and for a negative corona, the corona wire vibration frequency decreases slightly with increasing applied voltage