Experimental studies on influence of different conductivities on water mist charging with electrostatic induction

The electrostatic induction charging has been studied for applications such as pesticide spraying equipment and paint equipment. However, the influences of some parameters, such as induction-electrode configuration, water pressure, and applied voltage towards the electrostatic induction charging of water mist, are still not well known. In this work, the induction-electrode location effect on the water mist was focused. In the experiments, a mechanism in which a spray nozzle system was used to produce water mist was considered. To collect the charged water mist, so that the charge-to-mass could be determined, a stainless steel plate was placed under the nozzle. To inspect the optimum condition of electrostatic induction charge of the water mist with different conductivities, the nozzle-to-electrode distance, voltage and water mist diameter were varied. The charge-to-mass of water mist was calculated from the current at the collecting plate electrode. From the results, the movement of charge in the flow of water mist is discussed.