Effect of Design and Operational Parameters on Spray Chargeability of Air Assisted Electrostatic Nozzle

Abstract

The success of induction-based electrostatic applications is influenced by the ability of liquid droplets to hold a charge. Dynamic measurement of spray cloud current for assessment of spray chargeability was measured using Faraday cylinder test rig. The chargeability of electrostatic sprays can be improved for more effective use by adjusting the combination of electrode material, the voltage applied to electrode, and the rate at which the liquid flows. Typically, a voltage of 5 kV and a lower flow rate of 60 ml min-1 resulted in higher chargeability, with a spray cloud current of 4.43 µA and a charge-to-mass ratio of 4.43 mC kg-1, while using a copper electrode, as opposed to aluminium and brass electrodes. The findings of this research are expected to aid in more precise and environmentally friendly application of sprays and the development of appropriate and cost economic electrostatic spraying systems.