Testing the Effect of Negative Electric Discharge on Fog

This study investigates the possibility of reduction of fog collected in the closed container with the help of negative electric discharge (Negative Air Ions). For construction of negative electric discharge a high voltage power supply is designed and developed indigenously. The high output voltage is developed by using isolation transformer, autotransformer, and high voltage neon transformer and it is converted into DC voltage by using Wheatstone bridge circuit and high voltage capacitor. Formation of negative corona and voltage-current characteristics of corona ionization was studied. By adjusting -9 kV electric voltage to discharge electrode, the performance of this circuit was tested for removal of fog, generated by using ultrasonic water fogger collected in closed glass container. Various runs were carried out. The light intensity was measured for each run as a function of time, in presence and absence of negative air ions generated by the discharge electrode of the designed ion generator. After operating this device continuously for 6 minutes, 93% to 98% of the aerosol particles were removed from container in addition to the natural decay effect.