High power factor electronic ballast with intelligent energy saving control for ultraviolet lamps drive
Interest in using ultraviolet (UV) light to disinfect drinking water is growing among public water systems due to its ability to inactivate pathogenic microorganisms without forming regulated disinfection byproducts. Ultraviolet water purification is a unique and rapid method of water disinfection without the use of heat or chemicals. Through the years ultraviolet technology has become well established as a method of choice for effective and economical water disinfection. In order to disinfect properly, conventional UV water-treatment systems keep their light intensity at maximum level regardless of the operating condition; this will result in unnecessary energy waste along with lamp-life-span reduction. In this paper, a UV water treatment system is proposed with intelligent energy saving control of UV lamp For the purposes of energy saving, fuzzy rule based control system is proposed to dim the luminance of the UV lamp according to the measured water flow rate, temperature and amount of impurity.