Performance Prediction and Experimental Investigation of Swirl Atomizer for Evaporation of Water at Low Pressure

This paper describes the swirl Injector performance which finds application in the low temperature sea water spray flash vaporization desalination system. The saline water was sprayed into the vaporizer as fine droplets using a swirl Injector and evaporated at the low pressure. The maximum flow rate was 3600 lit/hr. The injector performance was determined for different feed water temperatures, Vacuum and water injection pressures. Low Pressure Flash Evaporation desalination experiments were conducted by using swirl injector. The effects of atomizer's dimensions and flow parameters were studied and analyzed to get desirable droplet size and good yield. From this parametric study, it is established that droplet diameter in the range of 700 to 900 μ m yields maximum. This result gives a valuable output for studying internal flow behavior in the swirl injector.