AUGMENTATION OF EVAPORATION RATE USING GLASS BASIN STEPPED SOLAR STILL

Abstract

This project mainly focuses on maximising the production of distillled water byemphasizing three important factors: decrease in depth of water, increase in exposure area andtemperature of the saline water. In this work, to augment the evaporation and temperature of thestill basin water, the basin is made by glass material because of its good absorption. The steppedtype basin is composed of four trays. Each tray is detached into top and bottom trays. Thedepending water enters the top trays (evaporating zone) where evaporation takes place dependingon depth provided by the glass strip. The overflow water driven to the bottom tray (heating zone)through the gap provided in the separation glass will be further heated and made to flow throughthe subsequent trays. Modifications such as sponges to increase the exposure area, sensible heatmaterials like sand, and metal scraps to increase the saline water temperature, glass cubes with drysalt, camphor, aluminum scraps and charcoal to increase both saline water temperature andexposure area showed subtle improvement in the production rate. Experimental results werecompared with ordinary basin type still. Theoretical evaluation was also done and is closer to theexperimental values.