An evaporative cooler produces effective cooling by combining a natural process - water evaporation
with a simple, reliable air-moving system Evaporative cooling is the most economical and effective
means of refrigeration and air cooling since its inception particularly in the areas where climatic
conditions are hot and dry. In Rajasthan (India), during summer Dry Bulb Temperature (DBT) of air may
reach up to 48 ˚C while relative humidity stays below 50%. During present study efforts were made to
make evaporative cooling system more versatile. In the process of study a cooler cum refrigerator has
been developed which can be utilized for the purpose of air cooling, drinking water cooling viz. a viz.
storing the vegetables and medicines without altering the performance of desert cooler. The energy
saving by doing so is saved more than 30 W. A small size desert cooler can cool more than 24 liter water
per day up to the Wet Bulb Temperature (WBT) of outside air as well as could store vegetables for more
than five days.