Principle of operation: 
The design of the evaporative system was based on the principle of evaporation being always accompanied by a cooling effect to its surrounding. It is a system which (comprises four sides) covers with the jute pads at all the four sides. Air is allowed to pass through jute pads into the system with the help of suction fans. Water drips into the jute pads at a constant rate through a water distribution system. Fans draws air from outside the fridge through the moistened material. As the air passes through the moistened material, it is cooled by evaporation and this cool air spread in the fridge. Evaporation will takes place when humidity is below 100% and the air begins to absorb water.