MANGALURU: A unique machine designed by four final year engineering students of Shree Devi Institute of Technology (SDIT) is capable of generating potable water from thin air These budding engineers have developed 'Rooftop Water Generating Machine' as part of their study project which they are required to undertake. The machine, which was designed by students Kartik K Jadhav, Prithesh D K, Prithesh Naik A and Rajath J K works on the principle of extracting water by condensing the water vapours found in the atmosphere in the form of humidity.Harsha GO, assistant professor in the department of mechanical engineering, who guided the students, said the machine will provide an effective solution to water scarcity. The machine, which was designed spending about Rs 35,000, is capable of producing around 50 litres of water per day, he said."At a time when water scarcity is hitting everyone badly especially during summer, this innovative equipment invented by the students could provide a cheap, effective and permanent solution. This technology offers pure drinking water 365 days a year and it is an environmentally safe source of sustainable water," he said.On the functioning of rooftop water generating machine , Harsha said the machine consists of a compressor, evaporator coils, condenser, air filter and water collecting tank. In addition, an external power source is required to activate and run the machine.The machine first sucks air from the atmosphere. The suction is directed through air filters in order to keep out minute impurities and contaminants contained in the air. The condenser coils are used to release hot air formed in the machine and the compressors help to maintain the elevated pressure needed to drive the cycle.A controlled speed fan pushes filtered air over the coil, where it condenses under pressure to form water, which is collected and passed through filters and purified, he explained. "It is cost effective and flexible enough to accommodate seasonal variations in humidity. In monsoon when adequate natural water is available, the machine can switch over and double as a water purifier ," said SDIT principal Dileep Kumar K.

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