Water is the most abundant resource on the planet, yet less than 1% of the Earth’s freshwater supply is readily available to drink. Lack of accessible clean drinking water cripples communities in many developing countries.
One billion people are living without safe drinking water.
Two million killed annually from waterborne disease, mostly children.
Over half of the world’s hospital beds are filled with people suffering from waterborne disease.
Named after the tool the Biblical David used to deal with Goliath. DEKA set out to tackle the problem of bringing clean water to the world. The Slingshot helps to provide access to clean drinking water resources in areas of the world where access is extremely limited.
How it works
We use vapor compression distillation to purify water.
1. Heat Exchanger
The cold source water is heated as it flows past the warm clean water.
? ?Cold?Source Water
? ?Warm Clean Water
The preheated source water enters the evaporator from the bottom. It’s heated as it rises through the copper tubes. Plastic dowels are placed inside the tubes to restrict flow, creating a thin film of water between the dowel and exposed tube. The copper tube acts as a condenser for the clean steam, aiding in evaporation.
The compressor raises the pressure from 7 to 9 psi. This also increases the temperature of the steam. The difference in temperature allows the steam to condense on the “cooler” evaporator tubes.
The hot steam condenses on the “cooler” tubes producing pure clean water. The condensing steam provides the energy needed for evaporation.
Repeat steps 1~4