In a bid to help bring greater access to clean drinking water to the developing world, WaterStillar has created a solar-distillation system designed to produce clean drinking water from almost any source. Conceived as a cheap, efficient, modular system that can be scaled up to produce thousands of liters per day, Water Works is installed with no upfront costs and requires minimal maintenance or training to operate.
The WaterStillar Water Works, like nature's water cycle, works by heating water until it evaporates and condenses to rid it of any contaminants. Water is gravity fed into the Works unit. The unit is split vertically into a number of sections, with the water routed evenly into each. The water routed to the lowest section of the unit is heated by vacuum tube solar collectors (thermal solar panels). As it heats up, it begins to evaporate and the resulting vapor rises to the top of the section, leaving any contaminants as run-off. The run-off is recirculated and diluted with fresh source water. When the vapor hits the distillation panel at the top of its section, it condenses to form clean water droplets. Held on by surface tension, the droplets then run down the angled panel to an outlet ready for consumption. The residual heat from each lower layer is used to heat the layer above to maximize efficiency.
See the WaterStillar video
Water Stillar technical development Movie
A standard installation produces 200-300 liters of clean water per day, but can be scaled up to 10,000 liters.
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WaterStillar website
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gizmag article.
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