The gravitation water vortex power plant is a type of micro hydro power plant which is capable of producing energy using a low hydraulic head of 0.7–3 metres (2 ft 4 in–9 ft 10 in). The technology is based on a round basin with a central drain. Above the drain the water forms a stable line vortex which drives a water turbine.

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Energy producing in-pipe water turbine - harnessing energy from things we already use

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Wind-powered device can produce 11 gallons per day of clean drinking water from the air : TreeHugger

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Ryan Jongwoo Choi, ES Pipe Waterwheel, hydroelectricity, turbines, water turbines, waterwheels, piezoelectricity, hydro power

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While trying to find a method for aerating water without energy input, Austrian engineer Franz Zotlöterer stumbled across the idea of a mini-power plant which is simple to construct and has a turbine efficiency of 80% but which is safe for fish due to

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