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Originally Posted by Hersbird
There are 2 different potential energies involved. The height is the main but there is energy in the velocity of water as well.
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https://duckduckgo.com/?q=gravity+vortex+watermill
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Originally Posted by ibid
I remember the first time I encountered a ram pump lifting water without any power input.
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Quote:
Trompe
A trompe is a water-powered air compressor, commonly used before the advent of the electric-powered compressor. A trompe is somewhat like an airlift pump working in reverse.
More at Wikipedia
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