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Nuclear fusion is a simple idea too, just heat up hydrogen under pressure until it releases more energy than is put in.
originally posted by: Goldenwilys
I have a simple idea that should work. We'll in theory. My idea is taking salt water and pump it up front of a hill as it falls down the front of the hill it will be superheated by many fresnel lenses in a enclosed tube as it superheats the water and the tube the steam goes up and over the hill cools then condenses into fresh water. I'm not a scientist or an engineer but I think this would work. Thoughts?
Those do require external energy in the form of the kinetic energy of flowing water so you can't say "that requires absolutely no external energy", unless you want to be wrong.
originally posted by: MysterX
There are ways to pump fluids using hydraulic pressure that requires absolutely no external energy...can even pump water up hill using the same principles.
At night the same energy free pumping can produce energy using micro water screws / turbines inside the tubes, using gravity as the power source.
Look up "Hydraulic Water Ram Pump" and "Water Hammer" for more information on these devices.
My take was it's half solar still and half solar-powered hydroelectric or something like that.
originally posted by: pteridine
www.techedmagazine.com... shows a solar still. Is this what you are describing?