Hydro electric plants are not closed systems, the rely on the energi in a river or waterfall or whatever as an EXTERNAl source of energy.I you read the wiki article posted above the difference is explained.
"In this house, we obey the Laws of Thermodynamics"Homer J. Simpson
Most of our systems get their energy directly or indirectly from the sun
QuoteEddie, the pump is *much* less than 100% efficient as is the turbine and the generator. Some, less than 50% efficient. At each step you lose energy so where does the extra come from? Wishful thinking? Ok, but wouldn't the gears make up for the loss of efficiency? I could get gears to turn the generators who knows how many more times then the turbine AND multiple generators??? all with the same pumps, heck even add another turbine ...
Eddie, the pump is *much* less than 100% efficient as is the turbine and the generator. Some, less than 50% efficient. At each step you lose energy so where does the extra come from? Wishful thinking?
If you want a lot of energy what you need is a 2m receiver and about 1km of 1cm wide copper wire. Build a Dyson-Harrop satellite and it will give you 1027Watts of power. Roughly a billion, billion gigawatts.
http://zimmer.csufresno.edu/~fringwal/stoopid.lisI like this one : "Heavier than air flying machines are impossible." -- Lord Kelvin"There is not the slightest indication that nuclear energy will beobtainable." -- Albert Einstein, 1932
They were wrong about -something, ever- so you must be right?
I shall seek funding
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