Works also well in the Fetzer Valve ;D http://www.runoffgroove.com/fetzervalve.html.PRR said:A 3/2 power law was well established in water power turbine design.
Probably an underrated genre...PRR said:From an informal essay
PRR said:> fresh water or salt water?
The bear is white.
There are nearly no salt-water turbines. 99.99% of all the salt water on earth is all at the same level. There's a few large salt lakes, but they are salt because there's no handy place to run the water out.
Bay of fundy canada...joaquins said:PRR said:> fresh water or salt water?
The bear is white.
There are nearly no salt-water turbines. 99.99% of all the salt water on earth is all at the same level. There's a few large salt lakes, but they are salt because there's no handy place to run the water out.
I think there is some energy generation with salt water, I don't know where though... From the waves you could take some energy but not with turbines. Also with the tidal wave you could store the water at the high level and then let it go down by a turbine, and could generate when it's rising and with descendant as well. I don't know if this is being done but up to a few tens of meters between levels could be found in some places.
JS
PRR said:You are correct; I am an idiot.
;D ;D PRR is not an idiot in any company....CJ said:if he is an idiot then that makes me an amoeba,
While perhaps valid, there so much power much easier to collect...let's throw this into the mix>
"Osmotic power or salinity gradient power is the energy available from the difference in the salt concentration between seawater and river water. Two practical methods for this are reverse electrodialysis (RED) and pressure retarded osmosis (PRO). Both processes rely on osmosis with ion specific membranes. The key waste product is brackish water. This byproduct is the result of natural forces that are being harnessed: the flow of fresh water into seas that are made up of salt water.
In 1954 Pattle[1] suggested that there was an untapped source of power when a river mixes with the sea, in terms of the lost osmotic pressure, however it was not until the mid ‘70s where a practical method of exploiting it using selectively permeable membranes by Loeb [2] was outlined.
The method of generating power by pressure retarded osmosis was invented by Prof. Sidney Loeb in 1973 at the Ben-Gurion University of the Negev, Beersheba, Israel.[3] The idea came to Prof. Loeb, in part, as he observed the Jordan River flowing into the Dead Sea. He wanted to harvest the energy of mixing of the two aqueous solutions (the Jordan River being one and the Dead Sea being the other) that was going to waste in this natural mixing process.[4] In 1977 Prof. Loeb invented a method of producing power by a reverse electrodialysis heat engine.[5]
The technologies have been confirmed in laboratory conditions. They are being developed into commercial use in the Netherlands (RED) and Norway (PRO). The cost of the membrane has been an obstacle. A new, lower cost membrane, based on an electrically modified polyethylene plastic, made it fit for potential commercial use.[6] Other methods have been proposed and are currently under development. Among them, a method based on electric double-layer capacitor technology.[7] and a method based on vapor pressure difference.[8]
JohnRoberts said:...from sun light heating the earth.
JR
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