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PostPosted: Dec 28th, '08, 02:14 
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badflash wrote:
If you have access to running water, you should check out a hydraulic ram.
http://www.atlaspub.20m.com/rampg.htm
That is a very interesting RAM design!

I want to use the ram pump - no power/low maintenance - but had thought I would need to get enough head to get it started and keep it going. That was my problem. I have a strong flowing river but there is little head.
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All that is really required is the surface water source. The water has to be moving...not much, but some. The creek need not be large either - 4 gallons per minute is the minimum.
I wonder how high such a design could pump water up on a faster flowing river.

I have fancied the spiral wheel to lift water from the river flow... also known as a coil pump. Then from a top tank to go in series with ram pumps. This ram design seems to be able to do the job right from the river! First time I ever read that....


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PostPosted: Dec 28th, '08, 04:21 
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If you have strong current but low head, a Savonious rotor can be used as a low cost power source. They can be made from barrels cut in half. See http://www.juliantrubin.com/encyclopedi ... rbine.html


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PostPosted: Dec 28th, '08, 07:48 
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Cool wind turbine. Thanks for sharing.
T.


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PostPosted: Dec 28th, '08, 13:13 
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Not just wind. It works better in water. Bearings need more attention though.


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PostPosted: Dec 28th, '08, 15:36 
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badflash wrote:
If you have strong current but low head, a Savonious rotor can be used as a low cost power source. They can be made from barrels cut in half. See http://www.juliantrubin.com/encyclopedi ... rbine.html

Interesting. I did see this video on the same principle. Managed to find it again. Didn't think to use this principle in water.
http://www.youtube.com/watch?v=9UPe6A_UVPc
Here is part 2 where he cuts gears to link the turbine to an alternator to generate power
http://www.youtube.com/watch?v=24LSnATI ... feature=iv


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 Post subject: Compression and storage
PostPosted: Jan 1st, '09, 05:46 
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Another thought: use a series of airtight canisters (propane, for example) to store air compressed via a mechanical compressor/wind turbine combination.

Potentially more complicated to do safely, and there are potential temperature problems, but it might work in a warm climate.


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PostPosted: Jan 2nd, '09, 02:12 
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The S-Rotor also works layed on it's side. That is handy in shallow water.


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