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Hydro Power
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Judgey    Posted 08-20-2004 at 07:30:36       [Reply]  [Send Email]
Hi all,

I would like to generate 100watts of power from a water wheel, I know the principal, eg. Wheel, Pully or cog, Alternator, 12v Battery and thena an inverter I think, but can anybody fill in the specifics.


How many RPM is needed to power what size Alternator to get a constant 100w AC supply. If anybody could help me it would be really appreciated.

Many thanks


screaminghollow    Posted 08-20-2004 at 08:09:29       [Reply]  [No Email]
100 watts really isn't much. There are formulas for calculating volumne of water and distance of fall etc. it is pretty much high school physics. There are some 1,000 watt units available and they are very small using a pelton wheel turbine system. Excluding the piping into the system, they are less than the size of a five gallon bucket. Now, the devices necessary to keep gravel and debris out of the system etc, upstream and the amount of pipe needed depend on your topography. I have been toying with the idea for a few years and have a good flow of 5 or 6 gallons per second and as much as a 60 foot fall available. but that is over a distance of 1200 feet and would require alot of pipe. My ravine is also subject to flash floods during summer cloud bursts and wash outs could be a major problem if not planned well. At one time there was a sawmill downstream and some of the flume supports are still visible on my property. Everybody I talked to has indicated that it would be best to pipe water to a seperate holding/mill pond and allow that to flow back down to to the creek through the generating system. It would be less prone to damage from wash outs.

I met a fella some years back that had a house near the top of a hill. He also had some windmills he picked up cheap. He buried a huge water tank just below the top of the hill and has the rain water from the house flow into the tank. Also, the windmills pump water up into the tank. the water from the tanks flows down the hill back to the pond and through a small hydro system. Everything is under ground.

Salmoneye    Posted 08-20-2004 at 07:58:28       [Reply]  [No Email]

The first two are for educational purposes...The third (which is linked below) is what you are looking for...

I may need one of these too...Thanks for the idea...

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