
David asks…
going green with a water wheel?
I have a river in my back yard and I have been researching putting a water wheel in to produce power. But nowhere does it say how fast the generate would have to spin. Or how big it needs to be.
admin answers:
These guys sell the things and should be able to guide you
http://www.ampair.com/ampair/waterpower.asp

Steven asks…
water wheel electricity?
wat is the best way to use a water wheel to power a house, equipment-wise?
admin answers:
Farms used to use wind generator systems that charged a bank of batteries and the household appliances used the batteries for power. I would approach the problem in a similar way in that I would use an alternator or generator to charge batteries. I would then use semiconductor invertors to change the battery power to 120 Volt 60 Hz house power. The battery bank would have to be quite large, possibly using golf-cart batteries. The invertor again would have to be large. I suspect the best way to do the system would be to supply each fused (circuit breaker) line in the house with a separate inverter. I bought a 2000 watt/4000 watt peak, inverter for a little over $100. This will supply about 15 Amps at 120 volts.
You really have to think this through. I don’t know how to connect a water wheel to an alternator, although the power is available, the speed of the wheel vs. The required alternator speed is large.
Hope this helps.

Helen asks…
Could anyone tell me how to convert water to electricity using a water wheel?
i was wondering how i could power my home using water
admin answers:
You don’t convert water to electricity, you convert gravity to electricity.
You need ‘head’ which relates to the height of the water. You then have a hydraulic gradient between two (or more) points. It is possible you already have that gradient and pressure in which case you only need the wheel. If you don’t have the head, you may need to create it using a reservoir coupled to a race. In the race is the waterwheel.
Water wheels may be either vertical or horizontal. Efficiencies may be as high as 70% (with backshot wheels). Most powerful wheel was about 100hp but don’t expect that sort of power unless you have a lot of water available.

Carol asks…
What is the best fan blade design to optimize wind production with low power?
The blades must create very little friction, as the fan is going to be powered by a water wheel. It has to be made of common household objects, and must use little power. What shape and at what angle should the blades be to create the most wind?
We are making an evaporative cooler to help people who cannot afford more expensive air-conditioning. Thank you for your help.
admin answers:
There are several types of designs
kaplan
http://images.google.ca/images?gbv=2&hl=en&sa=1&q=kaplan+turbine&aq=1&oq=kaplan&start=0
Francis
http://images.google.ca/images?gbv=2&hl=en&sa=1&q=francis+turbines&aq=0&oq=francis+turbine&start=0
pelton
http://images.google.ca/images?gbv=2&hl=en&sa=1&q=pelton+turbines&btnG=Search+images&aq=f&oq=&start=0
These are water turbines, the objective is always to recuperate as much energy as possible
the same goes with the fan
the particular design depends on how much pressure, the speed of rotation, the speed of the air flow…
No simple thing!
But worth lots of fun to experiment, good engineering
in your example you may also need some transmission to convert the speed of the water turbine as it will probably not spin fast enough for the air turbine
Guru

Ken asks…
Were can I get a good water turbine to hook up to a water wheel?
I want to power a 1000 volt light fixture.
admin answers:
You are probably wanting to power a 1000 Watt AC fixture. There is really a lot more information that would be useful to ascertain what would be the best configuration for your set-up.
What is running the water wheel? Is it a natural flowing stream of some sort? Or is the water run from a pump? If it is a natural source of water then you might just be able to run a generater directly off of the water wheel.
There are lots of different generators, you will have to calculate RPM at the shaft requirements to find if you can attain 1000 watts of power at 125V AC. It might be simpler to do a system similar to the link below in DC.
There are all kinds of options, depending on your requirements. Sounds like a fun project… Good luck.

Mark asks…
What were the first water driven tools ever made?
i can only think of the water wheel….in what ways did man utilize the power of water?
admin answers:
They irrigated Fields for crops
http://www.uncp.edu/home/rwb/egyptian_pump2.jpg
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