waterwheel

[mathis]

we have a stream with about 10-15 liter of flow per second and a drop of four metre which I would like to use ! I do have a generator already which will produce 220voltac aswell as 12 voltdc , but will require 1500 rpm !

how do I design the wheel and transmission to meet my requirements ?this hydro setup will be complementary to our existing solar180 watt and wind 100watt power generation for eco friendly house in the south of spain ! I would be gratefull for comments and advice !

[Nando]

FIRST:

Do not use a wheel

SECOND:

Use a Banki

THIRD:

You can get 10 liters * 4 meter* 6 = 240 watts to 360 watts

FOURTH:

A 3/4 or 1 HP induction motor converted to a generator

FIFTH;

You may need a ELC (Electronic Level Controller) -- all depends.

What do yu the energy for, be specific, Please

Regards

Nando

[mathis]

hi , thanx for your comments !

the waterwheel will be charging the batteries just the same as the solar panels and the windmill ! but tell me what is a banki and what is a reversed induction generator ?

[Flux]

A Banki is a crossflow turbine suitable for low head and uses simple blades that can be home produced from pieces of pipe. It is faster and more convenient than a waterwheel.

The induction conversion is an induction motor converted to a permanent magnet alternator by fitting magnets to the rotor.

Have a look at this reference to get some idea of a Banki or Mitchell turbine and to see what I consider an easier type of alternator to build.

http://www.otherpower.com/scotthydro1.html

Flux

[Ex Mek]

  Anyone ever tried a Poncelot wheel , they look easy to make and are suposed to be 80% to 90% efficient

[RP]

Here's an explanation

http://www.waterwheelfactory.com/history.htm

[Flux]

With a small one the leakage past the buckets would result in low efficiency, if you have to use a wheel stick to the overshot but you will loose a lot in the gearing to drive even a low speed alternator.

Unless you are good at making things of wood or something to me a waterwheel seems so much more work than a Banki turbine and allowing for gearing loss the turbine should come out better. The Ossberger mentioned in that last reference is a Banki but you can use a simple nozzle.

Flux

[mathis]

right , thanx for your comments !

I am now thinking to build a banki type of turbine from a 55 gallon drum with waterpockets welded to the outside and an axle through the middle !

I have found a low rev permanent magnet alternator wich I hope to be able to drive with it !

any comments to that plan ?

thanx , mathis

[pyrocasto]

If you used waterpokets(something that holds the water) it wouldnt be a banki, it would be more of a overshot wheel I believe.

Any specs on the PM alt?

[mathis]

I see what you mean ! the banki 'finns' are probably reflecting the water backwards and extract more power that way ?! I'll try and find a way of doing it that way then ! the pm alt has no specs on it , so

i will have to try it to find out ! it has the shape rather like a flying saucer if you know what I mean , and about the same diameter as the 55 gallon drum [ hence my thought of using this drum for the banki ]

[oregoncreek]

How do I do the induction motor converted to a generator wiht the capitors thing.

I lost the link for that.