Hydroelectric power

Ok, I'm not too much of an engineer (or architect), so I may be WAY off on this. I'm planning on installing a hydroelectric generator, but I have encountered a problem. One of the factors involving power generated is "head", which is the vertical distance the water falls to the turbine. However, since I am pumping water a different way, would it be possible to generate power with horizontal moving water? (0 head) I made a diagram, but I'm no artist either, so it's very basic.

i48. tinypic .com/2qc4dag.jpg

So basically, water is pumped from a well, up, into a building, through horizontal tubing, falls into a small pond, then leaves the building. Where should I put the turbine? Thanks.

EDIT: Forgot to mention, I can't post links, so take the spaces out of the link. Sorry about that.

 

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I can not see your diagram, but put the water where ever the most water flow will be at any giving time.

 

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Ever heard of a water mill?

So you ARE using head.

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Most of the useful energy will come from the vertical fall, so you'd be better off putting it in the fall.
Otherwise you're going to need very fast flow rates.

Why are you using a pump and then extracting power? You're going to suffer losses. What's wrong with just using the power source for the pump directly?

 

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Actually, I'm not using power to pump it up. It is pumped solely by natural pressure. And, I can't find a practical place to put the turbine at the bottom of the fall.

 

Ah okay.
Then your best bet is to put the turbine as close to the source as possible. That way you're taking advantage of it as much as you can before you lose any pressure/ volume of flow.

 

Thanks Dywyddyr for helping me out. However, if I put the turbine at the source, I'll have a negative head, is this possible?

Also, I've got around 35lps, if that helps. It's about a 7ft drop from the pipe to the surface of the pool.

 

If the water is coming out under any pressure (as I assume it is because you've said it's not being pumped upwards) then the turbine will use that pressure.

 

See, this is where my problem lies. I can't have it at the source because it is just enough pressure to pump it up. Using a turbine at the source might reduce the pressure too much. I'm planning on turning an old washer motor into a generator. Will this be within the range of generat-able (?) power, or will it not supply enough? Sorry, I've never dealt with anything like this before.

 

of course you can generate energy. but it will not be effective. because you have to flow the water. but in case of the vertical fall. the speed of the water or head will increase due to gravity. so you will get enough power. it will be cost effective.