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Micro-Hydro-Electrics 

By: Zimbler0 in POPE IV | Recommend this post (2)
Tue, 12 Dec 17 6:40 AM | 28 view(s)
Boardmark this board | POPES NEW and Improved Real Board 		Msg. 40041 of 47202
(This msg. is a reply to 39977 by Decomposed)
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Decomposed> The plan is to get the water a hundred feet or so above ground, then bring it straight down to where I'll have a turbine producing power.


De,
I don't believe the 'final vertical drop' is what
is important. What is important is the water pressure
developed by the total vertical drop. I believe that
the height of the source to the (much lower) height
of the turbine generator is what is important.

I don't think I've worded this well . . .

Run the water pipe near horizontal then turn straight down . . . with a hundred foot vertical structure . . .

Or run it down the face of the hill and feed it into
whatever the turbine design calls for - I don't think
it will make any difference. You should get the same
water pressure either way.

You might try this site :

https://www.homepower.com/articles/microhydro-power/basics/what-microhydro-power

Hydro-electricity is fundamentally the combination of water flow and vertical drop (commonly called “head”). Vertical drop creates pressure, and the continuous flow of water in a hydro system gives us an ongoing source of pressurized liquid energy. Pressurized, flowing water is a very dense resource, and hydro-electric systems convert a very large percentage of the available energy into electricity because the resource is captive in a pipe or flume.

. . .

A simple formula can give you a rough idea of how much capacity your stream might have. Take the head in feet, multiply it by the flow in gallons per minute (gpm), and divide by a factor of about 12. This will give you the potential wattage of a reasonably efficient, small system. For example, if you have 30 gpm available and 40 feet of head, you will be able to generate something in the range of 100 watts [(30 × 40) ÷ 12 = 100). Over the course of an entire day, the generation would be 2,400 watt-hours or 2.4 kWh (24 hours/day x 100 W).

>>>

Zim.




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By: Decomposed in POPE IV
Mon, 11 Dec 17 11:22 AM 		Msg. 39977 of 47202

Zimbler: 

re: " If you were to put the pipe, say, five feet under the ground would that keep it from freezing?"

"Under the ground" is exactly the opposite of what I'd want, though. The plan is to get the water a hundred feet or so above ground, then bring it straight down to where I'll have a turbine producing power.

Or were you suggesting burying the pipe at its start, where it drains the pond? Yeah, I'd have to do something like that. I'll probably run it through the dam a couple of feet below whatever water level I expect. In the dead of winter, I'm sure the ice is at least a foot thick.

I'm just guessing, I don't think I'll have a problem with the pipe freezing. The water will either be flowing or it won't, in which case the pipe will empty itself the way a garden hose running down a hill would. That should keep it from freezing. If I'm mistaken, then I could just have a valve at the dam that shuts the pipe down during certain periods. An empty pipe isn't going to have a problem with winter temperatures. 

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