Domestic wind turbines

Quite simple, if you have 1 cubic foot per second and a vertical drop of 20 feet, then you have the potential to produce 1kw.

20feet/6m is a fair old drop to create/have though. You do definitely need a drop then? no point sticking a water turbine type thing in a little stream on a fairly gradual gradient?
 

Y Fan Wen

Member
Location
N W Snowdonia
20feet/6m is a fair old drop to create/have though. You do definitely need a drop then? no point sticking a water turbine type thing in a little stream on a fairly gradual gradient?
It's all to do with the ratio. 2cuft/sec over 10 feet would be the same. So, big river, less drop. Small river big drop. In my own case 1 cuft and 200 feet actually gives 12kw. That's because it isn't actually 20 feet, I think it is 16 or 17 so I get an extra 2kw over 200'.
If I was redoing my site from new I would probably go for about 20kw as the river flow is actually a bit more than our estimate 40 years ago.
The present 8 inch pipe limits the output to 15kw so if the present genny dies (13kw) I would replace it with a 17kw one. The extra kw is so it wouldn't be running at 100% when flat out. I would have to use a 10 inch pipe for 20kw.
 

Badshot

Member
Location
Kent
There used to be weirs all along the river adult until they took them out, I guess they'd have been handy for a water turbine.
EA could be generating a sh!t load of electric with the rivers they control.
 

j6891

Member
Location
Perth & Kinross
Used to have an old mill pond and mill wheel here. Have thought about laying a new pipe/turbine as plenty water in winter when supply is needed. Any recommendations for installers etc?? Scotland based ideally
 

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