- #1
D-C
- 13
- 0
Hi all. I'm feeling a little new here. Here's the deal. Question involving my micro-hydro installation. Pretty basic in this crowd I would guess but a chore for me, and am not sure the numbers I come up with end up making practical sense. I've been tinkering with it for years, but still seem to manage to get a very paltry amount of power out of quite a bit of water, falling a long ways. All home-made or scrounged materials with the exception of the 5-1/4 in. split cup Pelton impeller.
If the weight of water works out to .43333 lbs/sq.in/foot, and my static pressure at the nozzle/valve is 34psi that would put my head just under 80' (78.5).
The 600 or so feet of pipe is sized well enough that with my largest nozzle, (Rain Bird) 17/64, or about .28 in, dynamic pressure is only 2 lbs less, 32psi. A little tough running that into a container there in the gully, but a gallon in 5 secs = 12/Min... 17,280/Day. (if I cut some brush and devise a better way to catch the water in a larger container I could be more accurate!)
(I do have nozzles down to .22)
So I'm dropping about 12 gals a minute 80 feet and measuring under 3 Amps of 12 volt. (2.6-2.8), or around 30 watts. I've been off the grid for over 30 years, this is my main power when the sun isn't shining.
Any thoughts on if/how it might be improved would be very welcome!
And...am I even in the ballpark?
If the weight of water works out to .43333 lbs/sq.in/foot, and my static pressure at the nozzle/valve is 34psi that would put my head just under 80' (78.5).
The 600 or so feet of pipe is sized well enough that with my largest nozzle, (Rain Bird) 17/64, or about .28 in, dynamic pressure is only 2 lbs less, 32psi. A little tough running that into a container there in the gully, but a gallon in 5 secs = 12/Min... 17,280/Day. (if I cut some brush and devise a better way to catch the water in a larger container I could be more accurate!)
(I do have nozzles down to .22)
So I'm dropping about 12 gals a minute 80 feet and measuring under 3 Amps of 12 volt. (2.6-2.8), or around 30 watts. I've been off the grid for over 30 years, this is my main power when the sun isn't shining.
Any thoughts on if/how it might be improved would be very welcome!
And...am I even in the ballpark?
Last edited: