Four-nozzle Stream Engine at low head? [RE-wrenches]

[David Katz]

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Hi Gary,
With four 7/8" nozzles you could run 250 GPM through the ES&D turbine 
and get about 450 watts. That great of a flow might flood the wheel and 
reduce efficiency a bit. Do you need this much power. You would be 
getting over 10 kwh per day. Even with two turbines, the price is pretty 
low compared to using PV modules. I would be inclined to try a four 
nozzle machine if you can live on less than 10 kwh per day.
David

David Katz
President, AEE Solar
formerly Alternative Energy Engineering
1155 Redway Drive - Box 339
Redway, CA 95560 USA
(707) 825-1200
(707) 825-1202
email: david at aeesolar.com
web: www.aeesolar.com


Gary Higbee wrote:

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> Wrenches,
>
> I'm working a hydro site that has about 20' of head, and an available 
> flow of up to about 250 gallons per minute (we're likely using 6" 
> pipe). A four-nozzle Stream Engine would seem to be a good choice, but 
> ES&D suggests using a pair of two-nozzle units for the highest 
> efficiency. Sounds good, but that's a heck of a lot of money. I used a 
> four-nozzle on a lowish head system some years ago, but unfortunately 
> don't remember the numbers.
>
> Do any of you have first-hand knowledge that would suggest we'd be OK 
> in the 200-250 gpm range with a four-nozzle unit at 20' of head? Any 
> numbers?
>
> While we're on this have you found that the published power numbers 
> for the Stream Engine agree with your installed readings?
>
> Thanks!
>
> Gary
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~ Windstream Solar ~
> Gary Higbee (gary at windstreamsolar.com)
> (541 ) 607-1818 (Eugene)
> (541) 954-3881 (Cell)
> Solar, wind, and hydro site analysis and system design
> Components dealer and installation management
> Energy Trust of Oregon contracted system inspector
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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