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

[Gary Higbee]

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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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