Another micro-hydro...... [RE-wrenches]

[Jeff Clearwater]

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Hi John,

You say 150 kPa - that translates to 21.8 PSI or about 50.2' of head. 
Not exactly low head - or did I do that calc wrong?  Or did you mean 
15kPa?  What's the flow?  What's the present power level?

If it is 50' of head you might consider going to a Turgo or Pelton 
wheel and you should contact either Canyon Industries or HiPower at 
http://hipowerhydro.com/index.htm.

If you meant 5' of head then contact Ron Macleod for a Scroll Francis 
Turbine.at http://www.waterturbine.com/index.html  Francis' will work 
up to 50' of head too but will be more expensive than a pelton.

Canyon can also probably rework the old Mitchell.  If you have a 
cross-flow you probably have less than 50' of head.  Pray tell.

Best,

Jeff C.
Village Power Design


>
>Hi all,
>
>While on the subject of micro-hydro units, a client has an old 
>Mitchell cross-flow that is getting worn out after about 10 years 
>use. It is low head, high flow - 150 Kpa (static) and 225mm pipe on 
>the intake, which is 9" pipe.
>
>Does anyone have any clever ideas for a different replacement unit 
>as opposed to the re-work that is involved bringing the existing 
>unit up to spec.
>
>                                     thanks, 
>John Veix, Christchurch, N.Z.
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-- 
~~~~~~~~~~~~~
Jeff Clearwater
Village Power Design Associates
Sustainable Energy & Water Solutions for Home & Village
http://www.villagepower.com
gosolar at villagepower.com

530-470-9166
877-SOLARVillage
877-765-2784
425 Nimrod St.
Nevada City, CA 95959
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`~

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