HI I should not speak, but, I thought the nozzel had to be sized to the flow to attain efficiency. So if you have a 4 kW it can not be throtted except by changing nozzle size or stopping the flow in some nozzles, does this mean you could use solinoid valves? Also a MPPT controller for Hydro would be better? See I dont know about this. Darryl
--- On Mon, 9/29/08, Carl Emerson <[EMAIL PROTECTED]> wrote: > From: Carl Emerson <[EMAIL PROTECTED]> > Subject: [RE-wrenches] Micro Hydro control > To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org> > Date: Monday, September 29, 2008, 11:36 PM > Hi there gang, > > > > We are looking at a 4kW PM hydro for a client and was > wondering if anyone > has done an automated control of flow into such a unit so > as to limit the > amount of water being taken from the stream in the Summer. > > This is usually done manually by closing down nozzles on > the unit but here > in NZ weather changes fast and the unit is 500M from the > house. Summer rains > can be significant and sudden. > > We are planning a 6inch pipe with around 100 ft of fall, > the stream when low > will allow a flow of 20Litres/sec but when high will > deliver twice that > amount. > > Any suggestions?? > > > > Thanks > > > > Carl Emerson > > Freepower Ltd. > > Auckland NZ > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
