[RE-wrenches] Micro Hydro control
Darryl Thayer
daryl_solar at yahoo.com
Tue Sep 30 07:35:07 PDT 2008
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 <freepower at freepower.co.nz> wrote:
> From: Carl Emerson <freepower at freepower.co.nz>
> Subject: [RE-wrenches] Micro Hydro control
> To: "'RE-wrenches'" <re-wrenches at 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
>
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