[RE-wrenches] Micro Hydro control

[jay peltz]

HI Carl,

I recommend you contact Derik at highpowerhydro.com

He has done many of these systems.

The main issues are pressure, number of nozzles, type/manufacturer of  
turbine and voltage to determine the voltage of the valve.

Good luck,

jay

peltz power
On Oct 1, 2008, at 1:04 PM, Carl Emerson wrote:

> Hi There,
>
> Thanks for the helpful comments.
>
> Hydro is 400V 3 phase AC.
>
> I have a 1500 foot underground feed back to the house
>
> I would like to hear if anyone has done this and what were the  
> issues to watch for.
>
> Here in NZ streams change level very fast summer or winter.
>
> I am planning to rectify to DC and then use three windyboy1700’s one  
> on each local 230V phase.
>
> I will hunt down the hydro group also for further information.
>
> Many Thanks all
>
> Carl E.
>
> From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org 
> ] On Behalf Of jay peltz
> Sent: 1 October 2008 4:07 a.m.
> To: RE-wrenches
> Subject: Re: [RE-wrenches] Micro Hydro control
>
> Hi Carl,
>
> Yes there are some options.
>
> If you use a good pressure activated switch, you can turn on/off  
> slow opening electric valves as flow changes.
>
> IE so as the flow drops, the pressure drops and at the activation  
> point, the relay closes one or more valves allowing the pressure to  
> build up at which point the valve will open again.
>
> For finer regulation you might need more than one valve to have a  
> relay and more than one pressure switch.
>
> Its can be pretty expensive, but it does work.
>
> What voltage is the turbine?  This helps to know if you can use the  
> turbine power to control the valves.
>
> thanks,
>
> jay
>
> peltz power
>
>
> On Sep 29, 2008, at 9:36 PM, Carl Emerson wrote:
>
>
> 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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