[RE-wrenches] Micro Hydro control

[Carl Emerson]

Jay,

 

Can't find Derik. - www.highpowerhydro.com <http://www.highpowerhydro.com/>
is inactive.

 

Can you advise contact details?

 

Thanks.

 

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: 2 October 2008 10:06 a.m.
To: RE-wrenches
Subject: Re: [RE-wrenches] Micro Hydro control

 

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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