Re: Re: Wind Turbines and Heating Water

[Peter + Jane <pandj.munnoch@xxxxxxxxxxxxxx>]

Hi Patrick
Not wishing to be negative but the viability of=20
small wind turbines is often questioned.
See
<http://www.timesonline.co.uk/tol/news/environment/article6994439.ece>http:=
//www.timesonline.co.uk/tol/news/environment/article6994439.ece=20

On UK Selfbuild, Mark Brinkley is recognised as a source of info
See
http://markbrinkley.blogspot.com/search/label/Renewables
This is meant in the spirit of hth. Many=20
selfbuilders have decided against. Would hate you=20
to go to all that trouble and cost only to be disappointed.
Have you looked at Navitron.org forums?
Rgds
Peter
>
>
>
>
>--- In=20
><mailto:ukha_d%40yahoogroups.com>ukha_d@xxxxxxx,=20
>Graham Kiff <graham.kiff@...> wrote:
> >
> > Hi Patrick
> >
> > The original reason for splitting the battery=20
> banks was to be able to supply both 24v & 48v=20
> (I didn't realise 48v inverters were so readily=20
> available). The reason for the batteries is=20
> purely voltage regulation rather than storage=20
> of power. I therefore think I can revert to just one bank of
batteries.
> >
> > The plan was to use all the power produced to=20
> heat my thermal store to ~70c, then once=20
> reached, dump the excess load via the inverted=20
> to the grid. I assume therefore I should use an=20
> inverter rated to the maximum output of the=20
> turbine (1.4Kw in this case) - correct?
> >
> > So my setup will basically be:
> > Turbine -> 4x12v batteries (in series) -> SEA24 440Amp
relay ->
> > Either48v DC Immersion Heater
> > Or48v Grid-Tie Inverter
> >
> >
> > Cost-wise I should be able buy everything for ~=A3900
> > How does this sound?
> >
> > Cheers
> > Graham
> >
>
>Ah, that all makes sense.
>If you think you may need to heat the tank from=20
>the utility supply at some point, you could fit=20
>a second 240V AC immersion heater rather than=20
>trying to use a 48V high current power supply.
>If you are using spring water or bore water,=20
>check with your neighbours regarding the use of=20
>copper heaters and tanks, as the impurities=20
>present can lead to pin hole corrosion and=20
>premature failure (if necessary, use stainless -=20
>hideously expensive I think?). (Or if you have=20
>an existing installation, you'll know whether this is the case
already.)
>Yes, rate the inverter to the maximum turbine=20
>output. I think you will still need a dump load=20
>to be able to safely disconnect the battery bank=20
>from the turbine and to deal with overcharging=20
>in the event there is no load (e.g. power cut in a gale?).
>Obviously the inverter will need to comply with=20
>local feed-in regs - there's a specific safety=20
>standard that is relevant that prevents the=20
>inverter reconnecting to the grid within 3=20
>minutes of reconnection of utility power to=20
>guard against frying of linesmen - the cheap=20
>chinese knockoffs don't generally have this certification.
>Cheers
>Patrick
>
>



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