Birding Aus is probably not the place to start a Windfarms and Peak Oil
debate. This is well served by many sites (see
http://mc2.vicnet.net.au/cmt/links/index.html for a lage number of links - I
add more as I find them).
What, is very clear, however, is that the 6.5 billion people on this planet
are using fossil fuel energy at hundreds of times the rate at which it is
being laid down. Very shortly this will have to stop (like the Walrus and
the Carpenter, we will have "eaten every one"). Energy consumption will
have to be cut back sharply, as will absolute population. When the remaining
one billion people (plus or minus 500, million) use only the energy they can
get from real renewable resources, we will have to accept that power will
fail when the wind doesn't blow or the sun shine.
The transition to this state is inevitable. The form of the transition
(peaceful or violent), and the damage we do while it is happening, may still
be an open question. I'm afraid that the survival of OB Parrots or the noise
pollution from Windfarms, will become a very minor matter.
Tim Murphy
-----Original Message-----
From:
Behalf Of L&L Knight
Sent: Tuesday, 11 April 2006 4:34 PM
To: Birding Aus
Subject: windfarms
Yes, that's why we have to become more efficient with our energy use,
so we can bring demand down to a level that can be met by renewable
sources. The less resources we use, the fewer birds get displaced
and killed.
Regards, Laurie.
On Tuesday, April 11, 2006, at 02:54 PM, MetaSense Pty Ltd wrote:
> After reading the posts of windfarms I was interested in relative
> sizes of windfarms vs the Latrobe valley power stations (for example),
> although I have never been there so I can't make judgements.
>
> The capacity of the 4 major LaTrobe powerstations is about 6000
> Megawatts and presumably is able to supply most of this capacity more
> or less continuously.
>
> The windfarm which I know, the Albany windfarm, has windmills with a
> capacity of about 2 MW. However this is only achievable in
> sufficiently strong winds so the average generating capacity is very
> much less.
>
> The towers are about 65 metres high and the rotors which are affixed
> to the top of the towers are about 50 metres in diameter. Since each
> windmill interferes with the airflow they need to be spaced
> sufficiently far apart to minimize this effect. As a result the
> maximum density is apparently around 4 to 5 per square kilometre. ie.
> one would need about 6000 windmills spread over about 1000 square
> kilometres to equal the capacity of the LaTrobe valley power stations.
>
> Within this area the maximum distance you would be from a windmill
> would be about 200 - 300 metres.
>
> Of course one could have many, smaller concentrations spread over the
> landscape.
>
> Cheers
>
> Andrew
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> birding-aus.blogspot.com
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>
Laurie & Leanne Knight
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