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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