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Re: GERMANY SUBSTITUTES WIND FOR NUCLEAR POWER
Hi,
I would like to draw your attention to the mistake on the calculation of
area per windmill at your message.
The mesh will look like as shown on the simple figure below,
| |
|
| |
|
-------X------------------------X------------------X------
| |
|
| |
|
| 0.125 km^2 | |
| |
|
-------X------------------------X------------------X-------
| |
|
| |
|
If you look at the calculated area 0.125 km^2, this will cover 4 windmills
per sub mesh. So the area per windmill sould be corrected as 0.125/4=0.03125
km^2.
----- Original Message -----
From: "Franta, Jaroslav" <frantaj@AECL.CA>
To: "Radsafe (E-mail)" <radsafe@list.vanderbilt.edu>
Sent: Tuesday, June 12, 2001 8:34 PM
Subject: RE: GERMANY SUBSTITUTES WIND FOR NUCLEAR POWER
> I hope everyone noticed the contradiction between the two statements,
>
> " Trittin told journalists in Berlin that the wind power plan could see
> between 75 and 80 terrawatt hours of electricity annually from
> offshore wind parks by 2030. This is equivalent to nearly 60 percent
> of the nuclear electricity produced last year in Germany. "
>
> and
>
> " Trittin said that two areas of the North Sea have been identified as
> appropriate for the construction of wind turbines which could total
> 4,000 by 2030. He said that the areas avoid all marine and bird
> conservation areas. "
>
> ....because 75 to 80 terawatt hours of electricity annually comes to a
> steady supply of about 8,790 MWe, which for the typical 25% average
capacity
> factor of windmills leads to a total installed capacity of some 35,160
giant
> windmills, each with 1MWe theoretical capacity -- or about 8.8 times as
many
> as Trittin claims in the second statement (windmills as large as 1.5 - 2
MWe
> have been built, but the 1MWe ones - and smaller - are much more common
and
> even the former wouldn't make up the factor-of-8.8 difference....).
>
> Furthermore, if these windmills have 50-metre-diameter blades, and they
are
> spaced at 10 blade diameters by 5 blade diameters, it takes 0.125 square
> kilometres per windmill, or 4,395 square kilometres total -- and since
> Germany's North Sea and Baltic Sea coasts are only a few hundred
kilometres
> long, the rows of proposed windmills will be about 10 kilometres deep --
in
> other words, the Germans can KISS THEIR COAST LINE GOOD-BYE ! ....any
bets
> on whether this will actually ever happen ?
>
> .....but its encouraging that at least some folks over there are not
blinded
> enough to recognise that there are environmental impacts of such "green"
> energy :
>
> " Offshore wind power is contentious among Germany environmentalists
> who are deeply divided about its environmental impact. The ministry
> does not expect its plan to get an easy ride so it has invited
> ecologists to a two-day congress this week to debate the
> "integration of climate protection, nature protection, marine
> protection and energy policy fit for the future."
> <SNIP>
>
> Jaro
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