Re: UK Wind Turbine Expansion

On Sun, 09 Dec 2007 19:20:08 +0000, Dirk Bruere at NeoPax
<dirk.bruere@xxxxxxxxx> wrote:

abelard wrote:
On Sun, 09 Dec 2007 18:57:49 +0000, Dirk Bruere at NeoPax
<dirk.bruere@xxxxxxxxx> wrote:

abelard wrote:
On Sun, 09 Dec 2007 18:37:23 +0000, Dirk Bruere at NeoPax
<dirk.bruere@xxxxxxxxx> wrote:

abelard wrote:
On Sun, 09 Dec 2007 19:04:32 +0100, abelard <abelard3@xxxxxxxxxxx>
wrote:

On Sun, 09 Dec 2007 18:56:48 +0100, abelard <abelard3@xxxxxxxxxxx>
wrote:

On Sun, 09 Dec 2007 17:48:05 +0000, Dirk Bruere at NeoPax
<dirk.bruere@xxxxxxxxx> wrote:

abelard wrote:
On Sun, 09 Dec 2007 15:52:05 +0000, Dirk Bruere at NeoPax
<dirk.bruere@xxxxxxxxx> wrote:

http://news.bbc.co.uk/1/hi/uk_politics/7135299.stm
"There could be more than two offshore wind turbines per mile of UK
coastline under plans being set out by ministers.

Business Secretary John Hutton says he wants to open up British seas to
allow enough new turbines - up to 7,000 - to power all UK homes by the
year 2020. "
how on earth do they claim it will 'power all uk homes'
the claim is utter bollox
Not at all.
What's the percentage of power used by home owners? Assuming 20 million
households each generously averaging 0.5kW that equates to an installed
capacity
between 1 and 2 kw is usual modern estimate

of 10GW ie the equivalent of 10 power stations.
the uk has over 60 'big power stations'....
this is both over-engineered and allows for down times and
peak demand

Or, working
backwards, each turbine would have a generating capacity of around 1.5MW
as another poster says...wind is (generously) assessed at
1/3 of the time active....
ie you'd need 3x the generating capacity to equate to online
facilities like coal and nuclear....
present experience is wind will take up in the 5-10% region

it cannot be switched in when required....
ps, you may be confusing electricity received at the household with
real electricity used which includes that embodied in manufactures
(including housing and much more) attributable to the household
pps
.68kw per *person* usage in the uk

i have a table here
http://www.abelard.org/briefings/replacing_fossil_fuels.htm#fuel_usage_efficiency
rf to last column in table
I was addressing your point when you complained about the use of the
term "every home in Britain". As projected, wind power will provide the
equivalent electricity need of every home in Britain. It does not
address manufacturing and transport.
the claim remains:-
"to power all UK homes by the year 2020. "

a totally ridiculous claim....

you are now altering it to
1)consumed in the home
2)electricity only
3)and 'the equivalent'

even then problems remain:

like how usable in view of unpredictability....
no use having the electricity generated when you can't
use it....
and the fact that you need at least three times the generating
capacity to match on line/demand generators

you might add electricity in the home is rising steadily
At 20% of total electricity generation power balancing will not be much
of a problem. Also, electricity generated can *always* be used.

a very different argument....
though i don't think the most advanced countries
(denmark and germany) are managing even 20%

another factor you may not realise is the base load generators cannot
just be stopped and restarted at will...

Hence gas turbines and Dinorvic

there are very dinorvic sites available and the scheme was
very expensive
as for gas turbines i'm too ignorant of the technology
to comment

regards...

--
web site at www.abelard.org - news comment service, logic, economics
energy, education, politics, etc 1,552,396 document calls in year past
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