Today I argued lots about wind farms. I'm very pro-environment, and quite pro-renewable energy, but really really don't think they're a good idea. A bit of it is Nimbyist, but a lot of it is that it's a huge amount of asthetic and environmental* misery for a rather pathetic power output.
Also, I have genuine supervisees next term! :-) Bit nervous about it really. Ah well, I can always ask my clever friends for help.
*as in digging up trees and killing little birdies
Ok, this was a bit hashed out of google, and is obviously a bit of a meaningless statistic, but I'm convinced it's true to order of magnitude.
If all the UK's power was generated by new top of the range windfarms, spaced equally across the country, there would need to be 23 in Cambridge.
Obviously as there are only certain sensible places to put them, what this really means is that all our national parks will become forests of wind turbines. But Kings parade will probably be safe... (Or they'll be effectively trivial, providing only a tiny fraction of our necessary power... they're just the governments sop to the environmentalists so they don't have to fix anything.)
I actually like the look of wind farms. But maybe I'm just strange.
What about the off-shore one?
I can see you being a really good supervisor. Hope it goes well.
I also quite like the look of windfarms, though I can see they probably have drawbacks.
|Date:||September 23rd, 2004 02:23 pm (UTC)|| |
The trees and birdies are going to die anyway if the climate goes to hell, and we can always recycle the windfarms later if we come up with a better idea. On that basis I'd pick wind over nuclear...
|Date:||September 23rd, 2004 03:15 pm (UTC)|| |
I keep worrying away at the annoying fact that the efficiency of wind-powered generators is so hideously dependent on size; I have a vision of rows of little fans along the ridge-top of house roofs, but sadly ...
On the other hand, googling has found this
which is excellent (in a slightly deranged way).
Another bit of googling dredged up the defence that "domestic wind turbines are no more noisy than a domestic washing machine", which seems to me to be damning with faint praise, to say the least.
If all the UK's power was generated by new top of the range windfarms
No-one is suggesting that all power should come from wind! With renewables there is always going to be a mix. We also want to be reducing power consumption.
Sticking photovoltaic cells on rooves strikes my as a good place to start!
|Date:||September 23rd, 2004 03:33 pm (UTC)|| |
As I understand it the problem with photovoltaic cells is that they just aren't cost effective enough (like pretty much all environmentally friendly power unfortunately)... they need to be either much cheaper or much more efficient.
|Date:||September 23rd, 2004 03:30 pm (UTC)|| |
I should point out here that nobody in their right mind is suggesting that we use wind power to produce all of our electricity. However, the fact that we shouldn't be completely dependent on them doesn't necessarily mean they're a bad idea. The windfarms that I've seen in Ireland (all on barren stretches of the coastline) produce about 3% of our energy requirement. If a wide portfolio of renewable sources are used, then the individual impact to each area of the environment is minimised.
|Date:||September 23rd, 2004 04:30 pm (UTC)|| |
England doesn't have any barren stretches of coastline of any significant length. (Scotland does, but then there's a prohibitive cost of transportation of materials and labour to actually build the things, and then to lay power lines afterwards...)
|Date:||September 23rd, 2004 03:31 pm (UTC)|| |
I thought they wanted to put them all out to sea?
What are your thoughts on nuclear? It seems to have found unexpected friends in the environmental movement recently (or so the media would have me believe).
Nuclear is baaaaaad. Too potentially dangerous for my taste and the waste is a major problem.
I also quite like the look of windfarms, and the sound too: they make me think of ships' masts. Therefore I am horribly torn whenever I read about mangled red kites. On the other hand, the only mangled red kite I have actually *seen* was on the verge of the M40, but no-one is planning to ban cars.
|Date:||September 24th, 2004 03:20 am (UTC)|| |
are kites unable to spot spinning blades or something?
Ditto Pellegrina, I actually find the one on the edge of the Lake District aesthetically pleasing. I do think though that generally the big ones need to be in windy places, and away from homes in case things fall off, but small ones could go on rooves. Why not, with trying to save our human friendly ecosystem every little helps.
Which brings in the question, is it worth having hydro turbines in town fresh water systems (which is pressured by pumps) to add a few Mw (or fractions thereof) per house to the grid?
|Date:||September 23rd, 2004 04:09 pm (UTC)|| |
I have a (unsubstantiated) feeling that their efficiency increases with their size, so building lots of small ones (say for the top of housing) would be very expensive, generate little electricity, and have a poor short-medium term environmental impact (as there is an environmental impact in creating them).
Such a pity most of the environmental lobby is terrified of nuclear power...
|Date:||September 24th, 2004 04:44 am (UTC)|| |
Can you blame them? Possibility of accident at the power station aside (a risk which I think has been reduced to acceptable proportions), it creates a dangerous waste material which we don't know how to deal with. CO2 we can make go away (or at least plants can), radioactive waste you're stuck with.
Secondly no one (as far as I'm aware) has figured out how you decomission a nuclear powerstation. That's an important question I feel really should be answered before we build more of them.
|Date:||September 23rd, 2004 04:53 pm (UTC)|| |
An excellent study on this is the RCEP report Energy - The Changing Climate
. I have a bound paper copy if you feel like reading the whole thing, otherwise their four illustrative scenarios outlined in Chapter 9 are very interesting.
All four scenarios are looking at 2050, and assume a 60% reduction in CO2
emissions from 1997 levels. Only one assumes no reduction in energy consumption, that one requires nuclear power equivalent to 46 Sizewell B stations in addition to renewable resources. The others all assume a significant reduction in energy consumption.
Onshore wind power is only the fourth largest renewable energy contributor in these scenarios after fuel crop and waste burning, offshore wind and wave power, and photovoltaic cells. It's still an important factor however.
|Date:||September 24th, 2004 01:29 am (UTC)|| |
Interesting link - I'll have to read it at lunch time.
|Date:||September 24th, 2004 01:25 am (UTC)|| |
King's parade will probably be safe
You mean we can't mount a bunch of turbines on top of King's chapel?
|Date:||September 24th, 2004 03:22 am (UTC)|| |
Re: King's parade will probably be safe
Now that would be a classy student prank - one turbine on each corner, powering a flashy-sign thingy saying "use more environmentally sound power sources". Oh, more likely "We ownz0r y00!", alas.
|Date:||September 24th, 2004 04:48 am (UTC)|| |
they're just the governments sop to the environmentalists so they don't have to fix anything
I accuse the above sentence of bitter, but unjustified and profoundly unhelpful cynicism (so Neil, when was the last time cynicism was helpful?).
It's been a few years since I look at such things, but when I did most wind turbine farms seemed to be of the "okay, let's get this concept out into the real world and see if it works, which designs are good, where they work" etc. If we never test the ideas, we're never going to make them really work.
I'm all for potential renewable engery sources being given a proper trial to understand how we can refine them, and what they can really do. If we keep working away at them, we have a good chance of improving their efficiency, if we do nothing with them we have an excellent chance of never improving their efficency.
Finally I would observe that right now wind turbines have a certain novelty value. I think people would find their asthetic appeal drastically reduced if they were everywhere.
|Date:||September 27th, 2004 10:41 am (UTC)|| |
23 sounds a really small number to me. Is that just central Cambridge, or out as far as Girton? I reckon 23 would be quite fine, as an alternative to, say, ceasing to use electricity. Which nobody seems to be planning to do any time soon, and they seem to complain about forking out truly enormous sums for (rapidly-improving) photovoltaic.
Wind turbines don't produce electricity in amounts of the same order as fossil fuel or nuclear power stations, but that's kind of the point of distributed generation- you don't get concentrated renewable sources, apart from rivers, and hydroelectric dams are *really* bad for the local ecosystems.
In practise, as lots of people have said, it's going to have to be a combined solution- onshore wind, offshore wind, solar, biomass, bits and pieces of other things, and really importantly increased efficiency. I'm not sure we can afford to neglect any possible renewable source, especially one which is financially viable *now* as opposed to in five years and after a lot more carbon dioxide has been emitted.
I'm rather fond of birds myself, though I have to say I think climate change could do away with birds more effectively than any number of windfarms. I read a study at work that said that you can at least minimise the impact of them on the bird population, particularly by making them higher than most birds fly and siting them off main migration routes, and also by keeping the bases of the towers free of vegetation and hiding places so that small animals don't hide there and attract raptors right up to the towers. There is quite a lot of space between turbines for bushes and undergrowth, and the towers are pretty low-maintenance, so there is no reason why you can't have a normal ecosystem around the bases.
As for them being a sop to environmentalists, sadly nearly everything that is being done at the moment is a sop, and we have to be glad of what we get. At least subsidising current turbine projects means more R&D money for renewables, and produces evidence that you can actually generate power without fossil fuels, which increases investor confidence in the renewables sector in general.