There are a number of commercial wind farm proposals for North and West Devon in line with the government’s Kyoto Summit agreement. These are being met with massive opposition. They destroy the look of the countryside, they are inefficient, nimby-ism, and the huge grants available to energy companies who erect them is only there to make the government look as if it’s taken the energy crisis and climate change on board. Which, according to some, they haven’t, as they have their fingers stuck firmly in some other mucky puddle.
One argument that opponents to wind farms use is that because they can only generate power when the wind blows, every time a new wind farm is built a new coal, oil or gas station has to be built as well. I’m not sure I understand this. I get the point that wind farms will only ever produce energy intermittently, so they have to be used alongside other forms of power generation. No one says they are the solution on their own, just part of it. I just don’t see why new non-green power stations have to be built as well. Provided existing such stations are kept operational and ticking over, then when the wind drops they can be turned up. The argument that we need new conventional stations seems to me only to hold true if we need more energy overall – but with the increased imperative that now exists for energy conservation that should not be necessary. Indeed wind farms should surely mean that conventional power stations have to be used less (although as I say still kept operational), so helping to reduce climate change? Can anyone please help me here?



13 comments
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June 30, 2008 at 1:02 am
Tom Gray
Your perception is basically correct. Wind power is not a very efficient way to meet increasing electricity demand (which means increasing PEAK power demand), because it is variable. What it IS good at is (1) reducing greenhouse gas emissions and (2) reducing fuel use (that is, if electricity demand goes up, you still need more conventional power plants, but with more wind, they will run a lot less).
Does that help?
Regards,
Thomas O. Gray
American Wind Energy Association
http://www.powerofwind.org
http://www.awea.org
http://www.20percentwind.org
June 30, 2008 at 5:59 pm
eyegillian
I’ve been wondering about wind farms as well, as we pass by a fairly small one from time to time, and we’ve only seen the propellers (?) turning a couple of times. Still, it looks efficient, because while the tall towers have a bit of a footprint (and I’ve read about some environmental fallout), it allows farmland to produce crops/forage at perhaps a slightly reduced rate so that the airspace above the land can be used to produce energy. But I guess the power needs to go somewhere, so there needs to be energy storage close by otherwise the power would just leak away. But I hadn’t thought about wind power meaning more conventional power plants to make up the gaps… there’s got to be a better solution than that!
Still, I think the more seriously people take the power crunch (and the gas dollar), the more funding and research will be put into alternative solutions. For example, check out this cool idea for a floating (in air, not water) wind turbine which I saw in an “in flight” magazine recently, featuring a design by Canadian company Magenn: http://www.magenn.com/.
June 30, 2008 at 9:34 pm
paula
Thanks Tom. A couple of more questions you might be able to help me on. Shouldn’t we be decreasing, not increasing, our electricity demand? In this scenario is wind power a positive step in the right direction or does the manufacture and construction of the turbine negate any of the positive effects?
In the UK apparently subsidies from government and the consumer for each turbine is huge - we’re talking £1/4 million per quarter per year for twenty years. Therefore it’s mooted that energy companies are building wind farms for the huge profits it brings the company and not because it’s a good source of alternative green energy. Any thoughts?
June 30, 2008 at 9:56 pm
paula
Good to see you back eyegillian!
It’s a really interesting debate but difficult to get any balanced information and perspective. I would have thought that those green efficient countries such as Germany and Scandinavia, who use a lot of wind energy, would only do so if it was worth while.
Maybe constructing a community turbine where all the people in that community would benefit from their own electricity and pick up a subsidy would be a good way forward - but I think storage might be the problem.
That floating turbine is different!
July 1, 2008 at 8:29 pm
Mopsa
I know nothing about this subject, but gut instinct says surely we should harness natural power sources where we can - it is infinite, clean, and surely they can be positioned carefully. I drive past the ones near Davidstow quite often and those don’t detract from any amazing site of natural beauty - it’s just a portion of flat land inhabited by nothing other than heather and kestrels as far as I can tell, and neither of those suffer from nimbyism.
July 2, 2008 at 9:21 pm
paula
I’m all for your gut feelings mopsa!
July 5, 2008 at 2:18 pm
Lizzy
I looked into a turbine for our land recently but we don’t have enough wind here to make it viable. It has to be positioned without any mountains, hills, trees or buildings in any direction. Plus, even if you can find such a place in our immediate postcode, the average wind speed for the area is too low.
Turbines certainly need to be big to produce anything more than just a token amount of electricity and they are currently (I think) non-viable for households. For the £35K+ it would cost to place one of the correct size to generate all our electricity needs, I could leave all our electrical appliances and lights on for the rest of my life, and it wouldn’t cost as much.
Evangelists have said, well that is not the point. Saving the earth is the point. There is some debate regarding turbines and birds.
We’ve looking at an alternative method of lowering our bills, heating the house and generating electricity that doesn’t involve wind.
July 5, 2008 at 5:44 pm
paula
Thanks for all this useful info Lizzy. And yes, when you start to delve into these things there’are many different considerations - cost especially. Olly is quite keen to build one himself to keep the cost minimal - though buying all the components isn’t exactly a free dinner!
All the available methods need a lot of looking into and research - nothing presently looks perfect; though I’m sure it will come.
July 13, 2008 at 3:27 am
alison
While I haven’t looked into the whole wind farm issue, I have been keeping my eyes on a new small wind generator which is in the testing stages here in Portland Oregon. It is a vertical axis turbine, rather than the “giant propeller blades type” and is designed to be visible to birds, as well as being suitable for urban use. Not yet available, but will hopefully be in the next year or so…
http://www.oregonwind.com/
(I’m an artist friend of Heidi’s and trying to make a little sustainable backyard food zone here in the city, with veggies and fruit and hens…)
July 13, 2008 at 3:29 am
alison
I’m not sure how I got a smileyface on my post…
July 13, 2008 at 9:20 pm
paula
I have no idea how to do the smiley face thing either alison!
Thanks so much for visiting and giving a very interesting link to that wind turbine. I think it’s a case of the more you know the less you know…well it is for me.
Fantastic - your food zone - I hope it becomes a more and more popular thing to do. And good to meet a friend of Heidi’s too. You are a talented lot over there!
August 21, 2008 at 10:46 am
Dustin
You might have a look at http://www.withouthotair.com, which has a lot of interesting information on renewables - I recommend having a look at the presentations on the right-hand side. There is a lot of detail, but I’m reliably informed by colleagues that the author’s figures are credible.
On the subsidy issue - ROCs and all that - I’ve found it difficult to get balanced information, but it’s worth pointing out that both OFGEM and the Carbon Trust have been critical of the existing Renewables Obligation.
August 22, 2008 at 3:46 pm
paula
Thanks for this Dustin - all interesting stuff. I haven’t as yet had time to look at your link properly but will do as soon as I have a chance.
It is difficult to get balanced info on many of the above issues. If you find any more do let me know.