The most frequently unknown aspects of industrial wind power, according to the shared experiences of people trying to educate their neighbors, are the enormous size of the turbines, the new or upgraded roads required, the irrelevance of oil to electricity generation, and the virtually nonexistent effect of wind power on emissions from other sources, such as coal. These have been compiled into a FAQ page at www.aweo.org/faq.html.
categories: wind power, wind energy, wind farms, wind turbines, environment, environmentalism, Vermont
November 3, 2005
High cost, low benefit
Here's a picture of what appears to have been once a lovely open vista in Hungary.
categories: wind power, wind energy, wind farms, wind turbines
categories: wind power, wind energy, wind farms, wind turbines
The gearbox: wind power's Achilles' heel
This month's Windpower Monthly examines a little-known twist in the "mature technology" of large-scale wind turbines:
Gearboxes have been failing in wind turbines since the early 1990s. Barely a turbine make has escaped. Six years ago the problem reached epidemic proportions, culminating in a massive series failure of gearboxes in NEG Micon machines. At the time, the NEG Micon brand was the most sold wind turbine in the world. The disaster brought the company to its knees as it struggled to retrofit well over one thousand machines. It has since been taken over by Vestas, the world's largest wind turbine manufacturer. Vestas is still grappling with the aftermath of the gearbox catastrophe.
The wind power industry and its component suppliers now believe that such major series failure of gearboxes is a thing of the past. Today's far larger and more sophisticated turbines, they say, are safe from mistakes encountered in early phases of technology development.
Bigger turbines, however, are proving to be far from immune to gearbox failure, as Windpower Monthly reports in its November issue. ...
The wind industry's gearbox problem has for years been shrouded in secrecy. While blame for the failures has been spread far and wide, questions outnumber the answers by far. At Windpower Monthly we set ourselves the task of finding out the true scale of the problem. Why is it that gearboxes in wind turbines have so massively failed? What is the solution? ...
The good news is that understanding of the highly complex loads that gearboxes -- and particularly their bearings -- are subject to is being helped by a new industry willingness to co-operate and face up to the challenges of wind power's rapid technological evolution. But only time will tell whether a definitive solution has been found -- and whether it will stay the course as wind turbines get ever bigger and more demanding of engineering ingenuity.
categories: wind power, wind energy, wind turbines
November 2, 2005
Punishment
Here's a picture from the October 9 Watertown (N.Y.) Daily Times, of some of the approximately 150 turbines in Phase I of the Maple Ridge Wind Farm on Tug Hill in northern New York. A complete concrete plant was built just to provide for the massive foundations.
categories: wind power, wind energy, wind farms, wind turbines
categories: wind power, wind energy, wind farms, wind turbines
Wind barely better than nuclear
George Monbiot wrote in the October 25 Guardian (U.K.):
Note: I pointed this out, that wind was hardly better than nuclear, to Mr Monbiot, who has written an incisive critique of the "wind power madness" yet still supports it. His reply was, "20-70% hardly better? Try telling that to an economist." One hopes that some economists are better at math than this. The comparison in this analysis is to what ten cents could buy if best spent, namely, 10 KWh of energy efficiency, so that wind is only a 2-7% better investment for reducing CO2 emissions than nuclear.
categories: wind power, wind energy, environment, environmentalism
Ten cents of investment, [Amory Lovins of the Rocky Mountain Institute] shows, will buy either 1 kilowatt-hour of nuclear electricity; 1.2-1.7 of windpower; 2.2-6.5 of small-scale cogeneration; or up to 10 of energy efficiency. "Its higher cost than competitors, per unit of net CO2 displaced, means that every dollar invested in nuclear expansion will worsen climate change by buying less solution per dollar." And, because nuclear power stations take so long to build, it would be spent later. "Expanding nuclear power would both reduce and retard the desired decrease in CO2 emissions."It is notable that wind power is almost as bad an investment as nuclear power for reducing CO2 emissions.
Note: I pointed this out, that wind was hardly better than nuclear, to Mr Monbiot, who has written an incisive critique of the "wind power madness" yet still supports it. His reply was, "20-70% hardly better? Try telling that to an economist." One hopes that some economists are better at math than this. The comparison in this analysis is to what ten cents could buy if best spent, namely, 10 KWh of energy efficiency, so that wind is only a 2-7% better investment for reducing CO2 emissions than nuclear.
categories: wind power, wind energy, environment, environmentalism
October 30, 2005
The Low Benefit of Industrial Wind
Driving the desire for industrial wind power is the conviction that its development is necessary to reduce the effects of fossil and/or nuclear fuel use. Thus the local impacts of large wind turbine installations are justified by a greater good of healthier air and water, reduction of global warming, and moving away from harmful mining and fuel wars. These are all without question important goals.
While the wind power industry tends to downplay its negative effects, many conservation groups call for careful siting and ongoing study to minimize them. There is debate, therefore, about the actual impacts, but there is none about the actual benefits. Even the most cautious of advocates do not doubt, for example, that "every kilowatt-hour generated by wind is a kilowatt-hour not generated by a dirty fuel."
That may be true for a small home turbine with substantial battery storage, but such a formula is, at best, overly simplistic for large turbines meant to supply the grid. The evidence from countries that already have a large proportion of wind power suggests that it has no effect on the use of other sources. This is not surprising when one learns how the grid works: A rise in wind power simply causes a thermal plant to switch from generation to standby, in which mode it continues to burn fuel.
Read the rest of the paper at: www.aweo.org/LowBenefit.pdf.
categories: wind power, wind energy, wind farms, wind turbines, environment, environmentalism
While the wind power industry tends to downplay its negative effects, many conservation groups call for careful siting and ongoing study to minimize them. There is debate, therefore, about the actual impacts, but there is none about the actual benefits. Even the most cautious of advocates do not doubt, for example, that "every kilowatt-hour generated by wind is a kilowatt-hour not generated by a dirty fuel."
That may be true for a small home turbine with substantial battery storage, but such a formula is, at best, overly simplistic for large turbines meant to supply the grid. The evidence from countries that already have a large proportion of wind power suggests that it has no effect on the use of other sources. This is not surprising when one learns how the grid works: A rise in wind power simply causes a thermal plant to switch from generation to standby, in which mode it continues to burn fuel.
Read the rest of the paper at: www.aweo.org/LowBenefit.pdf.
categories: wind power, wind energy, wind farms, wind turbines, environment, environmentalism
October 23, 2005
Lying about bat kills
From the Winona (Minn.) Daily News, Oct. 23:
categories: wind power, wind energy, wind turbines, environment, environmentalism
During a tour last month of Carleton College's 1.65 megawatt turbine in Northfield, Minn., project director Rob Lampa told a group of about 30 Winona County residents that the college had found no evidence of bird or bat kills in the first year of operating the 230-foot turbine [plus 135-foot blade radius], situated in a cornfield about 1 1/2 miles east of town.Lampa will have to make sure the clean-up crew does a better job before he gives the next tour!
As the group was leaving, Winona resident Marijo Reinhard pulled County Commissioner Dwayne Voegeli aside.
"Look," she said, pointing at the ground, where she had spotted a small, brown bat dead on the gravel below the slowly spinning turbine. A few feet away, she spotted another, also dead.
categories: wind power, wind energy, wind turbines, environment, environmentalism
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