"Onerous" demand that wind turbines actually work

The American Wind Energy Association sponsored a financing workshop in New York last week. As reported by Renewable Energy Access:

Another major theme of the workshop was the effect that high natural gas prices are having on the wind power market. In general, the high fossil-fuel prices will be very good for the wind power market, most agreed, as utilities and investors that want to limit their fuel-price risk start looking for other energy technologies that can be built quickly. However, that interest is making project development more difficult in some ways, as well. As utilities try to define power output from a wind project more and more precisely, they are tending to make power purchase agreement terms more onerous -- too limiting in some cases to make the project viable.

In light of that fact, investors and developers are starting to look toward merchant wind plants -- those built without a long-term supply contract. In some markets, especially those with high renewable energy credit prices and predominant use of natural gas for electricity, merchant plants look as though they may be more profitable than those with supply contracts locked in. However, with the exception of a few cases, there has been little action on the merchant plant front yet.

In other words, a wind facility is only attractive to investors if it is not actually expected to produce useful electricity!

categories:  wind power, wind energy, wind farms

"The Sheaves"

The Sheaves Where long the shadows of the wind had rolled, Green wheat was yielding to the change assigned; And as by some vast magic undivined The world was turning slowly into gold. Like nothing that was ever bought or sold It waited there, the body and the mind; And with a mighty meaning of a kind That tells the more the more it is not told. So in a land where all days are not fair, Fair days went on till on another day A thousand golden sheaves were lying there, Shining and still, but not for long to stay— As if a thousand girls with golden hair Might rise from where they slept and go away. —Edwin Arlington Robinson

"Noisy turbine annoys neighbours"

From the August 11, 2003, Christchurch (New Zealand) Press. According to a campaigner in the area, the problem has not yet been resolved.

Windflow Technology is shutting down its Gebbies Pass [500kW] wind turbine each night because of noise concerns. ...

The turbine looms over a ridgeline above photographer Julie Riley's McQueens Valley property.

Ms Riley, who objected unsuccessfully to the project at its resource consent hearing on the basis of noise and landscape values, said the turbine was much louder than expected.

Windflow was not able to stick to its resource consent, and people 3km from the wind turbine could hear it whenever it was running, she said.

"They said it would be quieter than 30 decibels and we would only be able to hear it 3 per cent of the time.

"They would have had a lot more people complaining at the resource consent hearing if people down the valley knew they were going to be affected.

"We are hearing it almost 100 per cent of the time when it is running," Ms Riley said.

Two noises were emanating from the site, just more than 1km from her house.

"Two hydraulic pumps run all the time. I can hear those at night," she said.

"When they have the blades going it is terrible. It sounds like 'grind, grind, grind'. It obliterates the bird sounds and all the nature sounds that we have all come here for."

categories:  wind power, wind energy, wind turbines

Wind turbines require high maintenance

It's not just the gearbox. You've got 40 tons of rotor blades turning and changing pitch, attached to a 70-ton nacelle which turns on top of a 250-foot-high tower to catch the wind. A mechanical challenge in any environment to be sure.

The following is from John Galambos, "Brooklyn wind turbine performance over 12 years," presented at New Zealand Wind Energy Association Conference, 31 August 2005. Remember that this single turbine near Wellington (N.Z.) is a demonstration installation, with all the money necessary thrown at it to keep it going. Since most of the financial benefits in the U.S. disappear after a few years (6 years for accelerated depreciation, 10 years for production tax credit), the more likely scenario for most facilities is abandonment, as with many of those in Altamont Pass, California, and the sad specimens at South Point, Hawaii.

TECHNICAL ISSUES DURING OPERATION
Years 1 and 2

Gearbox oil issues with build up of black gunge

• oil type changed

Part of skylight roof section vanished during 1994 storm

• 38.5 m/s 10-sec average
• Estimated 45m/s 3-sec gust, turbine rated for 70m/s 3-sec gust
• Anemometer cup vanished (years 5 and 11 also)

Slip coupling operating too frequently, required replacement

• High wind shutdown changed from 25 to 22 m/s

Blackening of gearbox oil

Years 3 and 4

Blade inspections revealed gel coat failures

• Appear to relate to damage from thrown stones

Tower to foundation ring flange-to-flange bolts started failing

• Managed by monitoring and change out

Numerous minor factory technical upgrades continued

• Driven by Service Bulletins not issues on site

Yaw drive issues, noisy

• motors and worm drive gears replaced

Years 5 to 9

Pitch accumulator leaking - replacement with production loss

Controller required Y2k modifications

Yaw drive gearboxes replaced

Ongoing issues relating to EMC

• Susceptible to strong local FM radio transmission

Gearbox low speed shaft stiffener fitted

• Factory modification for high winds
• Internal expansion sleeve to hollow shaft
• Too late, damage done, gearbox would require replacement before long.

About year 10

Gearbox high speed shaft bearing failed at 9+ years

• Noisy gearbox operation
• Before original gearbox was replaced

Weather mast guy hardware failed

• Repair can have safety implications

Gearbox replaced at 10 years

• Refurbished unit, "as new", with warranty
• Shaft end floats outside maintenance tolerances when delivered
• Bearing replaced after 3 months
• Gearbox replaced again after 13 months
• Condition monitoring trials unsuccessful

Years 11 and 12

Nose cone replaced

• Disintegrating

Tower section joining bolts corroded

• Replaced at 11 years

Pitch linkage connections failed,

• Rods damaged and replaced

Yaw ring and yaw gears failed

• Long outage
• No local parts

Other

• Numerous control card replacements/updates to Service bulletins
• Included fans to control cards, oil filtering etc
• Communications issues at times – not turbine related
• Distribution disturbances have tripped the turbine
• Some misc contactor failures, replacement repairs, consumables etc.

categories:  wind power, wind energy, wind farms, wind turbines

"Wind Powers American Dream"

Now-freelance journalist Judy Miller is already working again, using her special access abilities to report the real truth, i.e., the truth those in power need us to believe. Fresh from her work to promote the disastrous invasion of Iraq, she now turns to the domestic challenge of pushing unpopular industrial wind facilities onto communities across the country, as this excerpted story from tomorrow's Washington Argus shows.

Wind Powers American Dream

by Judith Miller

Washington, DC -- I have just spent two weeks embedded with the president of the American Wind Energy Association and cannot convey strongly enough the urgent need for massive wind power development in this country.

Randall Switscher took me with him to see site after site that was either totally lacking industrial development or mostly wasted with low-grade agriculture.

"These people desperately need our help," Randy told me. "We need to bring them into the 21st century, get some investment going there."

Randy's model is the transformation of Nigeria by the presence of foreign oil companies who built schools, hospitals, banks, and communication infrastructure. Nigeria now rivals Sweden in measures of equality and health, he says.

During a retreat in the lovely unspoiled mountains of Vermont, I met Keith Dewley, a college-educated architect. He told me how grateful he is to Mr. Switscher for providing a beacon of hope to Vermonters. It is now normal for a Vermont child to hope to go to college, and that is directly a result of the activity of wind developers from outside, he told me.

Keith's interest verges on the artisitic. "What I learned in college was that aesthetics are about social constructs, about what we expect from our lives. Are we defined by hayfields strewn with rotting manure and mountains left to grow wild without any consideration of financial development needs? When I look up, I want to see the future!"

There are, of course, some holdouts who fear the changes Randy represents. Others selfishly want to preserve a system they have benefited from, however backward. Randy admits that the campaign to win their hearts and minds will be long and hard.

"We may not ever convince some of them," he says. "But we're going in there anyway, because that's our duty as world citizens. Sooner or later they'll have to get used to it. Our mission is bigger than any one of us."

Keith Dewley's daughter Hilary, a proud sophomore at the University of Vermont, echoed the enthusiasm of her elders. "The ancient Egyptians built pyramids as monuments to their beliefs. That's what wind turbines are -- just knowing they're there we can feel better going about our business."

Progress wouldn't be possible without a strong government commitment. I am currently embedded with an analyst in Goldman Sachs and will be writing soon about why massive profits are necessary to guarantee the success of wind power development.

categories:  wind power, wind energy, Vermont, Judith Miller

Wind power facts

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

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