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Power Harvests.



The salvation of many U.S. farmers may be blowing in the wind

During the Vietnam War Vietnam War, conflict in Southeast Asia, primarily fought in South Vietnam between government forces aided by the United States and guerrilla forces aided by North Vietnam. , Daniel Juhl toiled as a missile-guidance technician. But when he left the service, he says, "there wasn't a lot of call for my training. So, I thought I'd turn my spears into plowshares."

Or, to be more literal In programming, any data typed in by the programmer that remains unchanged when translated into machine language. Examples are a constant value used for calculation purposes as well as text messages displayed on screen. In the following lines of code, the literals are 1 and VALUE IS ONE. , into energy-generating wind turbines. In 1978, Juhl entered the wind-farming industry, helping design and erect e·rect
adj.
1. Being in or having a vertical, upright position.

2. Being in or having a stiff, rigid physiological condition.
 small commercial systems for others--first in his home state of Minnesota, then in California, Europe, and China.

A few years ago, he decided to build and operate his own wind farm. On patches of land amounting to 6 acres, which he leased from a nearby farming family in Woodstock, Minn., he built access roads and erected 17 turbines. For the past 2 years, this operation has been generating up to 10 megawatts (MW) of electricity, depending on the winds. The local utility buys Juhl's commodity at about half of what residential customers will pay to use this electricity.

Heartened by the profitable cash flow of Juhl's operation and his turbines' low maintenance demands, the farmers from whom he leased land decided that they, too, were ready for a direct role in wind power. With Juhl's help, they're planning to install two units of their own.

Juhl expects wind turbines to be sprouting up far and wide in coming years. "Talk to some farmer for half an hour, and he'll understand what this--just another cash crop," he says. It's not much different from reaping wheat, he notes, "except that your combines are 200 feet in the air."

Although pioneers of wind power in the mid-1970s tended to erect their wind farms on remote mountain peaks and passes, the present crop of wind advocates has begun turning to agricultural lands.

There's plenty of untapped wind to be had there. Wind mappers rank regions on their ability to produce commercially significant power using a 6-point scale. The higher the number, the greater and more reliable the wind resource. Today, "we're developing commercial wind farms in areas rated class 4 to class 6," says Greg Jaunich, president of Northern Alternative Energy in Minneapolis.

"Within 100 miles of every major metropolitan area, there's at least a class 4 wind resource," notes Jaunich. Most of these are farmed areas, which is why he and other commercial developers of environmentally attractive, or green, power have been leasing land there.

Farmers welcome the second income these offer. In Iowa, each quarter acre In Australian and New Zealand English, a Quarter Acre is a term for a suburban plot of land. Traditionally, Australians and New Zealanders aspire to own a 3- or 4-bedroom house or bungalow on a section of around a quarter of an acre (about 1,000 square meters), also known locally  that a farmer makes available to a developer's turbine turbine, rotary engine that uses a continuous stream of fluid (gas or liquid) to turn a shaft that can drive machinery.

A water, or hydraulic, turbine is used to drive electric generators in hydroelectric power stations.
 --often with blades spanning 150 feet--can yield royalties of about $2,000 a year, notes agricultural economist Lester R. Brown, president of the Earth Policy Institute in Washington, D.C. Adds Brown: "In a good year, that same plot might produce $100 worth of corn."

Farmers who develop those wind resources themselves can reap far bigger bounties--up to perhaps $20,000 per turbine annually, Juhl claims.

Globally, wind generation Of electricity has nearly quadrupled over the past 5 years, and in the United States United States, officially United States of America, republic (2005 est. pop. 295,734,000), 3,539,227 sq mi (9,166,598 sq km), North America. The United States is the world's third largest country in population and the fourth largest country in area. , it's expected to grow 60 percent this year alone. As farmers struggle to make ends meet, "some are now finding salvation in this new `crop,'" Brown observes. "It's like striking oil, except that the wind is never depleted de·plete  
tr.v. de·plet·ed, de·plet·ing, de·pletes
To decrease the fullness of; use up or empty out.



[Latin d
."

The profitability of wind power has blossomed over the past few decades. A kilowatt-hour (kWh), the basic unit of delivered electricity, is equal to the energy consumed by a 100-watt light bulb bulb, thickened, fleshy plant bud, usually formed under the surface of the soil, which carries the plant over from one blooming season to another. It may have many fleshy layers (as in the onion and hyacinth) or thin dry scales (as in some lilies)—both of which  burning for 10 hours. In the mid-1970s, commercial wind turbines cranked crank 1  
n.
1. A device for transmitting rotary motion, consisting of a handle or arm attached at right angles to a shaft.

2. A clever turn of speech; a verbal conceit: quips and cranks.
 out electricity at 30 cents or more per kwh. That was a staggering amount, considering that coal-fired plants were generating it for about 2 cents/kWh.

Today, some wind turbines can generate power for less than 6 cents/kWh while utilities are, in some cases, charging customers more than twice that. Large wind farms sited where the air flow is reliable and strong can now produce electricity for as little as 3 cents/kWh--40 percent less than was possible with the best turbines a mere 5 years ago. For comparison, earlier this year, power-strapped California utilities were forced at times to buy electricity on the spot market for up to 33 cents/kWh.

Compared with more traditional--and more polluting--forms of electrical generation, wind power can be competitive economically, notes energy economist Florentin Krause of the International Project for Sustainable Energy
This article is about a concept related to renewable energy, of which sustainable energy is a superset.


Sustainable energy sources are energy sources which are not expected to be depleted in a timeframe relevant to the human race, and which
 Paths in El Cerrito El Cerrito (ĕl sərē`tō), city (1990 pop. 22,869), Contra Costa co., W Calif., on San Francisco Bay; inc. 1917. It is primarily residential. Golden Gate Fields Racetrack is nearby. , Calif. "It's dirt cheap Adj. 1. dirt cheap - very cheap; "a dirt cheap property"
cheap, inexpensive - relatively low in price or charging low prices; "it would have been cheap at twice the price"; "inexpensive family restaurants"
," he says.

Indeed, he's found that the cost of wind-generated electricity is now about half the cost of nuclear power if all expenses--from facilities' construction and maintenance to demolition and disposal--are taken into account.

Solar photovoltaic The generation of voltage by a material that is exposed to light in the visible and invisible ranges. See photoelectric and photovoltaic cell.  electricity and other types of renewable power, he observes, typically need a substantial subsidy, such as a tax break, to even come close to competing with power from fossil-fired and nuclear plants.

What's more, Krause points out, unlike large, traditional generating stations that can take years to construct, wind turbines can be erected in 3 months--and they operate without spewing the greenhouse gases greenhouse gas
n.
Any of the atmospheric gases that contribute to the greenhouse effect.



greenhouse gas 
 that fuel global warming global warming, the gradual increase of the temperature of the earth's lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution. .

The most impressive aspect of wind power to Randall Swisher swisher Sexology A regional term for a really queer queer, not that there's anything wrong with that , executive director of the American Wind Energy Association The American Wind Energy Association (AWEA), which formed in 1974, is the national trade association of the U.S. wind energy industry. The association's membership includes turbine manufacturers, wind project developers, utilities, academicians, and interested individuals.  in Washington, D.C., is the magnitude of the supply. The U.S. wind-power potential, he says, "is comparable to or larger than Saudi Arabia's energy resources." In fact, Brown's research indicates that all current U.S. electricity needs could be met from wind resources in just three especially breezy states: North Dakota North Dakota, state in the N central United States. It is bordered by Minnesota, across the Red River of the North (E), South Dakota (S), Montana (W), and the Canadian provinces of Saskatchewan and Manitoba (N). , Kansas, and Texas.

Even so, utilities have been slow to embrace the wind, and most farmers remain unaware of the value of the breezes rushing over their fields, notes Lisa Daniels Lisa Daniels is a journalist and an alternative anchor on NBC's Weekend Today. She is married and lives in New York City.[1]

Daniels graduated first in her class from Hamilton College in 1994, majoring in math and history.
. That's why she founded Windustry. The 6-year-old Minneapolis organization has provided state farmers and rural landowners, including Native American communities, with a nuts-and-bolts overview of wind's prospects and what it takes to harness that potential.

Windustry and the American Corn Growers Association, based in Washington, D.C., recently banded together to help landowners nationwide find ways to overcome the obstacles to owning the infrastructure to generate wind power.

Consider financing. From Juhl's experience, one of the biggest obstacles to small-scale wind farming is a need to "educate bankers." Unlike most other businesses, he says, wind systems "have a positive cash flow right out of the box. Each year, they produce enough `crop' to pay the debt, to pay expenses, and to put money in your pocket." With no experience in such investments, the banks were dubious--and reluctant to issue a loan.

Independent owners of renewable-energy systems, which include wind farms, face yet another formidable challenge--negotiating with the local utility to sell their product at a profitable rate. Most small wind farmers lack the leverage and experience to cut good deals, according to according to
prep.
1. As stated or indicated by; on the authority of: according to historians.

2. In keeping with: according to instructions.

3.
 speakers at last month's American Wind Energy Association's meeting in Washington, D.C.

Another disadvantage for wind farmers comes from regulatory hurdles. Big central-station power plants typically need to clear these hurdles just once to put 500 MW on line. In contrast, to get the same wattage wattage

the output or consumption of an electric device expressed in watts.
 on line, small-scale wind generators may collectively go through these transactions 200 or more times--and in as many regulatory jurisdictions.

Perhaps the biggest constraint Constraint

A restriction on the natural degrees of freedom of a system. If n and m are the numbers of the natural and actual degrees of freedom, the difference n - m is the number of constraints.
 to wind power's growth is getting the crop to market. The greatest technological need for rural wind-power development, Swisher argues, is not better turbines or electronics but "transmission infrastructure." Overcoming this, he says, "is our number one long-term priority."

Linda Taylor, Minnesota's deputy commissioner of energy, agrees. Moving electricity from rural turbines to energy-gobbling cities, she says, "is the only real sticking point sticking point
n.
A point, issue, or situation that causes or is likely to cause an impasse.

Noun 1. sticking point - a point at which an impasse arises in progress toward an agreement or a goal
 for massive wind development."

It's already constraining con·strain  
tr.v. con·strained, con·strain·ing, con·strains
1. To compel by physical, moral, or circumstantial force; oblige: felt constrained to object. See Synonyms at force.

2.
 development of Buffalo Ridge Buffalo Ridge is a large expanse of rolling hills in the southeastern part of the larger Coteau des Prairies, and is the second-highest point in Minnesota standing 1,995 feet (608 m) above sea level.  in southwest Minnesota, where winds blow steadily 320 days a year. Hundreds of turbines there are slated to deliver 450 MW of wind by the end of next year. However, Taylor told SCIENCE NEWS, "we could easily get 3,000 or 4,000 MW of wind energy out of that area if we could get the transmission problem resolved." That's enough energy to power some 1 million homes.

R. Nolan Clark, an agricultural engineer and director of the Agriculture Department's Conservation and Production Research Laboratory in Bushland, Texas This article is about community in Texas. For other meanings, see Bushland (disambiguation).
Bushland is an unincorporated community in southwestern Potter County, Texas (USA).
, sees much the same problem in his part of the country. Since most transmission lines outside of urban areas were installed in the 15 years following World War II, they are, in his words, "old and antiquated."

Sized to carry power needs of the 1950s, they're hard-pressed to satisfy the far more electricity-hungry households throughout even rural America today. As a result, many of these lines can't transmit more power, he says. Indeed, Taylor observes that any additional power fed into such lines in her state can and often does overload See information overload and overloading.  them. "This shuts the whole system down," she says.

These limitations highlight a major disconnect disconnect - SCSI reconnect  between the way power lines are configured con·fig·ure  
tr.v. con·fig·ured, con·fig·ur·ing, con·fig·ures
To design, arrange, set up, or shape with a view to specific applications or uses:
 and the new needs of small, distributed generators. An analogy with blood circulation illustrates the problem. Big trunk lines, like arteries Arteries
Blood vessels that carry oxygenated blood away from the heart to the cells, tissues, and organs of the body.

Mentioned in: Adrenergic Blockers, Angiotensin-Converting Enzyme Inhibitors, Antihypertensive Drugs, Hypertension, Thrombolytic Therapy,
, branch into successively smaller lines, like capillaries Capillaries
The smallest arteries which, in the lung, are located next to the alveoli so that they can pick up oxygen from inhaled air.

Mentioned in: Adult Respiratory Distress Syndrome, Birthmarks, Platelet Count

, which feed local areas including individual residences. Operators of distributed-power systems usually have access only to the smaller lines, although their needs require a large artery.

Upgrading rural lines would solve the problems, but at a cost of up to $1 million per mile, Swisher notes. An alternative plan might use wind to generate hydrogen on the farm, and off the grid, and then to pipe hydrogen to cities for use in automotive fuel cells (see box, page 46).
Will rural winds power urban cars?

"Hydrogen is the fuel of choice for
the new, highly efficient fuel cell engine
that every major automaker is now
working on," says Lester Brown, president
of the Earth Policy Institute in
Washington, D.C. With Daimler Chrysler
planning to roll out its first emissions-free,
fuel cell-powered cars in 2003, he
says, "Ford, Toyota, and Honda will
probably not be far behind."

What if electricity from wind-powered
turbines in North Dakota broke down
water into hydrogen, which could be
piped 1,600 miles to Chicago vehicles?
Bill Leighty, director of the Leighty
Foundation in Juneau, Alaska, presented
results from a new study that projected
the economics of this 2010 scenario.

Last month at the American Wind
Energy Association's annual meeting in
Washington, D.C., he described a system
in which operators in North Dakota
would use 4,500 MW of wind-derived
electricity to power off-the-shelf electrolyzers.
The system would then pressurize
the hydrogen gas and feed it into
2-meter pipelines.

The economics of this scenario remains
vexing. Its cost would be 30 to 45
percent more per unit of energy than
that of building electrical transmission
lines to link the Dakota wind farms with
the power grid serving Chicago, the
new study estimates. However, Leighty
points out, breakeven could occur in
other scenarios. For example, today's
considerable research efforts could
lead to fuel cells that are somewhat
cheaper to make and operate.

Moreover, he adds, there are potential
advantages to a hydrogen pipeline that
economists currently find hard to value.
For instance, it would--as its natural gas
counterparts do--store several days'
worth of energy in the system. Therefore,
temporarily becalmed turbines wouldn't
disrupt downstream operations.

Also, it may prove less expensive to
add distributed sources, such as wind
turbines, to a pipeline route than to a
transmission line.

Finally, there's the potential that pollution
taxes in the future could significantly
increase the cost of fossil-fuel
systems and tilt the economic balance
in favor of emissions-free power, including
fuel cells. Indeed, many energy analysts
argue that the only way the United
States could ever meet the projected
caps on carbon emissions being discussed
under the Kyoto Protocol (SN:
12/20&27/97, p. 388) would be to tax
people who spew carbon dioxide from
combustion engines and boilers.

Within a decade, Leighty predicts, a
technology harnessing wind to create
hydrogen for fuel cells could become
economically competitive.


For now, however, most developers aim to use wind to generate electricity for distribution and sale by commercial utilities. Already, a few big projects are in the works.

A 300-MW wind farm is being constructed along the Oregon-Washington border, where transmission lines can handle the load. This project will become the world's largest wind-harvesting system.

But a Goliath 10 times that size, tentatively named the Rolling Thunder Rolling Thunder Inc., established in 1987, is a veterans advocacy organization that works for the return of prisoners of war and missing in action from all of the conflicts of the United States.  project, is on the drawing board of Jim Dehlsen, founder of the pioneering wind-turbine company Zond, which was bought out by power giant Enron Corp. If built, this South Dakota South Dakota (dəkō`tə), state in the N central United States. It is bordered by North Dakota (N), Minnesota and Iowa (E), Nebraska (S), and Wyoming and Montana (W).  network of turbines would be "one of the largest energy projects of any kind in the world," points out Brown of the Earth Policy Institute.

Windustry, however, is banking on small farm- and ranch-owned operations becoming the backbone of U.S. wind-power development. To foster that, Daniels says, her group is trying to see if next year's federal Farm Bill can include incentives for the development of farmer-generated commercial power. These might include guaranteeing bank loans, easing access to transmission systems, and facilitating development of wind-electric cooperatives. After all, Daniels argues, "wind is the best new crop to come along in many years."

Moreover, she points out that small-scale wind farming keeps much of its income in the local economy. That's good because wind resources are often strong in areas with poor soils. In such areas, it doesn't take a huge investment to make a big impact. A few Minnesota wind farms "have basically resurrected several small towns," Taylor notes.

And that's just the beginning, Brown says. He anticipates that people--call them wind prospectors--skilled at pinpointing the best places for wind farms could soon assume a role "comparable to that of the petroleum geologist in the old energy economy."
COPYRIGHT 2001 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2001, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Title Annotation:wind power for farms
Author:RALOFF, JANET
Publication:Science News
Geographic Code:1USA
Date:Jul 21, 2001
Words:2274
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