Articles filed under Technology from Iowa
Technologies exist that can be built into the turbine. Although they are used in Canada, Denmark and Sweden, Hu said the U.S. wind industry has found them to be cost-prohibitive.... blades can incorporate a material that conducts electricity that can prevent icing by warming the blade. He said the cost for the power amounts to roughly 5% of the energy a turbine might typically produce.
Iindustry publication Recharge in May reported on the height advantage of the 120-meter all-concrete towers Acciona plans to offer. It said the higher tower height and an enormous 116-meter rotor would extend the reach of Acciona's new turbine.
Iowa Stored Energy Park Agency director Bob Schulte said that geology tests found the storage reservoir wasn't suitable for the scale of project officials envisioned. Essentially, the quality of the storage rock, which would have been sandstone, wasn't as good as officials were looking for.
Wind energy is booming in Iowa, and backers say it's only the beginning. ...But the jobs could blow away, economists warn, just as other manufacturing jobs have disappeared because of competition and technological change. Other states want to attract manufacturers, too. Wind power depends on subsidies, and changes in government policies could dampen the enthusiasm for wind. ...John Solow, a University of Iowa economics professor, is cautiously optimistic about the future for wind generation and turbine manufacturing. Future policy decisions and technological innovations could change that, he said. A breakthrough in clean-burning coal, for example, could reduce interest in wind energy and biofuels, he said.
The top executive of a Warren-based wind-turbine blade maker said the decision to build a new manufacturing facility in Iowa, rather than in Rhode Island, was based on that state's proximity to the market in which the blades will be used. The blades made by TPI Composites are typically 35 meters to 40 meters long, and can weigh 10,000 to 20,000 pounds each, said Steven C. Lockard, chief executive officer of the company. Transportation costs for these blades, which are typically shipped by truck, can run into the "tens of thousands" of dollars, he said in a telephone interview Wednesday. "In this case, there really wasn't an option for this particular factory to be located in Rhode Island," he said.
... a coalition of local utilities is grappling with one of the thorniest challenges in the field of renewable power: how to store the excess energy windmills create when demand is low so it can be used later, when the need is greater. The group is building a system that will steer surplus electricity generated by a nearby wind farm to a big air compressor. Connected to a deep well, the compressor pumps air into layers of sandstone. Some 3,000 feet down and sealed from above by dense shale, the porous sandstone acts like a giant balloon. Later, when demand for power rises, this flow is reversed.
[Iowa Governor] Culver says Iowa isn't the only state vying for the European companies. "It's a very competitive environment," Culver says,"just with wind alone, we're talking about a 20 billion dollar impact on six or seven states over the next seven years, so we want to be very aggressive in terms of selling Iowa, and encouraging people to come here."
MINNEAPOLIS (AP) - A group of utilities in Iowa, Minnesota and the Dakotas plan to spend $200 million on a project in Iowa that would store energy generated by wind turbines. The Iowa Stored Energy Park would essentially act as a "battery" for wind energy, said Bob Haub, executive director of the Iowa Association of Municipal Utilities. Wind farms in Iowa, Minnesota and the Dakotas would ship energy over the power grid to the storage park near Des Moines. Xcel Energy and the federal government are experimenting with ways to "store" wind power in the form of hydrogen, but the Iowa project would employ a far simpler strategy that would include the following steps:
Iowa’s municipal utilities announced plans Friday to build a $200 million power plant west of Dallas Center that will store wind energy in the ground and use it to generate up to 268 megawatts of electricity. The announcement is a culmination of more than four years of study and research by the Iowa Association of Municipal Utilities and others, although operation of the plant is still several years away. Construction would begin in 2009 with completion expected in 2011, said John Bilsten, general manager of Algona Municipal Utilities and vice president of the newly formed Iowa Stored Energy Park Agency. Only two similar wind storage plants are in existence, one in Germany and the other in Alabama. Both are about half the size of the plant planned for Dallas County, Bilsten said.