Offshore Wind: An Untapped Energy Source

By Jean, Grace V. | National Defense, May 2009 | Go to article overview

Offshore Wind: An Untapped Energy Source


Jean, Grace V., National Defense


* In the United States, the wind-energy industry has risen an average of 32 percent per year during the last five years. But despite efficiency improvements and other technology developments, the country still lags behind European and Asian nations in harvesting wind--particularly, offshore wind--for electricity.

Wind is now the world's fastest growing energy source.

Germany leads in this realm. Some of its regions, along with nearby nations Denmark and Spain, produce 10 to 25 percent of their respective nations' electricity with wind.

So far, wind provides little more than 1 percent of the total U.S. electricity supply. Last year, the nation's land-based wind energy farms generated an estimated 48 billion kilowatt-hours--enough to power 4.5 million homes. But the U.S. wind energy potential is estimated at 10,777 billion kilowatt-hours--double the total amount of electricity generated in the country today.

[ILLUSTRATION OMITTED]

President Obama has called for a doubling of renewable energy production in the next three years. He also wants to establish a national standard that would require utilities to increase that share to 25 percent by 2025.

"If we get that type of policy direction from the leadership in the federal government, then that will really push the market," says David Blazer, a principal consultant at EcoLogix Group, a firm based in Annapolis, Md.

Several states already have adopted "renewable portfolio standards" that require a small percentage of electricity production to derive from renewable sources, such as solar and wind.

Blazer says that meeting the Obama administration's higher utilities standards would require additional resources.

"The only way a lot of states are going to be able to achieve that is with offshore wind," he says.

So far, there are no offshore wind farms in the United States.

Europe, however, has 30 such wind parks, each with 100 to 150 spinning turbines that produce electricity for a number of nations.

Turbines located several miles off a nation's coastline produce electricity more reliably because the wind tends to flow more consistently over the ocean. Offshore winds blow 85 to 90 percent of the time, compared to 40 to 60 percent over land.

The Energy Department in a report found that offshore wind could comprise 54,000 megawatts of the 300,000-megawatt capacity necessary to power 20 percent of the nation's electricity by wind energy alone. …

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