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Wind project likely to endure less energy loss than forecast  

Credit:  By Erin Rhoda, Staff Writer, The Kennebec Journal, www.kjonline.com 9 January 2011 ~~

HIGHLAND PLANTATION – When the developer of a wind farm said at the end of December that it would scale back its project, it may have overshot its estimation of how much energy production it would lose.

The developer, Highland Wind LLC, plans to build 39 turbines in Highland Plantation – a 19 percent reduction from its original proposal for 48 turbines. When it announced the reduction, it said it represented a 25 percent decrease in electricity output.

That amount, it turns out, is closer to 10 percent.

The revised application, which is pending review by the Land Use Regulation Commission, states that eight turbines are now barred from Stewart Mountain – the windiest location, but also the area closest to Bigelow Preserve.

Removing eight turbines from Stewart Mountain “eliminates almost 25 percent of the estimated energy production from the project and is a significant financial concession,” Rob Gardiner said in a statement Dec. 28.

Gardiner, a former Maine Public Broadcasting Corp. president, is a principal at Independence Wind – the entity that operates Highland Wind LLC – along with independent former Maine Gov. Angus King.

However, the company will not lose 25 percent of its estimated electricity output by reducing the number of turbines. The number is between 3 percent and 15 percent.

The proposed wind farm’s total production is projected at 306,000 million to 350,000 million kilowatt-hours of electricity per year, according to the newest documents filed with the state commission. The original number was 360,000 million kwh per year, according to the developer’s first application.

So where did the 25 percent estimation come from?

When the developer dropped the Stewart Mountain site, it also changed the type of turbine proposed for its remaining sites, Gardiner said.

The new kinds of turbines, one of which was put on the market recently, are a better fit for the amount of wind at the proposed sites and will produce more electricity than previously planned turbines.
If the developer had retained the old turbines, and reduced the quantity, the loss in energy production would have represented a 25 percent decrease, Gardiner said.

“We’re taking 39 turbine locations and putting in machines that may be more suited to the location in terms of converting potential wind energy into actual electricity. So our total output hasn’t really dropped that much,” Gardiner said. “The remaining 39 turbine spots can generate more power than the plan for those same turbines in the first application.”

The developer is now eyeing the GE 2.5-megawatt and the Siemens 2.3- and 3.0-megawatt turbines, Gardiner said. It had previously looked at the Vestas 3.0 and others. The Siemens 3.0 machine – which is designed to work in less windy locations with a higher efficiency – was not on the market when Independence Wind made its first application, in January 2010.

Source:  By Erin Rhoda, Staff Writer, The Kennebec Journal, www.kjonline.com 9 January 2011

This article is the work of the source indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this article resides with the author or publisher indicated. As part of its noncommercial effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Send requests to excerpt, general inquiries, and comments via e-mail.

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