Principle Power Raising $20M to Build World’s First Floating Wind Farm

3/2/09Follow @gthuang

Seattle wind energy startup Principle Power is in the process of raising $20 million to develop wind farms in the deep waters off the coast of Oregon and other locations. The financing deal is expected to close in the second quarter of this year, according to Principle Power CEO Alla Weinstein.

“We’re talking to a number of strategic investors,” says Weinstein, who adds that none of them are in the Seattle area, and none are venture capital firms. Last April, Principle Power raised $2.3 million from angel investors, most from the San Francisco area (many of them affiliated with the Keiretsu Forum angel network), and some in Europe. The company signed an agreement with Tillamook People’s Utility District in November to develop a 150-megawatt wind-power plant off the coast of Tillamook County, Oregon. And two weeks ago, Principle Power announced a deal with EDP, Portugal’s largest energy utility, to build a wind farm off the Portuguese coast.

Offshore wind turbines are not new, but all existing systems rest on the ocean floor in relatively shallow water. As Weinstein explains, there are two main reasons for putting wind farms offshore in the first place: to decrease their visual impact on residents and tourists, and to gain access to stronger and more consistent winds. The problem is that along many shorelines, like the West Coast of the U.S., the ocean gets deep fast. Go out just a few miles, and the water is already more than 40 meters deep—which causes major technical problems with conventional turbine installation and maintenance.

That’s where Principle Power’s technology comes to the fore. The company’s patent-pending foundation, WindFloat, is designed to support a 400-ton wind turbine and keep all of its associated machinery afloat (and properly aligned) in raging ocean swells—hardly an easy task. The platform is triangle-shaped, with the turbine sitting atop one corner; all three corners have submerged legs, or columns, that help stabilize the platform, Weinstein says. The columns, which are connected by trusses, are moored to the ocean floor and contain “water-entrapment plates” that keep the platform very stable at low cost, allowing the company to use off-the-shelf offshore wind turbine generators. The foundation is assembled on a wharf and then towed out to sea, which makes its installation manageable.

Until now, Denmark and the UK have led the world in offshore wind—so how did the Pacific Northwest get on the map? Weinstein, a Russian native and Honeywell veteran, previously founded AquaEnergy Group in Seattle, an ocean wave-energy company that was acquired in 2006 by … Next Page »

Gregory T. Huang is Xconomy's Deputy Editor, National IT Editor, and the Editor of Xconomy Boston. You can e-mail him at gthuang@xconomy.com or call him at 617-252-7323. Follow @gthuang

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  • http://www.gcube-insurance.com Curt Maloy

    As with many of these new concepts in wind turbine engineering, determining whether or not the design is insurable, even on an extremely limited basis, has likely been left to the last minute.

    Radical designs such as these should start with an evaluation of the insurability of the concept, both during construction / installation, and subsequent operation.

    Unless the design can be approved by an insurer’s engineering underwriting experts, coverage for damage to the equipment and resulting lost revenue will be impossible to obtain, and therefore the project will be difficult, if not impossible to finance.

    Complicating the situation is that such approvals by insurers are generally not issued for prototype designs, and require that a record of operational and loss history for the design be developed and reviewed before agreeing to issue coverage.

    This means the turbine designer must find a way to front the full cost of building, deploying and testing a prototype to prove the concept, without insurance coverage to limit his exposure during this time.

    In addition, many insurers and lending institutions will require that the turbine design be reviewed by recognized wind turbine certification agencies such as Germanischer Lloyd in Germany, and will require that a Type Certificate issued by such an agency be produced in order to consider offering insurance / project finance.

    We certainly do need to have innovative ideas brought to the renewable energy table, but an integral part of the equation is taking into account the reality of running a profitable power generating plant.

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  • Aditya Kulkarni

    It is really good that companies are working on floating wind turbines, but no one is publishing papers about the technology.
    papers ll be really helpful for the engineering students like me.

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