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World's first concrete-composite floating platform wind turbine
 
 

The us Energy Department recognized the nation's first grid-connected offshore floating wind turbine prototype off the coast of Castine, Maine. Led by the University of Maine, this project represents the first concrete-composite floating platform wind turbine to be deployed in the world.
 
Offshore wind represents a large, untapped energy resource for the United States, offering over 4,000 gigawatts of clean, domestic energy potential - four times the nation's current total generation capacity.

In Maine, as with many other areas off U.S. coasts, the bulk of this clean, renewable energy resource lies in deeper waters where conventional turbine technology is not practical. Innovative floating offshore wind turbines, like the one launched on Friday, will open up new economic and energy opportunities for the country.
 
With the support of a $12 million Energy Department investment over five years, University of Maine and its project partners conducted extensive design, engineering and testing of floating offshore wind turbines, followed by the construction and deployment of its 65-foot-tall VolturnUS prototype.

At 1:8th the scale of a commercial installation, this project will collect data to validate and improve floating wind turbine designs, while helping to address technical barriers to greater offshore wind cost reductions.
 
The University of Maine design uses advanced materials that help reduce the overall cost of the system while ensuring high performance and efficiency. For example, the floating wind turbine features a unique semi-submersible platform that uses a lower cost concrete foundation in addition to a lighter weight composite tower.

As part of the five-year project, the Maine Maritime Academy helped test and conduct analysis on these pioneering designs, while Pittsfield, Maine-based Cianbro Corporation leveraged its experience in maritime energy infrastructure and ship building to construct this first-of-its-kind wind energy system.
 
The VolturnUS technology is the culmination of more than five years of collaborative research and development conducted bythe UMaine-¡©led DeepCwind Consortium. The DeepCwind research program is a unique public-¡©private partnership funded by the Department of Energy, the National Science Foundation-¡©Partners for Innovation, the Maine Technology Institute, the state of Maine, the University of Maine and more than 30 industry partners. Data acquired during the 2013 deployments off Castine and Monhegan will be used to optimize the design of UMaine's patent-¡©pending VolturnUS system.
 
As part of a separate project, the University of Maine is planning a larger offshore wind demonstration called Aqua Ventus I - one of seven offshore wind design and engineering projects announced last year by the Energy Department. Upon completion of the engineering and design phase, the Department intends to select up to three projects for additional funding in 2014 to support construction and installation.
 
 
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