New manufacturing approach could reduce blade production costs by up to 40%
Would make wind energy as economical as fossil fuels without government subsidies
Will pave the way to longer blades that exceed 130 meters
In a move that could put wind energy on equal economic footing with traditional fossil fuels, GE (NYSE: GE), Virginia Polytechnic Institute & State University (Virginia Tech), and the National Renewable Energy Laboratory (NREL), will begin work on a project that could fundamentally change the way wind blades are designed, manufactured and installed.
With most of the cost of electricity for wind tied up in the initial capital investments made in the wind turbines themselves, new technology advancements that reduce these costs could substantially lower the overall cost of wind energy.
“GE’s weaving an advanced wind blade that could be the fabric of our clean energy future,” said Wendy Lin, a GE Principal Engineer and leader on the U.S. Department of Energy’s Advanced Research Projects Agency (ARPA-E) project. “The fabric we’re developing will be tough, flexible, and easier to assemble and maintain. It represents a clear path to making wind even more cost competitive with fossil fuels.”
According to GE, this new blade design could reduce blade costs 25%-40%, making wind energy as economical as fossil fuels without government subsidies.
GE’s research will focus on the use of architectural fabrics, which would be wrapped around a metal spaceframe, resembling a fishbone. Fabric would be tensioned around ribs which run the length of the blade and specially designed to meet the demands of wind blade operations. Conventional wind blades are constructed out of fiberglass, which is heavier and more labor and time-intensive to manufacture.
Advancements in blade technology will help spur the development of larger, lighter turbines that can capture more wind at lower wind speeds. Current technology doesn’t easily allow for construction of turbines that have rotor diameters exceeding 120 meters because of design, manufacturing, assembly, and transportation constraints. Wider, longer wind blades are tougher to move and maneuver, and molds which form the clamshell fiberglass structure cost millions of dollars to acquire. GE’s new fabric-based technology would all but eliminate these barriers.
With this new approach to making wind blades, components could be built and assembled on site, meaning design engineers no longer have to concern themselves with manufacturing and transportation limitations. Taken together, these improvements will help reduce start-up costs and the cost of wind-generated electric in general.
It’s estimated that to achieve the national goal of 20% wind power in the U.S., wind blades would need to grow by 50% — a figure that would be virtually impossible to realize given the size constraints imposed by current technology. Lighter fabric blades could make this goal attainable.
“Developing larger wind blades is the key to expanding wind energy into areas we wouldn’t think of today as suitable for harvesting wind power. Tapping into moderate wind speed markets, in places like the Midwest, will only help grow the industry in the years to come,” Lin went on to say.
The use of fabrics to reduce weight and provide a cost-effective cover dates back to the World War I era, when it was used on airplanes. Over the years fabric has proved to be rugged and reliable and GE has already begun using this spaceframe/tension fabric design in the construction of wind towers for better aesthetics, cost, and protection.
The $5.6M ARPA-E project will span three years. GE’s blade architecture will be built to achieve a 20 year life with no regular maintenance to tension fabrics required.
GE (NYSE: GE) works on things that matter. The best people and the best technologies taking on the toughest challenges. Finding solutions in energy, health and home, transportation and finance. Building, powering, moving and curing the world. Not just imagining. Doing. GE works. For more information, visit the company’s website at www.ge.com.
GE Power & Water provides customers with a broad array of power generation, energy delivery and water process technologies to solve their challenges locally. Power & Water works in all areas of the energy industry including renewable resources such as wind and solar; biogas and alternative fuels; and coal, oil, natural gas and nuclear energy. The business also develops advanced technologies to help solve the world’s most complex challenges related to water availability and quality. Numerous products are qualified under ecomagination, GE’s commitment to providing innovative solutions that maximize resources, drive efficiencies and help make the world work better. Power & Water’s seven business units include Aeroderivative Gas Turbines; Gas Engines; Nuclear Energy; Power Generation Services; Renewable Energy; Thermal Products and Water & Process Technologies. Headquartered in Schenectady, N.Y., Power & Water is GE’s largest industrial business.
GE Global Research is the hub of technology development for all of GE’s businesses. Our scientists and engineers redefine what’s possible, drive growth for our businesses, and find answers to some of the world’s toughest problems.
We innovate 24 hours a day, with sites in Niskayuna, New York; San Ramon, California; Bangalore, India; Shanghai, China; Munich, Germany; and Rio de Janeiro, Brazil.
Source: GE
For more information on: GE
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