$4m ‘superwire’ could blow offshore wind energy market wide open by Tina Casey

CleanTechnica

Researchers at the University of Houston have just won a new round of funding for a $4 million wind power project that is on track to solve a key wind energy transportation conundrum: how to use superconducting wire without running afoul of the magnetic field generated by wind turbines. The new grant of $900,000 from the Department of Energy comes on top of two earlier DOE grants totaling $3.1 million. If the project is a success, it will lead to the commercial production of low-cost superconducting wire for wind turbine generators, and that will open up the field for low-cost wind power, especially offshore wind turbines.Superconductors and Magnetic FieldsWire made of superconducting material can transport an electrical current with virtually no resistance, so it is far more efficient than conventional copper wire.

That would seem to make superconducting wire an ideal material for wind turbine generators, but the problem is that wind turbines kick up a magnetic field.

The field creates “flux lines” in the superconducting wires, resulting in significantly lower performance.

The University of Houston team, led by mechanical engineering professor Venkat “Selva” Selvamanickam, has the goal of developing a high-temperature superconducting wire that can achieve significant gains in efficiency despite the magnetic field, and compete with copper wire on cost.

The result will be a powerful but lightweight, low-maintenance, high-efficiency generator with a power rating of 10 megawatts or more, which would be ideal for use in offshore wind turbines.

On Track for Low Cost Wind Power

So far, the three-year project has far outpaced expectations. The end goal is to achieve a 400% performance improvement in superconducting wire, with an interim goal of 50% by the end of 2012.