Kevin Luke of Buford-based Z-4 Energy Systems wants to develop a way to save wind energy for when the wind's not blowing. He's working on a commercialization plan for wind-powered water pumping, incorporating compressed air storage. Luke points out that wind is variable and energy storage is needed to provide controlled, consistent water pumping. He seeks to use air compressors, similar to those found commercially, powered by a wind turbine rotor. The driving force behind his efforts is that the wind blows at variable speeds and when there is not enough wind to turn the turbine, the stored air can continue to be used to pump the well. Currently, wind electric and solar powered systems use lead acid batteries for storage, which don't perform well in the cold weather and have a short lifespan.

Industry leaders believe wind could fill up to 20 percent of generation portfolio. But even wind proponents warn against the notion that it can solve the nation's energy and greenhouse gas concerns. "Wind is a great technology ... But it's not a panacea." There's fossil fuel consumption in the maintenance of wind farms. Many prime wind resources are located far from areas where renewable energy is in demand. Even here at the Foote Creek wind facility, where high gusts wreak havoc on turbines, lightning strikes are equally troublesome. "You've got to look at it for what it is," said Borrows.

Greenblatt noted that while wind power could produce impressive amounts of peak energy during strong gusts, the biggest problem was wind power’s intermittency. The problem could be addressed by a process called compressed air energy storage, where excess energy could be used to pump compressed air into underground storage facilities that could include abandoned mines. When the wind was not blowing, he said, the compressed air could be tapped and combined with the burning of natural gas to create high-efficiency electrical generators approximating the efficiency levels of coal-fueled power plants.

The new turbines are more efficient and less costly than propeller-driven machines and earlier versions of TMA's own mills, officials say.