Sat, Nov 22, 2008
 The Solana Generating Station to be built by a Spanish firm in Gila Bend will have 140-megawatt steam generators that, operating at full capacity, will produce enough electricity to power 70,000 homes.
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Tucson, Arizona | Published: 02.22.2008
PHOENIX — A Spanish company is planning to take 3 square miles of desert southwest of Phoenix and build one of the largest solar power plants in the world.
Abengoa Solar, which has plants in Spain, northern Africa and other parts of the U.S., could begin construction as early as next year on the 280-megawatt plant in Gila Bend — a small town 50 miles southeast of Phoenix. The company said Thursday it could be producing solar energy by 2011.
Abengoa would build, own and operate the $1 billion plant, named the Solana Generating Station.
Arizona Public Service, the state's largest utility, would pay Abengoa $4 billion over 30 years for the energy produced, estimated to be enough to supply up to 70,000 homes at full capacity.
APS filed for approval of the plant with Arizona's public utilities regulator Thursday. The plant also hinges on an extension of the federal solar investment tax credit, which APS and Abengoa said they're confident will happen.
If approved, the plant will triple the amount of renewable energy APS produces. Now, about 1 1/2 percent of the utility's energy comes from renewable sources.
Arizona regulators are requiring utilities to get 15 percent of their electricity from renewable sources by 2025, with annual increases of roughly 1 percent.
The Solana plant will bring APS to around 5 percent in 2011, said Don Robinson, the utility's senior vice president of planning and administration.
Unlike most solar energy, Solana will use the sun's heat, not its light, to produce power. Gila Bend can get as hot as 120 degrees in the summer.
Abengoa CEO Santiago Seage said the plant will use thousands of giant mirrors to harness the sun's heat. That will heat up liquids, which will spin turbines — just like coal or other power plants but without the pollution.
He said using heat will allow the plant to produce power even after the sun has gone down.
"We receive the heat from the sun and we use a fluid that becomes very hot. And we can keep it hot for a long time and release that heat for a long time," he said. "It's like coffee. You can make it hot, keep it hot for a few hours and drink it anytime you want."
Arizona Gov. Janet Napolitano said she envisioned the state as a solar powerhouse.
"There is no reason that Arizona should not be the Persian Gulf of solar energy," she said.
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