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Solar Powered Thermal Power Plant
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Solar Powered Thermal Parabolic Trough Power Plant Dedicated
APS, Solargenix, Inc. and Schott North America, Inc. commemorated the completion of the first solar thermal parabolic trough power plant be built in Arizona on Earth Day, April 22, 2006.
2,800 Schott Solar thing film modules form the solar roof of New York's Stillwell Avenue subway station. This represents the world's largest thin film building-integrated PV solar system.
The Saguaro Solar Generating Station is the nation's first solar thermal parabolic trough power plant built specifically to produce electricity since 1988.
The Saguaro Station power plant was built by Solargenix, a solar energy development company based in Raleigh, NC, and a subsidiary of ACCIONA Energy of Spain, a world leading company devoted to renewables. The plant is operated by APS, Arizona's largest and longest-serving electric utility, based in Phoenix, AZ.
The 1 MW Saguaro Solar Generating Station has been generating electricity since December 2005, using several hundred PTR 70 solar receivers produced by Schott, an international leader in innovative solar solutions.
"Solar thermal parabolic trough power plants have the potential to be an important source of renewable energy as the world seeks to reduce its dependence on fossil fuels," said Dr. Udo Ungeheuer, Chairman of the Schott Management Board. "The Saguaro Power plant is a significant step forward for Arizona as it seeks to reach its goal of generating 15 percent of its electricity from renewable resources within the next 20 years."
The Saguaro Station power plant uses 100,000 square feet of parabolic mirrors to concentrate solar radiation onto its PTR 70 solar receivers. This solar radiation increases the temperature of the thermo-oil Heat Transfer Fluid (HTF) flowing through the receivers to 550 F. this heated fluid is then sued to turn water into steam, which drives a turbine and generates electricity.
The Saguaro Station power plant uses an organic rankin cycle system for its turbine/generator, which enables the plant to produce more power at lower temperatures. In addition, the organic rankin turbine can be operated automatically, reducing costs.
The Saguaro Station power plant is expected to produce 2000 MWh of electricity annually, enough electricity to meet the energy demands of about 200 households. The use of solar power to produce electricity at the plant, rather than fossil fuels, is equivalent to preventing the emission of millions of pounds of carbon dioxide into the atmosphere each year.

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