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The Ivanpah Solar Electric Generating System is a concentrated solar thermal plant in the California Mojave Desert, 64 km (40 miles) southwest of Las Vegas, with a gross capacity of 392 megawatts (MW).〔 It deploys 173,500 heliostats, each with two mirrors, focusing solar energy on boilers located on three centralized solar power towers. Unit 1 of the project was connected to the grid in September 2013 in an initial sync testing.〔(【引用サイトリンク】title=Business Wire: Ivanpah Solar Electric Generating System Reaches 'First Sync' Milestone )〕 The facility formally opened on February 13, 2014,〔 and it is currently the world's largest solar thermal power station.〔(【引用サイトリンク】title=World largest solar thermal plant syncs to the grid )〕〔("World's Largest Solar Thermal Power Project at Ivanpah Achieves Commercial Operation" ), NRG press release, February 13, 2014.〕 The project was developed by BrightSource Energy and Bechtel.〔 〕 It cost $2.2 billion; the largest investor in the project is NRG Energy, a power generating company based in Princeton, New Jersey, that has contributed $300 million. Google has contributed $168 million.; the U.S. government provided a $1.6 billion loan guarantee.〔 In 2010, the project was scaled back from the original 440 MW design, to avoid building on the habitat of the desert tortoise. In November 2014, Associated Press reported that the plant was producing only "about half of its expected annual output". The California Energy Commission issued a statement blaming this on "clouds, jet contrails and weather".〔(Huge solar plant lags in early production ), Associated Press, November 17, 2014〕 However, in the first quarter of 2015, Ivanpah generation was up 170 percent over the same quarter in 2014 – 108 gigawatt-hours compared to 40 GWh, according to the Energy Information Administration.〔http://breakingenergy.com/2015/06/17/ivanpah-solar-production-up-170-in-2015/〕 == Description == The Ivanpah Solar Electric Generating System consists of three solar thermal power plants on a tract of public land near the Mojave Desert and the California—Nevada border in the Southwestern United States near Interstate 15 and north of Ivanpah, California. The site is visible from adjacent Mojave National Preserve, Mesquite Wilderness, and Stateline Wilderness.〔 The facility consists of fields of heliostat mirrors focusing sunlight on receivers located on centralized solar power towers. The receivers generate steam to drive specially adapted steam turbines. For the first plant, the largest ever fully solar-powered steam turbine-generator set was ordered, using a 123 MW Siemens SST-900 single-casing reheat turbine.〔Siemens press release (Siemens to supply 123 MW steam turbine-generator set for solar thermal power plant in California )〕 Besides steam-turbine generators Siemens supplied instrumentation and control systems. Final approval was gained in October 2010.〔(BrightSource secures final approval for Ivanpah solar project ), BusinessGreen.com staff, BusinessGreen, 08 Oct 2010〕 On October 27, 2010, California Governor Arnold Schwarzenegger, Interior Secretary Ken Salazar, and other dignitaries gathered in the Mojave Desert to officially break ground on the project.〔 The project generated controversy because of the decision to build it on ecologically intact desert habitat. The project has received a $1.6 billion loan guarantee from the U.S. Department of Energy. The total cost of the project is about $2.18 billion. The facility has contracts to sell about two-thirds of the power generated at Ivanpah to PG&E, and the rest to SCE.〔 The largest investor in the project is NRG Energy, a generating company based in Princeton, N.J., that has put in $300 million.〔 The project has also received an investment of $168 million from Google, but in November 2011, Google announced that they would no longer invest in CSP due to the rapid price decline of photovoltaic systems, and stopped its research on the project.〔(Google cans concentrated solar power project ) ''Reve'', 24 Nov 2011. Accessed: 25 Nov 2011.〕〔(Google Renewable Energy Cheaper than Coal (RE 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ivanpah Solar Power Facility」の詳細全文を読む スポンサード リンク
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