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Natural Bridges National Monument Solar Power System is a demonstration plant using solar cells as the energy source.〔. : Item # 2070, p. 90 ''The first power plant using solar cells was dedicated in the United States on June 7, 1980, by Governor Scott Matheson at Natural Bridges National Monument, Utah, USA.''〕〔 〕〔 〕〔 〕〔 〕〔 〕〔 〕 When it was dedicated in June 1980 by the Utah Governor, it was the world's largest solar plant at 100 kW.〔 It is located in the southeastern portion of the state of Utah in the United States. ==History== The power plant, located in Natural Bridges National Monument, was a joint venture between the U.S. National Park System, the U.S. Department of Energy, and the Massachusetts Institute of Technology's Lincoln Laboratory. The array of solar panels are located on near the park's visitor center. It has an observation platform overlooking the solar cells and recorded narration explaining the function of the facility. Natural Bridges' sunny climate makes it an ideal location for a solar cell power system. Its location far from available commercial power sources was a factor in site selection.〔 The project cost $15 million ($ in 2010 dollars), but a modern power plant would cost about $1.5 million because of technical advances in solar cell production.〔 The power plant operated for 10 years before it was shut down for overhaul and upgrading. The plant was downsized to 50 kW in 1993 and supplemented with a diesel generator backup system which allows the solar array to operate more efficiently.〔 The same year the restoration project added 18 kW of new solar modules, replaced the battery bank and upgraded the wiring. The existing power plant of solar cells provide 90 percent of the National Park community and visitor facilities electric power needs.〔 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「Natural Bridges National Monument Solar Power System」の詳細全文を読む スポンサード リンク
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