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Craigslist headquarters in the Inner Sunset District of San Francisco prior to 2010. The site serves more than 20 billion [17] page views per month, putting it in 72nd place overall among websites worldwide and 11th place overall among websites in the United States (per Alexa.com on June 28, 2016), with more than 49.4 million unique monthly visitors in the United States alone (per Compete.com ...
Doubly fed induction generator (DFIG), a generating principle widely used in wind turbines. It is based on an induction generator with a multiphase wound rotor and a multiphase slip ring assembly with brushes for access to the rotor windings. It is possible to avoid the multiphase slip ring assembly, but there are problems with efficiency, cost ...
California was the first U.S. state where large wind farms were developed, beginning in the early 1980s. [6] By 1995, California produced 30 percent of the entire world's wind-generated electricity. [7] Wind power in Texas surpassed the production in California to become the leader in the United States.
Solar Energy Generating Systems (SEGS) is a concentrated solar power plant in California, United States.With the combined capacity from three separate locations at 354 megawatt (MW), it was for thirty years the world's largest solar thermal energy generating facility, until the commissioning of the even larger Ivanpah facility in 2014.
The Ivanpah system consists of three solar thermal power plants on 3,500 acres (1,400 ha) of public land near the California–Nevada border in the Southwestern United States. [17] Initially it was planned with 440 MW gross on 4,000 acres (1,600 ha) of land, but then downgraded by 12%. It is near Interstate 15 and north of Ivanpah, California. [18]
The original device used a generator Oliver had salvaged from an old roller coaster at Seal Beach, California. Oliver and Sperry fitted the generator with aluminum propellers, and placed a large funnel on the front to concentrate the wind's power. They set the entire device on a circular rail that allowed it to be pivoted to face prevailing ...
In the electrical wiring of buildings, a cable tray system is used to support insulated electrical cables used for power distribution, control, and communication. Cable trays are used as an alternative to open wiring or electrical conduit systems, and are commonly used for cable management in commercial and industrial construction. They are ...
The college operates extension programs through the New York State Agricultural Experiment Station (NYSAES) in Geneva, New York, in 20 buildings, including the Barton Laboratory Greenhouse and Sutton Road Solar Farm [15] (a 2-megawatt energy facility that offsets nearly 40 percent of NYSAES annual electricity demands), on 130 acres (0.5 km 2 ...