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The 180MW Francis turbine-generator running at full speed was instantaneously stopped by a foreign body left in the penstock following maintenance.[7] The installation shifted about 2m within the base of the 180m high earth and rock fill gravity dam wall of the 3,906GL reservoir.
Francis inlet scroll at the Grand Coulee Dam Side-view cutaway of a vertical Francis turbine. Here water enters horizontally in a spiral-shaped pipe (spiral case) wrapped around the outside of the turbine's rotating runner and exits vertically down through the center of the turbine. The Francis turbine is a type of water turbine.
Gilkes installed three 10 MW horizontal-axis Francis turbines between 1996 and 2001, in stages while the facility was operating. The first turbine (K1) was installed in 1996, and was controlled by a simple PLC to maintain grid frequency. The other turbines (K2 & K3) were installed in 1999 and 2000.
Francis became fascinated with and tinkered with turbine designs, after Uriah A. Boyden first demonstrated his Boyden turbine in Lowell. The two engineers worked on improving the turbine. And in 1848, Francis and Boyden successfully improved the turbine with what is now known as the Francis turbine. Francis's turbine eclipsed the Boyden turbine ...
The cavern is 200 ft (61 m) long, 40 ft (12 m) wide and 30 ft (9.1 m) high. It houses four 1.8 MW Pelton turbine-generators and one 6.5 MW Francis turbine-generator. Water discharged from Plant 1, at a rate of up to 700 cu ft/s (20 m 3 /s), is returned to the river below the falls via a 650 ft (200 m) long tailrace tunnel. [12] [16] [17]
Its primary purpose is the generation of hydroelectricity and the original power station contained four Francis turbine-generators. The dam and its power plant was built to help France become less dependent on costly energy resource imports after World War I . [ 5 ]
The 1,800,000 cubic metres of rock excavated was used in roads, building the town site, and as dike material. The hall is about 300 m (980 ft) long, up to 25 m (82 ft) wide and about 50 m (160 ft) high. It houses 11 generating units. The Francis turbine wheels are cast of stainless steel and weigh 73 tonnes each.
1 dead, 1 injured 2006: De la Concorde overpass collapse: Laval, Quebec, Canada: Overpass: 5 dead, 6 injured 2007: Crab House – Floor collapsed into the water: Wildwood Crest, New Jersey, US: Building: 9 injured 2007: Neurath Power Station Scaffold collapse: Grevenbroich-Neurath, Germany: Power station under construction: 3 dead, 6 injured ...