Search results
Results from the WOW.Com Content Network
The Francis turbine is a type of water turbine. ... (330–980 ft). [2] Penstock diameters are between 1 and 10 m (3.3 and 32.8 ft).
A fifth turbine-generator, horizontal Francis-type, originally rated at 5 MW, was added to Plant 1 in 1905. [12] In 1908 Seattle-Tacoma Power Company, a forerunner to Puget Sound Energy, purchased Seattle Electric Company. [10] A second penstock was added to Plant 2 in 1957. The penstock was supplied and installed by Chicago Bridge & Iron Co.
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.
To connect the reservoir and power plant, there is a 9 ft (2.7 m) diameter, 4.46 mi (7.18 km) long penstock which starts at the intake, located on the northwest corner of the lake. [3] From the intake, water rushes down the penstock where it reaches two 23.5 MW Francis turbine-generators. Water used by the power plant is then discharged into ...
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 in power by 90%. In 1855, Francis published these findings in the "Lowell Hydraulic Experiments". [8]
The two penstock pipe lines are designed to carry a discharge of 17.88 cubic metres (631 cu ft) per second. The power station located at Panniyar is provided with installation of 30 MW comprising two units, each of 15 MW capacity Francis turbines. The firm power generation is 17 MW and the annual power generated is 158 GWh.
The penstocks are 102 metres (335 ft) long and 4.6 metres (15 ft) in diameter. The water is used to turn five Vertical Francis turbines, revolving at a higher speed of 187 rpm. The generators at Maraetai II produce 36 MW each at 11,000 volts.
The second plant is underground and has a single 100 MW Francis turbine supplied by Andritz. However, the plant is designed to accommodate an additional 40 MW in the future. The water, which comes from the same reservoir as for the historical power plant, flows through a 370 m long intake tunnel and then drops 110 m into the penstock.