| Popis: |
The Nantahala plant of the Nantahala Power and Light Company is located near Franklin, N. C., and was designed by the Aluminum Company of America. The 60,000-hp hydraulic turbine operates under 925 ft rated net head at 450 rpm. The static head on the plant of 1008 ft is the highest for any reaction-type turbine installed in the United States. The design and construction of this turbine and butterfly valve are described, followed by results of the field tests. Operation and maintenance work undertaken since the unit was installed are frankly discussed. The field tests showed an efficiency of 93.7 per cent. Considerable stainless steel was used in the original installation and its use has been greatly extended since the unit was placed in operation. |
