Pit Turbine Technology for Low Head Hydro Projects

by Robert D. Steele, Voith Hydro Inc, York, PA, USA,

Document Type: Proceeding Paper

Part of: Water Power '87


Manufacturers of hydro generating equipment have developed designs that are adaptable to existing dams and suitable for upgrading and redevelopment of existing hydro plants. The pit turbine design addresses the need for the economy of site construction, and the mechanical hardware associated with this design is presenting new challenges to the manufacturers. The Murray Project developed for the city of North Little Rock, Arkansas, is a low head site using the existing dam constructed for navigation and flood control by the U. S. Army Corps of Engineers (Arkansas River Lock and Dam #7). This two (2) unit project is developed at 17 feet (5. 3 M) head for 40 MW output. When completed this turbine will be one of the largest Kaplan turbines and the largest pit turbine existing in the United States. This paper describes the mechanical features of this pit turbine and it speed increaser and generator.

Subject Headings: Construction sites | Locks (dam) | Turbines | Head (fluid mechanics) | Existing buildings | Earthfill dams | Weirs | Hydraulic design | Arkansas | United States

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