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Siphon Penstock?An Economic Way to Develop Hydros

by Ashok K. Rajpal, Mead & Hunt Inc. Madison, WI, USA,
Patrick D. Colgan, Mead & Hunt Inc. Madison, WI, USA,



Document Type: Proceeding Paper

Part of: Waterpower '85

Abstract:

As part of the 48 MW Jim Falls Hydro Redevelopment Project by Northern States Power Company, a minimum flow powerhouse was constructed with a siphon penstock. The Minimum Flow Unit (MFU) is designed for a constant discharge of 240 cfs (6. 82 m**3/s). The gross head is 31. 4 feet (9. 6 m). Generation will be 500 KW. The siphon will lift the water 5 feet (1. 5 m) in a 78-inch (1. 98 m) diameter steel penstock. This paper describes the general arrangement of the intake and penstock and the comparative cost of the alternatives considered.

Subject Headings: Conduits | Water intakes | Hydro power | Power plants | Economic factors | Water pipelines | Water flow

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