Development of High Specific Speed Pump-Turbinesby R. Thalmann, Vevey Engineering Works Ltd, Switzerland,
M. C. Michon, Vevey Engineering Works Ltd, Switzerland,
Abstract: The operational range of pump-turbines is continually increasing, especially in the direction of high specific speed installation. In this context, high specific speed refers to units operating under heads of less than 170 feet or those which until now would have been equipped with an adjustable blade pump-turbine. Today Francis type pump-turbines are being used in this operating range. Vevey has carried out development work on such machines in its Hydraulic Research Department. This paper discusses the testing, which involved pump-turbines from Valparaiso, Spain and from R.B. Russell Dam in the U.S.
Subject Headings: Hydraulics | Pumps | Pumping stations | Dams | Hydro power | Turbines | Pumping tests | Spain | Europe
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