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Observations and Experiences of Bulb Turbines

by Sven R. Alfredson, VBB, Stockholm, Sweden,



Document Type: Proceeding Paper

Part of: Waterpower '85

Abstract:

This article gives a short historical review of the introduction, construction and development of bulb turbine plants in Sweden. The article relates some of the experiences of the designers, manufacturers, erectors and operating staff at the plants. The experiences are described as special incidents, more common problems and steps taken to avoid repetition. A brief description is given of the plant Avesta-Lillfors which, with its two geared bulb units of 12. 6 MW each, is of special interest. The units are probably - as far as is known - the biggest geared bulb units at present in operation in the world. The statistics of the availability of the bulb units reveal good figures. After an initial period of early defects lasting some years the units seem to have been fully advanced and several have attained an availability exceeding 99%.

Subject Headings: Turbines | Statistics | Construction management | Industrial facilities | Hydro power | Hydraulics | Defects and imperfections | Sweden | Europe

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