Research for the upgrade of a Kaplan turbine at Krippau, Austria, and operational experience

  • H. Benigni and H. Jaberg, Institute of Hydraulic Fluid Machinery, Graz University of Technology, Austria M. Becker, T. Krappel and L. Juhrig, Stellba Hydro GmbH & Co KG, Austria J. Schiffer-Rosenberger, Jaberg & Partner GmbH, Austria G. Penninger, M.Artmann, and C. Weichselbraun, Verbund Hydro Power GmbH, Austria
  • Vol. 27 - Issue 6, 2020

The refurbishment of the Krippau run-of-river hydropower plant increased the efficiency in the relevant operating range of the turbine through a 4.1 m diameter runner replacement. The maximum discharge was increased from 120 to 135 m³/s and annual production by 4 per cent. Extensive numerical investigations were carried out to calculate the risk of cavitation of the turbine configuration as this risk would be the limiting factor for further upgrades.

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Research for the upgrade of a Kaplan turbine at Krippau, Austria, and operational experience
  • Vol. 27 - Issue 6, 2020

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