ANDRITZ to Rehabilitate Kaplan Turbines of Ryburg-Schwörstadt Hydropower Plant in Switzerland

The aim of this rehabilitation project is to ensure the service life and operating safety until the end of the concession as well as to make environmental improvements by installing oil-free bearing systems on wicket gates and oil-free hubs for the new runners. The units will be renovated one after the other between 2023 and 2027. With annual average energy production of about 760 GWh, Ryburg-Schwörstadt generates clean energy from hydropower, thus contributing towards a sustainable and emission-free future.

The ANDRITZ scope of supply and services for the hydro-mechanical overhaul of the four Kaplan turbines, including hydraulic turbine governors, comprises design, engineering, manufacture of new parts, factory overhaul, transport, erection, testing, and commissioning. Especially worth mentioning are the homologous model testing and the supply of four new Kaplan runners with oil-free hubs – the first ever in Switzerland.

The work will be performed by the ANDRITZ location in Kriens, Switzerland, as the contractor responsible for overall project management, logistics and transport, engineering, erection, and commissioning. Model testing and runner design will be carried out at the ANDRITZ location in Tampere, Finland, and manufacture of the new Kaplan runners and factory overhaul of the large turbine components will be conducted at the ANDRITZ manufacturing facility in Ravensburg, Germany.

ANDRITZ is proud to be part of this rehabilitation project. Today, about 90% of all turbines installed in Switzerland were originally installed or refurbished by ANDRITZ or its predecessor companies. ANDRITZ is committed to its customers serving the Swiss hydropower market across the entire ANDRITZ product and service portfolio.