Lufteintragsrate in Drucksysteme von Wasserkraftanlagen infolge Einlaufwirbel
Prof. Dr. R. Boes,
Laboratory of Hydraulics, Hydrology and Glaciology VAW, ETH Zurich
Summary
Air in pressure systems of hydroelectric power plants has in general negative consequences such as e.g. reductions in turbine efficiency, pulsations, pressure surges and reductions in flow rates. Vortices at intakes are a major source of air entrainment. Their air entrainment rate is unknown, with the result that so far generous reserves are observed during planning and operation of hydroelectric power plants to avoid intake vortices. Knowing the air entrainment rate allows the design of counter-measures such as deaeration systems and can therefore improve the efficiency of a hydroelectric power plant, especially with regard to storage management. The aim of the project is to bridge the relevant gaps in knowledge and in practical design basis of intake structures to improve the operation of hydroelectric power plants. It is therefore intended to generate vortices in a large-scale model and to measure and analyze the resulting air entrainment rate into the pressure system.
Project start
October 2009
Partner
Swiss Federal Office of Energy,
Pöyry Energy AG
