Author(s): Josef Schneider; Franz-Georg Pikl; Hannes Badura

Linked Author(s): Josef Schneider, hannes badura

Keywords: Physical model test; Run-of-river hydropower plant; New design

Abstract: VERBUND Hydro Power GmbH and Salzburg AG are planning to build a new run-of-river power plant on the River Salzach in Austria. With a flow rate of 203 m3/s, the plant is characterized by a head of approx. 8.14 m, a capacity of 14.5 MW and the standard energy capacity of around 72 Gwh. The planned hydropower plant consists of a weir system on the left bank with two weir fields that can be closed with radial segments and attached flaps. The power house, located on the right bank, is equipped with two identical machine sets with horizontal axes. The two turbine fields are dammed by flaps and are designed to be overflown to ensure sufficient and safe flood discharge. This power plant has some special features. Due to the horizontal installation of the vertical Kaplan turbine and the necessary horizontal rake, a very well-functioning bedload barrier is necessary in the upstream reach. The reservoir has been reduced to a minimum due to ecological requirements. It is limited by a special ramp upstream of the power station. In addition to the two classic weir fields, the flood discharge also takes place via the turbine fields. The dividing wall in the underwater is not carried out solid, but as a through-through component for the turbine water, which, however, must prevent the sediment deposits in the turbine outlet in the event of a flood. In a hydraulic full model on a scale of 1:40 the Stegenwald power plant with the weir system and the power house is examined and hydraulically optimized at the Institute for Hydraulic Engineering and Water Management at Graz University of Technology. The final results of these tests will be shown at the congress.

DOI: https://doi.org/10.3850/IAHR-39WC2521711920221783

Year: 2022