Seite - 1384 - in Book of Full Papers - Symposium Hydro Engineering

9. ENERGY PRODUCTION VALUATION The following chart outlines the results of a comparative study undertaken on the outflows at Gaissulz on Ybbs, taking different heads into account. The key result, in relation to the percentage increase in energy production is, that relative output remains constant. Fig. 27 The duration curve for hydraulic performance is shown in above diagram for different net head with a fixed turbine flow of 20 m³/s [3] The values for increase of yearly energy production in percentage terms, measured against a fixed full load flow are thus more or less constant and amount to 7% for full load conditions and 3% for the annual average. 1384