Experience with Large Francis Rehabilitation Projects

摘要

This paper presents the experience with some of these large projects where such improvements have been designed with CFD support, model tested and implemented on the full scale units, including the 2 different designs for the 10 x 770 MW Guri 2 plant, and the 353 MW Ruacana plant. Also, the Inga 2 case a hydraulic design & performance comparison between the old and rehab units will be provided, as the original design from the former Sulzer-Escher Wyss (now Andritz Hydro) has recently been upgraded. An outlook to the Inga 3 upcoming project is provided. Through the paper, limiting factors will be discussed, including CFD applications as well as methods for verification of mechanical integrity.