Heidenheim, Germany Voith Hydro Norway and Glomma Kraftproduksjon AS have signed a contract for the supply and installation of six new units for the Raanaasfoss hydropower project. The contract award is the largest contract ever for Voith Hydro in Norway, with a total value of about 53 million euros (US$68.66 million).
Voith Hydro started 32 months ago performing a study to evaluate different upgrading possibilities for the old Raanaasfoss power plant, built in 1922. “We presented seven different alternatives to the customer, who, after detailed investigations, calculations and risk analyses, decided to go for completely new vertical propeller turbines placed on top of the existing draft tubes,” said Dr. Gerhard Blaschitz, chief executive officer of Voith Hydro Norway. “It is the best solution to minimize impacts on the waterway and the existing civil structures. No additional coffer dam will be needed. And it is the best option regarding civil cost, too.”
The signed contract marks the entry into phase two of an existing Frame & Partnership Agreement. In the first contract phase, Voith Hydro performed development and analysis works, including CFD-studies, model tests and optimization of the unit configuration for the modernization of Raanaasfoss. “We are proud to have achieved very good results of the model test. They even exceeded our client’s expectations”, said Blaschitz.
In phase two of the project, Voith Hydro will supply and install the complete electromechanical powerhouse equipment. The scope of supply includes six vertical propeller turbines with a maximal output of 15.5 megawatts each and the related generators, excitation, high voltage equipment, switchgear and control equipment. Furthermore, the powerhouse crane is part of the supply scope as well as other electrical and mechanical Balance of Plant equipment. Commissioning of the first unit is scheduled for December 2012; the last unit will follow in spring 2016.