Pump turbines in existing power plants

 

Norway has 50% of Europe’s hydropower reservoir capacity. Much of this capacity is in relation to reservoirs and/or large lakes on both sides of an existing power plant. This project will develop new technology for retrofitting reversible pump turbines in existing power plants.

NVE has found that there are 86 power plants which currently has installed more than 20MW and has a lower reservoir that is either lake or regulated reservoir (NVE rapport: “Pumpekraft I Noreg”, 2011) .

Currently, 10800MW of conventional hydropower is installed at these locations. Many of these locations (and more) are candidates for installation of pumped storage power capabilities, which would drastically increase the total installed power at these locations and in the energy system.

Using existing infrastructure and expanding the powerhouse caverns horizontally whit several more units would be a cost effective way of doing this. However, pumping requires a bigger submergence than conventional hydropower and for this reason; the existing power plant cannot be used for such an expansion because they will be insufficiently submerged to avoid cavitation because the pressure becomes too low. '

Task 2.3 will develop a new booster pump technology for providing the necessary pressure increase, so that all existing power plant infrastructure can be reused for an expansion with pumping capabilities. This would give large cost savings, possibly shifting the installation of pumping capabilities from a bad to a good investment.

At the same time, the current state-of-the-art Reversible Pump Turbines (RPT) are equipped with variable speed capabilities due to increased efficiency and control of the pumping power. This technology is expensive and requires a lot of space. The new booster pump technology will make possible all the hydraulic benefits of using variable speed technology, without having to install variable speed technology.

Conference Proceedings 2019

Tengs, Erik Os; Einzinger, Johannes; Storli, Pål-Tore Selbo. 
Two-way coupled simulation of the Francis-99 hydrofoil using model order reduction. Journal of Physics, Conference Series 2019 ;Volum 1296. s. -
NTNU 

Tengs, Erik Os; Fevåg, Live Salvesen; Storli, Pål-Tore Selbo. 
Francis-99: Coupled simulation of the resonance effects in runner channels. Journal of Physics, Conference Series 2019 ;Volum 1296. s. -
NTNU 

Publications 2018

Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. Simulation and Discussion of Models for Hydraulic Francis Turbine Simulations. IFAC-PapersOnLine 2018 ;Volum 51.(2) s. 109-114. NTNU 

Conference Proceedings 2018

Storli, Pål-Tore Selbo. Simulation and Discussion of Models for Hydraulic Francis Turbine Simulations. MathMod 2018; 2018-02-20 - 2018-02-23
NTNU

Contact

About the project

Full project title: Pump turbines in existing power plants

Duration: 2017-2021

Objective: New technology for retrofitting reversible pump turbines in existing power plants.

R&D Partners: Sira-Kvina kraftselskap, Rainpower. TU Berlin. 

Researchers working on the project: Arne Nysveen, Pål-Tore Storli.

PhD working on the project: Helene Dagsvik.

Master students associated with the project: Kristin Torød, John Valstad, Pål Dahle, Rune Haugen Larsen, Ingrid Befring Hage, Jan-Karl Lasse Escher, Ole Erik Holthe Leangen.