Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Improving the efficiency of hydropower stations

12.03.2003


Hydroelectric power provides 16 per cent of Europe’s electricity, but most of the plants and their turbines were designed many years ago. By redesigning the runner - the propeller-like component that transfers energy from the water to the drive shaft in the turbine - EUREKA project FLINDT enables operators to harness more power from their turbines.

According to Professor François Avellan, Director of the Swiss main project partner, Laboratoire de Machines Hydrauliques de l’ EPFL, Ecole polytechnique fédérale de Lausanne, the project can also help hydropower stations store power and manage peak demands.

He says, “hydropower stations are managed too conservatively. Small adjustments, within safety parameters, to the runner of the hydraulic machine can dramatically improve the output from existing hydropower plants.”



The challenge the project faced was to understand and predict the complex fluid dynamics within the "draft tube" containing the runner. The draft tube is a key component in hydropower stations as it converts the kinetic energy of the water into pressure energy that can be utilised to drive turbines.

The partners spent thousands of hours investigating the flow in draft tubes using computer models and a scale model. This provided a better understanding of the physics of such flows, allowing the partners to build up an extensive experimental database and enabling the project to avoid undesirable phenomena such as “flow blockage” and other dangerous instabilities when redesigning runners. The knowledge gained can now be applied to improve the output of existing hydropower stations, adding significantly to the European power generation economy.

Water is returned to the river after use. Therefore, in addition to the direct environmental benefits of renewable energy, the project also has indirect benefits: a better understanding of the flow characteristics within the draft tube allows better control of the mixing process in this component, in particular the stresses and the air diffusion, which is of prime importance for the local river life.

The original FLINDT project ran from 1997 to 2000 but the partners agreed to extend the project by two years to carry out further research and are now looking to set up other research projects to investigate safety and reliability issues to push hydroplants to even greater efficiency.

According to Prof. Avellan the project had three major benefits - an increased knowledge about flow through draft tubes, development of the draft flow database and education of the PhD students involved with the project.

"EUREKA’s unique bottom-up approach brought together competitors in a very aggressive market to co-operate in research that benefits all,” he says.

Nicola Vatthauer | alfa
Further information:
http://www.eureka.be/flindt

More articles from Power and Electrical Engineering:

nachricht Researchers take next step toward fusion energy
16.11.2017 | Texas A&M University

nachricht Desert solar to fuel centuries of air travel
16.11.2017 | SolarPACES

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Corporate coworking as a driver of innovation

22.11.2017 | Business and Finance

PPPL scientists deliver new high-resolution diagnostic to national laser facility

22.11.2017 | Physics and Astronomy

Quantum optics allows us to abandon expensive lasers in spectroscopy

22.11.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>