Experience has shown that the accurate power generation estimation based on wind speed is a challenging task. For large new turbine models, conventional met mast wind speed measurements are not feasible based on cost and technical considerations. Researchers at the Endowed Chair of Wind Energy (SWE) of the University of Stuttgart are working together with researchers from the University of Oldenburg and other project partners on an alternative remote sensing technique.
LIDAR technology (Light Detection and Ranging) is being developed and tested for wind energy applications. This laser-based measurement technique performs wind field measurements in a more flexible and economical way. Currently, LIDAR is the best candidate to replace the met mast based wind measurements, used in power curve calculations, for offshore wind farms.
LIDAR systems detect wind speed and direction based on the time delay of the laser beam reflected by airborne aerosols. This technology has been used for decades, mainly for atmospheric research. In the last years the wind energy industry has seen the advantages of this technology for wind field measurements. The present research project aims to further develop LIDAR technology for wind energy applications. The objective is to establish this measurement technique as a quality standard for wind field measurements with the spatial and temporal resolution needed by the wind energy industry.
The research concentrates on two main topics, namely, power curve assessment and wind field measurement from the nacelle. The first deals with ground-based approaches to replace conventional anemometers mounted on a met mast. The second aims at the development and verification of new nacelle-based approaches to measure inflow and wake wind fields. Control strategies and far wake models are also developed and tested with the measurements.
The SWE coordinates a group of partners which are evaluating a commercial LIDAR system supplied by Leosphere®. The research center ForWind at the University of Oldenburg will work on new methods for unsteady power curve estimation. The German Aerospace Center (DLR) brings in experience using LIDARs for atmospheric research and airplane wakes. Power curve measurements are performed on an onshore five megawatt (5MW) prototype wind turbine belonging to Multibrid GmbH in Bremerhaven. At this site, SWE carries out measurements on a 102m metmast. The German Wind Energy Institute (DEWI) supplies its experience on standardized power curve measurements. They also support offshore measurements conducted at the research platform FINO1 in the North Sea (www.fino-offshore.de). Finally, the Federation of German Wind Power (FGW) supports the creation of standards to be used by the wind energy industry.
The results of this project supported by the German Federal Environment Ministry will be made available to the entire wind energy community. Moreover, it provides essential input for a scientific support program for the German offshore test site “Alpha Ventus”. This offshore wind farm, located 45 kilometres north of the island of Borkum, is planned to begin operation in autumn 2008 (www.rave-offshore.de).
Birgit Vennemann | alfa
How protons move through a fuel cell
22.06.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt
Fraunhofer IZFP acquires lucrative EU project for increasing nuclear power plant safety
21.06.2017 | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
23.06.2017 | Physics and Astronomy
23.06.2017 | Physics and Astronomy
23.06.2017 | Information Technology