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
Scientists print sensors on gummi candy: creating microelectrode arrays on soft materials
21.06.2018 | Technische Universität München
Electron sandwich doubles thermoelectric performance
20.06.2018 | Hokkaido University
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
22.06.2018 | Materials Sciences
22.06.2018 | Earth Sciences
22.06.2018 | Life Sciences