A5005252189- Wind Energy Research and Development
- Wind and Air Flow Studies
- Meteorological Phenomena and Simulations
- Fluid Dynamics and Vibration Analysis
- Ocean Waves and Remote Sensing
- Energy Load and Power Forecasting
- Wind Turbine Control Systems
- demographic modeling and climate adaptation
- Atmospheric aerosols and clouds
- Climate variability and models
- Geophysics and Gravity Measurements
- Insurance, Mortality, Demography, Risk Management
- Wave and Wind Energy Systems
- Simulation Techniques and Applications
- Hungarian Social, Economic and Educational Studies
Karlsruhe Institute of Technology
2016-2022
Garmisch-Partenkirchen Medical Center
2016-2020
Institute for Food and Environmental Research
2019-2020
Universität Innsbruck
2016
More than 12 GW of offshore wind turbines are currently in operation European waters. To optimise the use marine areas, farms typically clustered units several hundred turbines. Understanding wakes farms, which is region momentum and energy deficit downwind, important for optimising farm layouts to minimize costs. While most weather situations (unstable atmospheric stratification), only a local effect within farm, satellite imagery reveals wind-farm be tens kilometres length under certain...
Abstract We present an analysis of wind measurements from a series airborne campaigns conducted to sample the wakes two North Sea farm clusters, with aim determining dependence downstream speed recovery on atmospheric stability. The consequences stability wake length expected annual energy yield farms in are assessed by engineering model. Wakes found extend for significantly longer distances (>50 km) stable conditions than neutral and unstable ( 15 km). parameters one common model...
Abstract. Wind farms affect local weather and microclimates; hence, parameterizations of their effects have been developed for numerical prediction models. While most wind farm (WFPs) include drag farms, models differ on whether or not an additional turbulent kinetic energy (TKE) source should be included in these to simulate the impact boundary layer. Therefore, we use aircraft measurements above large offshore stable conditions evaluate WFP choices. Of three case studies examine, find...
In Europe, offshore wind farms have a capacity of 16 GW, with 71% installed at the North Sea. These represent an additional source turbulence and may influence stratification marine boundary layer. We present aircraft measurements simulations showing impact on temperature humidity hub height in order 0.5 K g kg−1 even 60 km downwind farm cluster. extend these to explore realistic future scenario, suggesting wakes potential water vapor propagating more than 100 downwind. Such impacts are only...
This publication synthesizes the results of WIPAFF (WInd PArk Far Fields) project. focused on far field large offshore wind park wakes (more than 5 km downstream parks) located in German North Sea. The research project combined situ aircraft and remote sensing measurements, satellite SAR data analysis model simulations to enable a holistic coverage wakes. measurements recorded on-board DO-128 by laser scanner prove that more 50 kilometers exist under certain atmospheric conditions....
Large offshore wind farms are usually clustered around transmission grids to minimize the expense of transmission and due space military zones, pipelines constrains other uses such as nature preserves. However, this close proximity can undermine power production in downwind due to wakes from upwind farms. Therefore, energy industry has great interest determining the spatial dimensions of farm assess economical potential planned In this work we use wake measurements conducted by a...
Abstract. Between 6 September 2016 and 15 October 2017, meteorological measurement flights were conducted above the German Bight in framework of project WIPAFF (Wind Park Far Field). The scope measurements was to study long-range wakes with an extent larger than 10 km behind entire wind parks, investigate interaction parks marine atmospheric boundary layer. research aircraft Dornier 128 Technische Universität (TU) Braunschweig performed total 41 during different seasons stability conditions....
Offshore meteorological characteristics set specific conditions for the operation of offshore wind farms. One feature is low turbulence intensity which on one hand reduces loads turbines but other reason much longer turbine and farm wakes than over land. The German Government presently funding a research project called WIPAFF (Wind PArk Far Field) heads analysis properties impacts park far fields. focus wakes, their interaction among each regional climate impact. This done by in-situ,...
Abstract The recovery of offshore wind farm wakes in the German Bight was analyzed by a unique situ data set, measured on‐board research aircraft Dornier Do‐128 during WIPAFF project 2016 and 2017. These observations were used to validate simple analytical wake model five case studies. observed rates compared with results mesoscale Weather Research Forecasting (WRF) model. airborne show that can be described an exponential function as expected strengthens hypothesis vertical downward moment...
Abstract. Between 6 September 2016 and 15 October 2017, meteorological measurement flights were conducted above the German Bight in framework of project WIPAFF (Wind Park Far Field). The scope measurements was to investigate long-range wakes with extent larger than 10 km behind entire wind parks, interaction parks marine atmospheric boundary layer. research aircraft Dornier 128 TU Braunschweig performed total 41 during different seasons stability conditions. instrumentation consisted a nose...
Abstract On 1 February 2014, the southern side of Alps was affected by a severe snowstorm that forced authorities to issue highest level avalanche danger in parts Austria. The northern mostly dry. Nevertheless, radar imagery captured evolution quasi-steady convective cloud bands over Alpine foreland with remarkable length up 300 km. This study illuminates processes generated these based on numerical simulations. storm associated deep large-scale trough caused strong southwesterly...
Abstract. Because wind farms affect local weather and microclimates, parameterizations of their effects have been developed for numerical prediction models. While most farm (WFP) include drag farms, models differ on whether or not an additional turbulent kinetic energy (TKE) source should be included in these to simulate the impact boundary layer. Therefore, we use aircraft measurements above large offshore stable conditions evaluate WFP choices. Of three case studies examine, find simulated...
For wind energy, the knowledge of available resource is essential. Therefore, specific phenomena at altitude range turbines are currently focus investigations. One such feature low-level jet (LLJ). The article analyses LLJ properties two locations in German Bight: A lidar system for measuring profiles heights from 50 m to 500 a.g.l. (above ground level) was first installed offshore island Heligoland, Germany, and then coastal Norderney, one year. defined here as a maximum horizontal speed...
<p>Wind farm far wakes are of particular interest for offshore installations, as turbulence intensity, which is the main driver wake dissipation, much lower over ocean than land. Therefore, behind wind turbines and parks expected to be longer onshore parks. </p><p>In situ measurements were missing before initiation research project WIPAFF (WInd PArk Far Fields) in 2015. The results reported here. has been funded by German Federal...