A5016416024- Wind Energy Research and Development
- Energy Load and Power Forecasting
- Meteorological Phenomena and Simulations
- Wind and Air Flow Studies
- Climate variability and models
- Ocean Waves and Remote Sensing
- Oceanographic and Atmospheric Processes
- Tropical and Extratropical Cyclones Research
- Geophysics and Gravity Measurements
- Integrated Energy Systems Optimization
- Computational Physics and Python Applications
- Energy and Environment Impacts
- Social Acceptance of Renewable Energy
- Fluid Dynamics and Vibration Analysis
- Atmospheric and Environmental Gas Dynamics
- Fluid Dynamics and Turbulent Flows
- Solar Radiation and Photovoltaics
- Hybrid Renewable Energy Systems
- Global Energy and Sustainability Research
- Geological and Geophysical Studies
- Maritime Transport Emissions and Efficiency
- Global Energy Security and Policy
- Coastal and Marine Management
- Wind Turbine Control Systems
- Aeolian processes and effects
Technical University of Denmark
2013-2024
Danish Energy Agency
2011-2020
Danish Energy Association
2015-2017
National Institute of Meteorology
2006-2012
Centre for Sustainable Energy
2004-2011
Nordic Laboratory for Luminescence Dating
2006-2007
Roskilde University
2006
University of Reading
2000-2001
Data on the potential generation of energy from wind, solar and biomass is crucial for analysing their development, as it sets limits how much additional capacity feasible to install. This paper presents methodologies used development ENSPRESO, ENergy System Potentials Renewable Energy SOurces, an EU-28 wide, open dataset models renewable potentials, at national regional levels 2010–2050 period. In coherent GIS-based land-restriction scenarios are developed. For resource evaluation also...
Abstract. This is the second of two papers that document creation New European Wind Atlas (NEWA). In Part 1, we described sensitivity experiments and accompanying evaluation done to arrive at final mesoscale model setup used produce wind atlas. this paper, 2, how made atlas product, covering both production climatology generated with Weather Research Forecasting (WRF) microscale Analysis Applications Program (WAsP). The paper includes a detailed description technical practical aspects went...
Abstract The Global Wind Atlas (GWA) provides high-resolution databases and maps of the wind resource for all land points water within 200 km coastline, excluding Antarctica. GWA is used to identify understand global, national, regional, local potential energy guide specialists, policymakers, planners in transition a sustainable system. This information vital ensuring growth energy, helping system, which will mitigate climate change meet world’s need reliable, affordable, clean energy. uses...
Abstract This article gives an overview of the different ways wind resource at a site can be estimated. Eight separate have been identified. Each these will described in some detail, and advantages disadvantages each them discussed. Copyright © 2003 John Wiley & Sons, Ltd.
The growing share of electricity production from solar and mainly wind resources constantly increases the stochastic nature power system. Modelling high renewable energy sources – in particular crucially depends on adequate representation intermittency characteristics resource which is related to accuracy approach converting speed data into values. One main factors contributing uncertainty these conversion methods selection spatial resolution. Although numerical weather prediction models can...
Abstract. We describe the theoretical basis, implementation, and validation of a new parametrisation that accounts for effect large offshore wind farms on atmosphere can be used in mesoscale large-scale atmospheric models. This parametrisation, referred to as Explicit Wake Parametrisation (EWP), uses classical wake theory unresolved expansion. The EWP scheme is validated neutral boundary layer against filtered situ measurements from two meteorological masts situated few kilometres away...
Abstract With the ongoing expansion of wind energy onshore and offshore, large-scale wind-farm-flow effects in a temporally- spatially-heterogeneous atmosphere become increasingly relevant. Mesoscale models equipped with wind-farm parametrization (WFP) can be used to study these effects. Here, we conduct systematic literature review on existing WFPs for mesoscale models, their applications findings. In total, 10 different explicit have been identified. They differ description turbine-induced...
Abstract Extreme winds derived from simulations using mesoscale models are underestimated because of the effective spatial and temporal resolutions. This is reflected in spectral domain as an energy deficit range. The implies smaller moments thus underestimation extreme winds. authors have developed two approaches for correcting smoothing effect resulting model resolution that impacts wind estimation by taking into account difference between modeled measured spectra high-frequency Both give...
Offshore wind farm cluster effects between neighboring farms increase rapidly with the large-scale deployment of offshore turbines. The wakes observed from Synthetic Aperture Radar (SAR) are sometimes visible and atmospheric wake models here shown to convincingly reproduce very long wakes. present study mainly focuses on climatology based Envisat ASAR. available SAR data archive covering large at Horns Rev has been used for geo-located studies. However, results difficult interpret due three...
The decarbonisation of energy sources requires additional investments in renewable technologies, including the installation onshore and offshore wind farms. For to remain competitive, farms must continue provide low-cost power even when covering larger areas. Inside very large farms, winds can decrease considerably from their free-stream values a point where an equilibrium speed is reached. magnitude this primarily dependent on balance between turbine drag force downward momentum influx...
ABSTRACT The Finnish Wind Atlas was prepared applying the mesoscale model AROME with 2.5 km horizontal resolution and diagnostic downscaling method Analysis Application Programme (WAsP) 250 m resolution. latter applied for areas most favourable wind power production: a 30 wide coastal/offshore zone, highlands, large lakes fields. methodology included several novel aspects: (i) climatologically representative period of real 48 months during 1989–2007 simulated model; (ii) in addition,...
Abstract This paper demonstrates that a statistical–dynamical method can be used to accurately estimate the wind climate at farm site. In particular, postprocessing of mesoscale model output allows an efficient calculation local required for resource estimation turbine The is divided into two parts: 1) preprocessing, in which configurations simulations are determined, and 2) postprocessing, data from prepared energy application. Results idealized modeling experiments challenging site...
Offshore wind farm wakes were observed and photographed in foggy conditions at Horns Rev 2 on 25 January 2016 12:45 UTC. These new images show highly contrasting regarding the speed, turbulence intensity, atmospheric stability, weather wake development as compared to 1 photographs from 12 February 2008. The paper examines satellite images, radiosondes, lidar turbine data compares observations results meso-scale modelling large eddy simulation. Key findings are that a humid warm air mass was...
Abstract. Wind farm parameterizations (WFPs) are used in mesoscale models for predicting wind power production and its impact on resources while considering the variability of regional climate. However, performance WFPs is influenced by various factors including atmospheric stability. In this study, we compared two widely Weather Research Forecasting (WRF) model to large-eddy simulations (LES) turbine wakes performed with same model. The Fitch WFP explicit wake parameterization were...
Abstract The paper presents research to develop a model complex that takes into account the interaction between wind farm and atmosphere, closely spaced farms. Six models have been reviewed developed/adapted for use in modelling, covering scales from several hundred kilometres down size of individual turbine. Flow within farms is difficult predict. analytical modified WAsP/park show promise; however, these require further development/evaluation. For flow downwind farm, intermediate‐scale fit...
In this paper a simple 2D linear quasigeostrophic model is used to investigate how the development of local confined cyclonic perturbations dependent on perturbation scale, location, and tilt in Eady-type basic states. It found that initial growth can be maximized by reducing both vertical horizontal scale using “midtropospheric” location. “Potential vorticity (PV) thinking” suggests concept “PV unshielding” explain result. Adding meridional gradient basic-state PV lowers location optimally...
Simulations, from mesoscale numerical models, and analyses of in-situ remote sensing data offshore wind farms in Denmark, are used to examine both horizontal vertical gradients speeds the coastal zone. Results suggest that distance coastline over which speed profiles not at equilibrium with sea surface (which defines zone) extends 20 km possibly 70 coast. Using this operational definition zone, these results thus imply typical width zone northern Europe is between km. The wind's (shear)...
Abstract High-resolution wind fields retrieved from satellite synthetic aperture radar (SAR) imagery are combined for mapping of resources offshore where site measurements costly and sparse. A new sampling strategy the SAR scenes is introduced, based on a method statistical–dynamical downscaling large-scale conditions using set classes that describe representative situations. One or more then selected to represent each class weighted according their frequency occurrence. The methodology was...
Abstract The increase in the number of installed offshore wind farms has led to clustering, where farm interaction can cause energy losses. Danish government is planning an Energy Island North Sea consisting ten 1 GW farms. initial layout design from a consultant company (COWI) reported 5% annual production (AEP) wake loss based on low-fidelity engineering model that known underestimate interaction. present work employs higher-fidelity models Reynolds-averaged Navier-Stokes (RANS) and...
Meteorological ensemble forecasts aim at quantifying the uncertainty of future development weather by supplying several possible scenarios this development. Here we address use such in probabilistic forecasting wind power production. Specifically, for each forecast horizon quantiles production conditional on information available time which is generated. This involves: (i) transformation meteorological into and (ii) calculation based forecasts. Given measurements production, representing a...
ABSTRACT A selective dynamical downscaling method is developed to obtain extreme‐wind atlases for large areas. The general, efficient and flexible. consists of three steps: (i) identifying storm episodes a particular area, (ii) the storms using mesoscale modelling (iii) post‐processing. post‐processing generalizes winds from standard conditions, i.e. 10‐m height over homogeneous surface with roughness length 5 cm. generalized are then used calculate 50‐year wind annual maximum each grid...
Abstract. Understanding uncertainties in wind resource assessment associated with the use of output from numerical weather prediction (NWP) models is important for energy applications. A better understanding sources error reduces risk and lowers costs. Here, an intercomparison 25 NWP presented three sites northern Europe characterized by simple terrain. The are evaluated using a number statistical properties relevant to verified observations. On average have small speed biases offshore aloft...