A5038578633- Wind Energy Research and Development
- Meteorological Phenomena and Simulations
- Climate variability and models
- Wind and Air Flow Studies
- Energy Load and Power Forecasting
- Tropical and Extratropical Cyclones Research
- Atmospheric and Environmental Gas Dynamics
- Oceanographic and Atmospheric Processes
- Integrated Energy Systems Optimization
- Ocean Waves and Remote Sensing
- Social Acceptance of Renewable Energy
- Geophysics and Gravity Measurements
- Icing and De-icing Technologies
- demographic modeling and climate adaptation
- Cryospheric studies and observations
- Aeolian processes and effects
- Atmospheric aerosols and clouds
- Electric Power System Optimization
- Noise Effects and Management
- Fluid Dynamics and Turbulent Flows
- Vehicle Noise and Vibration Control
- Global Energy and Sustainability Research
- Arctic and Antarctic ice dynamics
- Plant Water Relations and Carbon Dynamics
- Fluid Dynamics and Vibration Analysis
Technical University of Denmark
2015-2024
Danish Energy Association
2017
National Institute of Meteorology
2010-2011
Centre for Sustainable Energy
2010-2011
NSF National Center for Atmospheric Research
2008-2010
University of Arizona
1996-2003
University of Utah
1989-1994
High-quality tall mast and wind lidar measurements over the North Baltic Seas are used to validate climatology produced from winds simulated by Weather, Research Forecasting (WRF) model in analysis mode. Biases annual mean speed between observations at heights around 100 m smaller than 3.2% offshore sites, except for those that affected wake of a farm or coastline. These biases obtained using directly reanalysis. We study sensitivity WRF-simulated various setup parameters. The results...
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 Outgoing longwave radiation (OLR) is used to describe the annual cycle of convection that resides over Amazon Basin during austral summer and Central America adjacent waters Pacific winter. The preferred locations convective activity wet season in respective hemispheres are determined, beginning ending these seasons specified. onset Amazonia usually occurs within a single month, while typically requires from one three months. this regime shown exhibit seasonal regularity degree...
ABSTRACT The existence of vertical wind shear in the atmosphere close to ground requires that resource assessment and prediction with numerical weather (NWP) models use forecasts at levels within full rotor span modern large turbines. performance NWP regarding energy these partly depends on formulation implementation planetary boundary layer (PBL) parameterizations models. This study evaluates speeds shears simulated by Weather Research Forecasting model using seven sets simulations...
Abstract. This is the first of two papers that document creation New European Wind Atlas (NEWA). It describes sensitivity analysis and evaluation procedures formed basis for choosing final setup mesoscale model simulations wind atlas. The suitable combination parameterizations, bound by practical constraints, was found simulating climatology field at turbine-relevant heights with Weather Research Forecasting (WRF) model. Initial WRF experiments compared climate generated using commonly used...
The increasing size of wind turbines, with rotors already spanning more than 150 m diameter and hub heights above 100 m, requires proper modeling the atmospheric boundary layer ( ABL ) from surface to free atmosphere. Furthermore, large farm arrays create their own structure unique physics. This poses significant challenges traditional engineering models that rely on surface‐layer theories simulate flow in around farms. However, adopting an approach offers opportunity better integrate design...
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...
Operational since 2004, the National Centre for Wind Turbines at Høvsøre, Denmark has become a reference research site wind-power meteorology. In this study, we review site, its instrumentation, observations, and main programs. The programs comprise activities on, inter alia, remote sensing, where measurements from lidars have been compared extensively with those traditional instrumentation on masts. addition, regard to meteorology, wind-resource methodologies wind climate extrapolation...
This paper presents a validation of atmospheric reanalysis data sets for simulating onshore wind generation time series large-scale energy system studies. The three reanalyses are the ERA5, New European Wind Atlas (NEWA) and DTU’s previous European-level (EIWR). An optional scaling is applied to match microscale mean speeds reported in Global version 2 (GWA2). speed used account effects terrain on distributions. power fleet 2015–2018 simulated, with commissioning new plants (WPPs) considered...
A multiyear simulation of the global climate uses a revised version National Center for Atmospheric Research (NCAR) Community Climate Model Version 2 (CCM2) coupled to Biosphere–Atmosphere Transfer Scheme (BATS). It is compared with and rain gauge precipitation climatologies evaluate fields European Centre Medium-Range Forecasts analyses atmospheric circulation. The near-surface data from Amazonian field campaigns. model South American agrees closely observational record much improved past...
The strength of the coupling between land and atmosphere, which controls, for example, degree to precipitation-induced soil moisture anomalies affect overlying atmosphere thereby subsequent generation precipitation, has been examined quantified with many atmospheric general circulation models (AGCMs). Generally missing from such studies, however, is an indication extent simulated model dependent. Four modeling groups have recently performed a highly controlled numerical experiment that...
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...
Downscaling simulations performed with the Weather Research and Forecasting (WRF) model were used to determine large-scale wind energy potential of Iceland. Local speed distributions are represented by Weibull statistics. The shape parameter across Iceland varies between 1.2 3.6, lowest values indicative near-exponential at sheltered locations, highest normal exposed locations in winter. Compared summer, average power density winter is increased throughout a factor 2.0–5.5. In any season,...
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 Ocean wind retrievals from satellite sensors are typically performed for the standard level of 10 m. This restricts their full exploitation energy planning, which requires information at much higher levels where turbines operate. A new method is presented vertical extrapolation satellite-based maps. Winds near sea surface obtained data and used together with an adaptation Monin–Obukhov similarity theory to estimate speed levels. The thermal stratification atmosphere taken into...
Abstract. The wake of a single wind turbine in complex terrain is analysed using measurements from lidars. A particular focus this analysis the deficit and propagation. Six scanning lidars (three short-range three long-range WindScanners) were deployed during Perdigão 2015 measurement campaign, which took place at double-ridge site Portugal. Several scenarios, including triple- dual-Doppler scans, designed to capture 2 MW located on one ridges. Different displacements are categorized...
Abstract High-resolution simulations are conducted with the Weather Research and Forecasting Model to evaluate sensitivity of wake effects power production from two wind farm parameterizations [the commonly used Fitch scheme more recently developed Explicit Wake Parameterization (EWP)] resolution at which model is applied. The for a 9-month period domain encompassing much U.S. Midwest. horizontal resolutions considered 4 km × 2 grid cells, vertical discretizations employ either 41 or 57...
Abstract. We explore the changes in wind energy resources northern Europe using output from historical to mid-21st century CMIP6 simulations and high-emission SSP5-8.5 scenario. This study improves upon many assumptions made past. First, we interpolate winds hub height model-level raw data; second, use a large ensemble of models; third, consider possible wake effects on annual production farm cluster proposed for North Sea. The common practice extrapolating 10 m speeds turbine power law with...
Accurate wind resource assessments are necessary for cost effective offshore energy developments. The field depends on the sea state. In coastal areas, where farms usually built today, and waves often not in full balance. addition, modify their surrounding turbulence field, especially downwind. These farm wakes, turn, interact with wave creating a complex dynamical system. To fully capture dynamics such system realistic way, coupled atmosphere-wave modelling equipped parameterization should...
Renewable electricity generation will need to be rapidly scaled address climate change and other environmental challenges. Doing so effectively require an understanding of resource availability. We review estimates for renewable the global technical potential, defined as amount that could produced with current technologies when accounting geographical limitations well conversion efficiencies; economic which also includes cost; feasible accounts societal constraints. consider utility-scale...