Publication
Wind farm density and harvested power in very large wind farms: A low-order model
Publications associées (34)
Towards an improved understanding of wind turbine wakes in complex terrain
In this thesis, we explored the effect of certain terrain-induced flow phenomena on the development of wind turbines sited in complex terrain. A combined experimental and analytical approach is used to study wind turbine wakes in different types of complex ...
EPFL2024Wind Turbine Wakes in Active Yaw Control: Numerical and Theoretical Studies
In this thesis, we explore the best practice of simulating the wakes of the turbines under active yaw control (AYC) using large-eddy simulation (LES). In the first study, we validate the blade-element actuator disk model (ADM-BE) for a yawed wind turbine. ...
EPFL2023A wind tunnel study on cyclic yaw control: Power performance and wake characteristics
Fernando Porté Agel, Arslan Salim Dar, Guiyue Duan
In this study, wind-tunnel experiments are used to investigate cyclic yaw control as a wake mitigation strategy aiming to improve wind farm power production. The control strategy is applied to a single wind turbine and a wind farm comprising of a column of ...
2023The complex winds of the Alps: an unseen asset for the energy transition
Jérôme François Sylvain Dujardin
Wind energy has played a major role in the development of our society since 5000 BC when the first sail boats traveled the Nile River. Wind technology continued to advance with the invention of wind-powered pumps and mills in China and the Middle East as e ...
EPFL2021Numerical Experiments of Atmospheric Boundary Layer flows
Anthropogenic emissions of greenhouse gases due to human activity is causing global warming and inducing climate change. A major implication of global warming is the decreasing ice mass in the polar regions resulting in sea-level rise. It is now known that ...
EPFL2018Incoming Wind and Wake Measurements of a Single 2.5 MW Wind Turbine Using Two Nacelle-Mounted Wind LiDARs for Analytical Wake Model Validation
Fernando Porté Agel, Corey Dean Markfort, Fernando Carbajo Fuertes
The two main effects of a wind turbine wake on those within its region of influence are: first, the wind speed deficit results in a decrease in the power production and second, a more turbulent flow results in higher unsteady structural forces, potentially ...
2018Long-term monitoring of existing wind turbine towers and fatigue performance of UHPFRC under compressive stresses
An increasing number of onshore wind turbines in Europe will reach the end of their relatively short service duration, currently limited to 20 years by the design codes and many owners already wish to extend the service duration of their turbines. Recently ...
EPFL2018Investigation of the incoming wind vector for improved wind turbine yaw-adjustment under different atmospheric and wind farm conditions
Varun Sharma, Marc Calaf Bracons
Regardless of the evolution of wind energy harvesting, the way in which turbines obtain in-situ meteorological information remains the same - i.e. using traditional wind vanes and cup anemometers installed at the turbine's nacelle, right behind the blades. ...
Elsevier2017Wind tunnel study of the wind turbine interaction with a boundary-layer flow: Upwind region, turbine performance, and wake region
Fernando Porté Agel, Majid Bastankhah
Comprehensive wind tunnel experiments were carried out to study the interaction of a turbulent boundary layer with a wind turbine operating under different tip-speed ratios and yaw angles. Force and power measurements were performed to characterize the var ...
Amer Inst Physics2017Perturbations to the Spatial and Temporal Characteristics of the Diurnally-Varying Atmospheric Boundary Layer Due to an Extensive Wind Farm
Varun Sharma, Marc Parlange, Marc Calaf Bracons
The effect of extensive terrestrial wind farms on the spatio-temporal structure of the diurnally-evolving atmospheric boundary layer is explored. High-resolution large-eddy simulations of a realistic diurnal cycle with an embedded wind farm are performed. ...
Springer Verlag2017