Influence of geometric imperfections and increasing turbine sizes on validity load transfer functions in bolted ring-flange connections

The global focus on climate change and the transition away from fossil fuels has highlighted the importance of renewable energy sources. Offshore wind turbines are being optimized and are therefore growing in size and power. <br/><br/>This research focuses on bolted ring-flange connections, a connection type that plays a crucial role in the...

Layout Optimization Methods for Offshore Wind Farms Using Gaussian Processes

Surrogate modeling is a family of engineering techniques that attracts great interest today and can be applied in many challenging fields. A big advantage of it is that surrogate models (models based on these techniques) offer reliable results by being computationally cheaper than other candidate models. The savings in computational time is...

Optimization of offshore wind farm installation procedure with a targeted finish date

Offshore Wind Farm (OWF) installation procedure is a complicated phase requiring excellent management of resources for timely completion of tasks. The wind farm installation period involves crucial stages like streamlining onshore logistics, transportation of components on vessels, installation of foundations, wind turbines, and cable laying,...

Estimation of the Optimum Wind Turbine Size for two Different Offshore Sites and Wind Farm Rated Powers

Large turbines are a synonym of more energy harvested from the wind, but also of increment in the costs. This dilemma has led many researchers on the field of wind energy to wonder about the optimum size for wind turbines concerning the lowest cost of energy. This project studies the optimum turbine size for offshore applications through the...

Determination of Fatigue Assessment of Monopile - Based Offshore Wind Turbines through Fidelity Quantification

The application of stability checks in simulated offshore wind structures is performed through tools that are established in the offshore wind industry. In particular, the structure should fulfill certain strength and fatigue criteria among which Fatigue Limit States (FLSs) checks are critical. In terms of the process, fatigue assessment can be...

Simplified Fatigue Assessment of Offshore Wind Turbine Full Height Lattice Structures in the Frequency Domain

New concepts for support structures of offshore wind turbines have gained interest in the industry and are examined for intermediate and deep water depths in order to unlock new offshore potential markets. One of the main proposals that has already been commercialized is the three or four leg full height lattice structure. The fatigue assessment...

Layout Optimization of Offshore Wind Farms affected by Wake effects, Cable topology and Support Structure variation

As part of the effort to reduce the cost of offshore wind energy, this MSc Thesis deals with the layout optimization of an Offshore Wind Farm affected by wake effects, cable topology and support structure variation. The main objective of the current MSc Thesis is to investigate how important each of these aspects for the layout optimization is....

The nonlinear effect of combining uncertainties on the energy yield of an offshore wind farm

Offshore wind energy is expected to grow in the coming years: future plans for offshore wind farms total more than 98 GW. Financing is needed to realise these plans. Investment decisions partly depend on the uncertainty in energy yield predictions. It is therefore important that these energy yield predictions and their corresponding uncertainty...

Offshore wind farm optimization, investigation of unconventional and random layouts

This project aims at investigating whether or not unconventional and/or random offshore wind farm layouts lead to better performance of the farm. The determination of each solution is based on the estimated value of the Levelized Production Cost, thus the cost per produced unit of energy (i.e., ecents/kWh). For the purposes of the current...

Small Scale Fluid Power Transmission for the Delft Offshore Turbine

The Delft Offshore Turbine (DOT) project is a research project within the Delft University Wind Energy Research Institute (DUWIND). The main objective of the DOT research project is to make offshore wind energy a competitive energy source. One of the research lines in the DOT project is considering the centralization of electricity generation...