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Prinsen, R.C.P. (author)
Individual Pitch Control has been a topic of study in the field of wind turbine engineering for more than a decade. It has been shown that a load reducing controller can be designed that makes use blade root moment measurements. Various authors have performed simulations to estimate the extent to which Individual Pitch Control can reduce fatigue...
master thesis 2011
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Caro, R.C. (author)
Superbus is a new system for sustainable public transport and comprises a vehicle capable of driving at high speeds, a dedicated infrastructure and a demand-driven logistic system. For the Zuiderzeelijn connection between Amsterdam-Schiphol and Groningen, Superbus was found to be superior compared to other high-speed systems with respect to...
master thesis 2013
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Egilsson, Bjarnthor (author)
master thesis 2015
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Gkoutis, Konstantinos (author)
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...
master thesis 2018
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Gupta, V. (author)
Uncertainty in aerodynamic load prediction is an important parameter driving the price of wind energy and thus the wind turbine community is in need of more sophisticated tools for evaluating aerodynamic blade loading. Blade Element Momentum (BEM) theory is the current standard for estimating the wind forces in load case calculations. The...
master thesis 2012
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Manjunath, Pranav (author)
Vortex Generators (VGs) are one of the most commonly used passive flow control devices. Recent studies have shown that it is beneficial to use sub-boundary layer vortex generators (SBVGs). The height of these generators varies between 10% - 50% of the boundary layer thickness. However, the reduced height causes the induced vortices to be...
master thesis 2017
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van der Knaap, E.F. (author)
Models of kites with inflatable support structures that are both fast and accurate can accelerate the development of airborne wind energy systems. The fast particle system approach has not yet been used to model inflatable beam structures. The goal of this research is to investigate if the bending behaviour of inflatable beams can be modelled...
master thesis 2013
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Kemp, R. (author)
This thesis addresses the process of airfoil optimization for vertical axis wind turbines (VAWT). The airfoils are designed for large scale turbines above 5 MW. The VAWT concept is relevant for offshore floating wind energy, because of its low center of gravity (stability) and their simplicity (low maintenance). An optimal tip speed ratio of 4-4...
master thesis 2015
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Becker, Max (author)
The current wind turbine design tools are based on aerodynamic simulations using blade element momentum (BEM) codes to calculate loads and power, see for instance the tools HAWC2, Bladed or FAST. This engineering method is computationally efficient, but theoretically valid only for steady two dimensional flow in non-yawed conditions. <br/><br/...
master thesis 2017
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Benlevi, Aksel (author)
master thesis 2014
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Mutze, C. (author)
Wind energy is currently one of the fastest growing markets in the world. In the Netherlands the potential for onshore wind energy is not large because of siting problems. Therefore the focus in the Netherlands has shifted from onshore to offshore wind energy because the wind climate offshore is substantially better than onshore. For the Dutch...
master thesis
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de Wit, A.K. (author)
As wind turbines become larger and larger, optimization of material usage becomes relatively more important. The reason lies in the direct connection of material use with investment costs, which are becoming more important with larger turbines. For this optimization, proper fatigue analysis and assessment of the extreme loads is highly important...
master thesis 2010
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He, C. (author)
Recent developments in wind energy have identified vertical axis wind turbines as a favored candidate for megawatt-scale offshore systems. Compared with the direct horizontal axis competitors they poss higher potentials for scalability and mechanical simplicity. The wake dynamics of an H-type vertical axis wind turbine is investigated using...
master thesis 2013
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Reijniers, Simon (author)
A wind turbine is designed to produce a maximum amount of energy at minimum cost while it withstands any possible wind condition. In the wind conditions with the highest wind speeds the wind turbine has to cope with the most extreme loads. In these most extreme cases the wind turbine is parked, the blades do not rotate, and the blades deform...
master thesis 2015
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van Heemst, Hans (author)
The continued grow of the wind industry has resulted in an increase in turbine cluster density in wind farms. This has made the topic of wind turbine and wind farm wake aerodynamics more relevant than ever. Wind turbine wake models are used to predict the deficit and recovery of the wind velocities in the wake. The currently used wake models in...
master thesis 2015
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Schelbergen, M. (author)
The knowledge about Vertical Axis Wind Turbines (VAWT) lags behind the knowledge about Horizontal AxisWind Turbines (HAWT), since most of the development of VAWT’s ceased after the 80’s. A lack of insight exists about how certain design parameters affect the rotor design of a modern VAWT. The objective of this thesis is to gain knowledge about...
master thesis 2013
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Ochoa Algarin, C.A. (author)
master thesis 2012
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Ten Hoopen, P.D.C. (author)
The Diffuser Augmented Wind Turbine (DAWT) has been studied periodically over the last five decades. It has already been established by the scientific community that the DAWT is superior to conventional bare wind turbines. In spite of this, the DAWT has not gained popularity worldwide due to high manufacturing cost of the diffuser. There are two...
master thesis 2009
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Jaimes, O.G. (author)
Maintenance of offshore wind turbines is much more expensive than that of onshore machines. Several suggestions have been made in this respect to reduce operation and maintenance costs by employing simpler turbine concepts with higher reliability. Particularly, stall-controlled machines have been suggested as robust and reliable options that...
master thesis 2010
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van der Meulen, M.B. (author)
In the past decades, offshore wind energy has emerged as one of the most promising renewable alternatives to the traditional fossil sources of energy. Although the ocean has a vast potential, with higher wind speeds and lower turbulence levels than onshore, the required marine foundations make the realization of an offshore wind farm expensive....
master thesis 2012
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