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van Hoof, R. (author)Wind energy is growing fast, in numbers but also in size. A bigger wind turbine will experience higher loads during operation. The increase in size and higher loads will both lead to heavier components. This increase in mass should be minimised to avoid additional costs of material, fabrication and lifting. Besides, it is undesirable to have...master thesis 2011
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de Oliveira, G. (author)Actiflow is designing a new generation of wind turbine rotors enhanced by the use of passively powered boundary layer suction to improve the aerodynamic and structural performance of thick profiles. As a part of this effort, this work explores the design space of airfoils with(out) boundary layer suction, outlines major design trends and...master thesis 2011
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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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Verma, A. (author)In an increasingly competitive energy market, the cost of a wind power plant has become more important. A tubular steel tower supporting a wind turbine can amount to up to 20% of the overall turbine costs and its optimization may lead to substantial savings with regard to the costs and the use of materials. One important aspect of the design is...master thesis 2011
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Han, T. (author)The wake effect from upstream wind turbines is a hot topic recently and many researches on wake modeling have been carried out in the past few years. The wake models have evolved from the simple semi-empirical approach to the dynamic meandering model using the Computational Fluid Dynamics (CFD) codes. However, some of current wake models cannot...master thesis 2011
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- van Wijk, B.M. (author) master thesis 2011
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- Michailidis, D. (author) master thesis 2012
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Barten, O. (author)Current large offshore wind turbine design practice is using a powercurve that is flat above rated wind speed. The most important reason for this is generator and electric system costs, while another reason is that parts such as blades and tower are not designed for higher loads. In this report, it is investigated which other possibilities are...master thesis 2012
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- Janssen, J. (author) master thesis 2012
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Kempenaar, A.S. (author)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...master thesis 2012
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Hosman, N. (author)In rural areas of Mali people depend on off-grid gasoline generators for the supply of electricity. Due to the import of expensive gasoline, electricity prices are very high and only few people can afford it. To make electricity cheaper and to stimulate the local economy, local renewable energy sources could be the solution. Due to the use of...master thesis 2012
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Bortolotti, P. (author)Wind turbine rotor blades have seen a strong growth in length and industry is facing new structural problems. New lighter and stiffer materials would be useful to improve the blade design. This research analyses the potential of carbon glass hybrid composites. Three laminates typical of the laminates used in the spar caps and in the trailing...master thesis 2012
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Vezyris, C. (author)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...master thesis 2012
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- Alblas, L.M. (author) master thesis 2012
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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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Mehesh, D.S.V. (author)Wind energy has a longstanding reputation in making daily activities possible for mankind. Whereas in the past wind was used for propelling ships or for milling grain using wind mills, nowadays its market is growing towards the application of wind turbines, generating electricity in a sustainable manner. The growth in the wind energy market is...master thesis 2012
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- Ochoa Algarin, C.A. (author) master thesis 2012
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Baldacchino, D. (author)As wind energy technology continues to take the helm of renewable energy deployed throughout the world, and wind farms become a more common sight on the horizon, increased emphasis is placed on wind farm aerodynamics. Obtaining insight into this complex flow problem requires a deeper understanding of the nature of individual wind turbine wakes,...master thesis 2012
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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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Bos, R. (author)Like many vertical-axis wind turbines (vawts) of the Darrieus type, Turby fails to achieve a fully passive start-up. Experiments indicate that there is a band of negative torque—often referred to as dead band in literature—somewhere in the tip speed range 0.5 B l B 1.6. The reason behind this is that, unfortunately, the power coefficient...master thesis 2012