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Berdowski, T.J. (author), Ferreira, Carlos (author), van Zuijlen, A.H. (author), van Bussel, G.J.W. (author)A PhD project is being carried out on the topic of far-wake aerodynamics of Horizontal Axis Wind Turbines (HAWTs) in yawed conditions, which has a large relevance for wind farm design and optimization. Characteristic for a turbine in yaw are the inherent unsteady and non-uniform rotor loading, and the typical wake deflection and strong three...abstract 2017
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LeBlanc, B.P. (author), de la Garza Cuevas, R. (author), Ferreira, Carlos (author)Research into the Vertical Axis Wind Turbine (VAWT) has been progressing over the last few years due to<br/>the large shift in design constraints for large floating offshore wind turbines by leveraging tools and experience<br/>from research beginning in the 1970s and lasting until the HAWT established market dominance in the 1990s. The beginning...abstract 2017
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De Tavernier, D. (author), Ferreira, Carlos (author), Goude, Anders (author)This chapter highlights the main aerodynamic phenomena and challenges of vertical-axis wind turbines. First, an introduction is provided on the VAWT history and (dis-)advantages. The basics of VAWT aerodynamics and the various rotor simplifications/representations are presented. Further, the state-of-the art aerodynamic modeling techniques,...book chapter 2022
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- Van der Pijl, F.F.A. (author), Bauer, P. (author), Ferreira, J.A. (author), Polinder, H. (author) conference paper 2007
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- Bang, D. (author), Polinder, H. (author), Shrestha, G. (author), Ferreira, J.A. (author) conference paper 2009
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Shrestha, G. (author), Polinder, H. (author), Bang, D. (author), Jassal, A.K. (author), Ferreira, J.A. (author)A direct drive generator used in wind turbine has high energy yield compared to other drivetrain topologies and low maintenance is expected as the technology matures. On the other hand direct drive generator weight and size increases rapidly when scaled up to larger units. This paper will investigate the possibility of weight reduction of large...conference paper 2009
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J.J. Wolmarans, J.J. (author), Ferreira, J.A. (author)At the hand of a case study alternative energy sources, methods of transportation and their effect on the electricity grid oncefossilfuels have been depleted is discussed. Three methods of sustainable transport are presented. The energy requirement for each is calculated as well as the requirements from the electricity grid for traveling a 200km...conference paper 2007
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Weber, J.H. (author), Schouhamer Immink, K.A. (author), Ferreira, H.C. (author)Knuth's celebrated balancing method consists of inverting the first z bits in a binary information sequence, such that the resulting sequence has as many ones as zeroes, and communicating the index z to the receiver through a short balanced prefix. In the proposed method, Knuth's scheme is extended with error-correcting capabilities, where it is...conference paper 2011
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- Zhou, Y. (author), Bauer, P. (author), Ferreira, J.A., Pierik, J. (author) conference paper 2007
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- de Jong, E.C.W. (author), Popovic, J. (author), Ferreira, J.A. (author) conference paper 2006
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Ani, S.O. (author), Polinder, H. (author), Ferreira, J.A. (author), Ockels, W.J. (author)This paper discusses the possibilities of applying high temperature superconducting (HTS) synchronous motor to Superbus, an alternative and sustainable type of public transportation developed at TU Delft. Two important factors within the Superbus drive that influence the operating range are weight and efficiency: increasing the weight results in...conference paper 2009
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- Shrestha, G. (author), Polinder, H. (author), Bang, D.J. (author), Ferreira, J.A. (author) conference paper 2007
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- Bang, D.J. (author), Polinder, H. (author), Ferreira, J.A. (author), van Rooij, R.P.J.O.M. (author) conference paper 2007
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Akay, B. (author), Micallef, D. (author), Ferreira, C.S. (author), Van Bussel, G.J.W. (author)This paper sets out to describe the measurements and computations to construct three components of velocity field around the blade. The primary aim of the measurements was to gain insight into the physics of the flow field produced by a horizontal axis wind turbine-HAWT blade. Stereo Particle Image Velocimetry experiments were performed on a two...conference paper 2011
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Van der Geest, M. (author), Wolmarans, J.J. (author), Polinder, H. (author), Ferreira, J.A. (author), Zeilstra, D. (author)High speed fault tolerant permanent magnet machines have strong asynchronous airgap harmonics, making them susceptible to rotor eddy-current losses. These losses can be reduced by using novel high resistivity materials like plastic bonded magnets and carbon fiber reinforced retaining sleeves. This paper examines by numerical studies the...conference paper 2012
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Micallef, D. (author), Kloosterman, M. (author), Ferreira, C.S. (author), Sant, T. (author), Van Bussel, G.J.W. (author)The primary objective of the MEXICO (Model Experiments in Controlled Conditions) project was to generate experimental data for validation of models for wind turbines. Kulite©pressure sensors were used for pressure measurements while Particle Image Velocimetry was used with the aim of tracking the tip vortex trajectory. The pressure measurements...conference paper 2010
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Akay, B. (author), Ferreira, C.S. (author), Van Bussel, G.J.W. (author)Several methods from experimental to analytical are used to investigate the aerodynamics of a horizontal axis wind turbine. To understand 3D and rotational effects at the root region of a wind turbine blade, correct modeling of the flow field is essential. Aerodynamic models need to be validated by accurate experimental data. In this paper, the...conference paper 2010
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Haerens, P. (author), Ciavola, P. (author), Ferreira, O. (author), Van Dongeren, A. (author), Van Koningsveld, M. (author), Bolle, A. (author)Extreme coastal storms have a destructive impact on coastal areas and directly affect people living in the coastal zone, being this emphasized by recent events (e.g. Katrina, Xynthia) which reminded the world of the vulnerability of coastal areas. The economic constraints and the increasing vulnerability of coastal areas (due to sea level rise...conference paper 2012
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- Zhou, Y. (author), Ferreira, J.A. (author), Bauer, P. (author) conference paper 2007
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- van der Pijl, F.F.A. (author), Ferreira, J.A. (author), Bauer, P. (author), Polinder, H. (author) conference paper 2006