Searched for: contributor%3A%22Ferreira%2C+Carlos+%28mentor%29%22
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Saleem, Zohaib (author)Passive root flaps and in particular the Gurney flaps have been employed for improving aerodynamic characteristics for various applications since the 1970's. The effects of passive flaps on two dimensional airfoils have therefore been studied extensively, however, research on their application to Horizontal axis wind turbine blades (HAWT) is...master thesis 2019
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Leichsenring, Maaike (author)Ocean Thermal Energy Conversion (OTEC) uses the temperature difference between the surface and deep layers to generate electricity. The temperatures in the ocean hardly vary between day and night or between the seasons, which ensures a very constant energy production with OTEC. In order for OTEC to compete with the current forms of energy...master thesis 2019
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Hofstad, Magnus (author)Heat pumps represent an effective technology to convert electrical energy to thermal energy through the expansion and compression of a refrigerant. Heat pumps are becoming increasingly more efficient<br/>which decreases energy consumption. However as heat pumps are getting increasingly more efficient, complexity is also increasing which leads to...master thesis 2018
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van Strijp, Pieter (author)One of the world greatest priorities is to move to a sustainable world, while the global energy demand is growing. Ocean Thermal Energy Conversion (OTEC) is a base-load renewable electricity technology that has the potential to contribute to a sustainable power supply on a world-wide scale. OTEC creates sustainable power utilizing the...master thesis 2018
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Roumpedakis, Tryfonas (author)The rapid growth of power systems supplied by sustainable energy sources and the attempt towards the decrease of CO₂ emissions has resulted in the increase of decentralized energy systems over the last decades. Tri-generation systems utilizing an Organic Rankine Cycle (ORC) can offer a reliable alternative towards that direction. In particular,...master thesis 2018
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de Vries, Auke (author)District heating networks (DHN) are frequently considered an alternative heating solutions in the energy transition. The implementation of thermal storage in large-scale, existing, district heating networks was researched in this study. Thermal storage was found to enable the incorporation of sustainable heat sources and optimise fuel usage in...master thesis 2018
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- Saes, Thomas (author) master thesis 2018
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Faber, Mark (author)Aeroelastic codes are fundamental for the design of wind turbines and the prediction of instabilities. Such codes rely on engineering models which limit their accuracy. With wind turbine blades becoming more slender to lower the costs, it is important to reduce these uncertainties to maintain a safe and stable turbine design. The dynamic stall...master thesis 2018
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Guđmundsdóttir, Kristin (author)The main objective of this study was to develop a quick model for an oil free twin screw compressor. The computational time of the model was to be kept as low as possible so that the model could be used for quick estimations and optimizations of the process. This was done by using a simple geometry focusing on the volume curve and port sizes,...master thesis 2018
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van der Deijl, Wessel (author)In the case of unsteady loading conditions at a rotor, the induced velocity response lags the thrust coefficient at the rotor. The two parameters that are responsible for unsteady loading conditions are rotor thrust (due to blade pitch, or rotational speed) and incoming wind speed. The induced velocity response to these two sources of...master thesis 2018
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Fortman, Frits (author)Concentrated solar technologies have been successfully used to collect solar irradiance and transform it into useful heat for electricity generation. A problem in these systems is often that a mismatch between input and output is present due to variable solar irradiance and energy demand. To compensate for this mismatch storage is utilized to...master thesis 2018
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Gnanasundaram, Arun (author)The whole construct of explicit algebraic Reynolds stress models, as they are known in RANS, is based on the weak equilibrium assumption. By employing this assumption, and in addition, incorporating models for terms in the Reynolds stress transport equations, the system of six partial differential equations can be simplified to an algebraic form...master thesis 2018
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- Jadeja, Ashutosh (author) master thesis 2018
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Boohalli Shivamallegowda, Greeshma (author)Airfoil design plays an important role in improving the performance of Vertical Axis Wind Turbines(VAWTs). The aim of this thesis is to arrive at optimal airfoil geometries to enhance the performance of VAWTs and analyse the performance of these optimal airfoils under steady and unsteady operation conditions of the rotor. The airfoil design is...master thesis 2018
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MANDRU, MANOJ (author)On a typical 2D LEI kite profile, ow separation is expected to occur on both suction and pressure sides of the airfoil. This thesis is aimed to study various inviscid ow models that are capable of modeling such multiple ow separation phenomena. Inviscid models are capable of modeling single ow separation region over typical airfoils. In these...master thesis 2018
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Drommel, Sven (author)The demand of energy increases steadily due to the growing global population and the increasing living standard of emerging markets. The increasing energy demand and reduction of greenhouse gasses require a significant increase of renewable energy sources and energy efficiency of buildings. Also, the increasing degree of renewable energy sources...master thesis 2018
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Adriaanse, Michiel (author), de Jel, Jordy (author), Lageweg, Sjoerd (author), Wijnands, Jasper (author)Bluerise has developed a system that uses cold seawater to cool down a fresh water loop. This loop is used for fresh water production. The goal of this study is to improve the overall heat transfer coefficient of the working medium in this system by at least 5%, which will also reduce its size. The overall heat transfer can be improved by adding...bachelor thesis 2018
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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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Manzoor, Qasim (author)The Blade Element Momentum (BEM) method is a widely used model for rotor performance and aeroelastic calculations but it has assumptions in its formulation which limit its accuracy. The theoretical background of these limitations has been studied and an improvement in the form of the Near Wake Model (NWM) has been identified. The model adds near...master thesis 2017
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Li, Ang (author)The aim of this thesis is to evaluate the influence between the two counter-rotating VAWT rotors with the Double Actuator Cylinder (DAC) model which will be validated against the panel code. The DAC model is developed from the original Actuator Cylinder (AC) model which includes the Modified-Linear (Mod-Lin) correction. The original AC model for...master thesis 2017
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