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Dissertations / Theses on the topic 'Wave energy conversion'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Guerrero, Felipe Martinez. "Development of a wave energy basin to maximize wave energy conversion." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20241.

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2

Thorburn, Karin. "Electric Energy Conversion Systems : Wave Energy and Hydropower." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7081.

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3

Boström, Cecilia. "Electrical Systems for Wave Energy Conversion." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-140116.

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Wave energy is a renewable energy source with a large potential to contribute to the world's electricity production. There exist several technologies on how to convert the energy in the ocean waves into electric energy. The wave energy converter (WEC) presented in this thesis is based on a linear synchronous generator. The generator is placed on the seabed and driven by a point absorbing buoy on the ocean surface. Instead of having one large unit, several smaller units are interconnected to increase the total installed power. To convert and interconnect the power from the generators, marine su

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4

Warner, John M. "Wave energy conversion in a random sea." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ31537.pdf.

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5

Danielsson, Oskar. "Wave Energy Conversion : Linear Synchronous Permanent Magnet Generator." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7194.

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6

McPeake, F. A. "Wave energy conversion using small scale floating devices." Thesis, Queen's University Belfast, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374227.

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7

Clabby, Darragh. "Wave energy conversion at prototype and model scales." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.673795.

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The performance of a Wave Energy Converter (WEC) may be estimated using both physical and numerical modelling techniques. Since numerical models are often informed by, and validated against data obtained from physical models, it is important to assess the accuracy with which a prototype's behaviour is predicted by its physical model. This thesis makes such an assessment for the case of a pitching flap type WEC, by comparing the performance of Aquamarine Power's Oyster1 prototype device to that of a representative physical model. This comparison was informed by considering the device in terms o

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8

Curran, R. "Utilisation of the Wells turbine for wave energy conversion." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318884.

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9

Carpintero, Moreno Efrain. "Wave energy conversion based on multi-mode line absorbing systems." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/wave-energy-conversion-based-on-multimode-line-absorbing-systems(dc39c038-c89e-4243-be4c-062a6e27be5b).html.

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Wave energy conversion remains a promising technology with substantial renewable resources to be exploited in many parts of the world. However to be commercially attractive more effective conversion is desirable. There is scope for increasing power capture by use of several bodies responding with several modes, some or all of which may undergo resonance for frequencies within a wave climate. This theme is explored here with a floating moored line absorber system where the relative motion generates power by incorporation of a damper to represent the power take off. To be most effective the bodi

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10

Elamalayil, Soman Deepak. "Multilevel Power Converters with Smart Control for Wave Energy Conversion." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-332730.

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The main focus of this thesis is on the power electronic converter system challenges associated with the grid integration of variable-renewable-energy (VRE) sources like wave, marine current, tidal, wind, solar etc. Wave energy conversion with grid integration is used as the key reference, considering its high energy potential to support the future clean energy requirements and due the availability of a test facility at Uppsala University. The emphasis is on the DC-link power conditioning and grid coupling of direct driven wave energy converters (DDWECs). The DDWEC reflects the random nature o

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11

Wu, Feng. "Modelling and control of wind and wave energy conversion systems." Thesis, University of Birmingham, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525483.

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The modelling and control of wind and wave energy conversion systems is carried out in this thesis. The thesis comprises two parts. The first part is focused on the modelling and control of wind conversion system while the second part is on the modelling and control of wave energy conversion system (WEe). In the first part, the small signal stability of the \\lind turbine (\VT) with doubly fed induction generator (DFIG) and the WT with direct-drive permanent magnet generator (DDPMG) an: analysed using detailed models. A parameter tuning algorithm and a nonlinear controller are proposed, respec

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12

Kalpaktsoglou, Dimitrios. "Power factor correction for stand-alone wave energy conversion buoys." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.519591.

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13

Krishna, Remya. "Grid Connected Three-Level Converters : Studies for Wave Energy Conversion." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-218219.

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This thesis presents an electrical system analysis of a wave energy converter (WEC) for the objective of grid connection. To transfer the enormous amount of power from waves to the load centers, efficient power electronic systems are essential. This thesis includes the modeling of a buoy–translator dynamics and the modeling of a linear permanent magnet generator along with simulation and experimental validation. Diode bridge rectifiers are considered for rectification to avoid the complex linear generator control at the input side. To reduce the size and the cost of energy storage elements, DC

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14

Ackerman, Paul Henry. "Air turbine design study for a wave energy conversion system." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4270.

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15

Lindroth, [formerly Tyrberg] Simon. "Buoy and Generator Interaction with Ocean Waves : Studies of a Wave Energy Conversion System." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160085.

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On March 13th, 2006, the Division of Electricity at Uppsala University deployed its first wave energy converter, L1, in the ocean southwest of Lysekil. L1 consisted of a buoy at the surface, connected through a line to a linear generator on the seabed. Since the deployment, continuous investigations of how L1 works in the waves have been conducted, and several additional wave energy converters have been deployed. This thesis is based on ten publications, which focus on different aspects of the interaction between wave, buoy, and generator. In order to evaluate different measurement systems, th

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16

Ditlefsen, Arne Marius. "Wave Energy Conversion : Simulation Verification and Linearization of Direct Drive Wave Energy Converter with Variable DC-link Voltage Control." Thesis, Norwegian University of Science and Technology, Department of Electrical Power Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9912.

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<p>Lowering the cost of wave energy conversion is an essential task for it to succeed as a future energy resource. In this work a converter, assumed cheaper than the regular back to back converter setting, have been investigated for a electric direct drive point absorber. Both experimental work and simulations are used in the analysis. In the experimental work, a permanent magnet generator with a 6-pulse diode rectifier, a DC-link and a DC/DC converter equivalent, was used. Steady state, dynamic and transient measurements were preformed and a simulation model was compared to the measurements.

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17

Lin, Chia-Po. "Experimental studies of the hydrodynamic characteristics of a sloped wave energy device." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/7521.

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Many wave energy convertors are designed to use either vertical (heave) or horizontal (surge) movements of waves. But the frequency response of small heaving buoys and oscillating water column devices shows that they are too stiff and so their resonance is at too short a period. A device moving in the horizontal (surge) direction has less restoring spring and so its resonance is at too long a period. It follows that a device that moved at some intermediate slope angle could have an intermediate value of hydrodynamic stiffness and so be resonant at a variable and desirable part of the wave spec

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18

LICHERI, FABIO. "Experimental and numerical investigations of Wells turbines for wave energy conversion." Doctoral thesis, Università degli Studi di Cagliari, 2022. http://hdl.handle.net/11584/332667.

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This thesis deals with the evaluation of the performance of a Wells turbine both with experimental and numerical investigations. In particular, results are used to highlight the contribution of different loss sources in determining the turbine efficiency. Numerical investigations have been focused at calculating the turbine efficiency using both direct and indirect methods, i.e. by considering the quantities of interest at the inlet and at the outlet of the turbine, as well as through the estimation of entropy generation inside the domain. Experimental investigations have been conducted at t

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19

Xu, Mingzhou. "A study of induction generator performance in a wave energy conversion system." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387930.

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20

Velez, Carlos Alberto Busto. "CFD analysis of a uni-directional impulse turbine for wave energy conversion." Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4714.

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Ocean energy research has grown in popularity in the past decade and has produced various designs for wave energy extraction. This thesis focuses on the performance analysis of a uni-directional impulse turbine for wave energy conversion. Uni-directional impulse turbines can produce uni-directional rotation in bi-directional flow, which makes it ideal for wave energy extraction as the motion of ocean waves are inherently bi-directional. This impulse turbine is currently in use in four of the world's Oscillating Wave Columns (OWC). Current research to date has documented the performance of the

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21

Langhamer, Olivia. "Wave energy conversion and the marine environment : Colonization patterns and habitat dynamics." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-107193.

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A wave energy park has been established on the Swedish west coast outside Lysekil and pioneer work about its interactions with the marine environment has been conducted. So far, little is known about the effects of offshore energy installations on the marine environment, and this thesis assists in minimizing environmental risks as well as in enhancing potential positive effects on the marine environment. The Lysekil research site is situated about two kilometres offshore and has been under development since 2005. During this time 26 “environmental devices”, without generators, consisting of a

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22

Nithin, Jose Madassery. "Design and layout of power conversion chain for a wave energy converter." Thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202403.

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Wave energy has the potential to provide an energy resource in this challenging energyenvironment. Wave energy converters are devices used to extract this energy and convertit into electricity. Wave Carpet is an example of such a novel wave energy converters andin its final form, it consists of a submerged membrane which covers an arbitrarily largearea above the sea floor. Incident waves create a pressure difference between the upper andlower surfaces, which triggers an up-and-down movement. The power take-off attached tothe surfaces serve to restrict this movement and thereby extract hydrauli

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23

Eriksson, Mikael. "Modelling and Experimental Verification of Direct Drive Wave Energy Conversion : Buoy-Generator Dynamics." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7785.

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This thesis is focused on development of models and modelling of a wave energy converter in operation. Through the thesis linear potential wave theory has been used to describe the wave-buoy interaction. The differences lie in the generator models, in the simplest model the generator is a mechanical damper characterized by a damping factor. In the most advanced generator model the magnetic fields is calculated the by a FE-method, which gives detailed description of the electric properties and the effect it has on the buoy dynamics. Moreover, an equivalent circuit description of the generator h

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24

Crozier, Richard Carson. "Optimisation and comparison of integrated models of direct-drive linear machines for wave energy conversion." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/8988.

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Combined electrical and structural models of five types of permanent magnet linear electrical machines suitable for direct-drive power take-off on wave energy applications are presented. Electromagnetic models were developed using polynomial approximation to finite element analysis results. The structural models are based on simple beam theory, other classical techniques, and automated finite element analysis formulations. The machine models have been integrated with a time-domain model of a wave energy converter based on a heaving buoy. They have then been optimised using a genetic algorithm

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25

Khan, Muhammad Ahsan. "CFD Applications for Wave Energy Conversion Devices (MoonWEC) and Turbulent Fountains for Environmental Fluid Mechanics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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This thesis is based on two studies that are related to floating wave energy conversion (WEC) devices and turbulent fountains. The ability of the open-source CFD software OpenFOAM® has been studied to simulate these phenomena. The CFD model has been compared with the physical experimental results. The first study presents a model of a WEC device, called MoonWEC, which is patented by the University of Bologna. The CFD model of the MoonWEC under the action of waves has been simulated using OpenFOAM and the results are promising. The reliability of the CFD model is confirmed by the laboratory ex

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26

Shek, Jonathan K. H. "Reaction force control of a linear electrical generator for direct drive wave energy conversion." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/14404.

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27

Atia, Salwa. "Dual functionality artificial neural network technique for wells turbine based wave energy conversion system." Thesis, Staffordshire University, 2018. http://eprints.staffs.ac.uk/4762/.

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Wave energy is of particular interest amongst new market-penetrating renewable energy resources. Although energy extraction from wave motion is still in its infancy, recent studies predict rapid development. Several studies have investigated various wave energy harvesting configurations. The oscillating water column (OWC) is the most common type. The OWC is based on a Wells turbine system coupled to a doubly fed induction generator (DFIG) grid connected via a back-to-back converter, which is inherently advantageous, enabling this arrangement to dominate the wave energy conversion field. Like t

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28

BONFANTI, MAURO. "Mixing the Power of Water and Oil: The Hydraulic PTO for Wave Energy Conversion." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2928620.

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29

Jarocki, Dmitri. "Wave Energy Converter Performance Modeling and Cost of Electricity Assessment." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/278.

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California is experiencing a rapid increase in interest for the potential of converting ocean waves into clean electricity. Numerous applications have been submitted for the permitting of such renewable energy projects; however the profitability, practicability, and survivability have yet to be proven. Wave energy conversion technology has steadily matured since its naissance in the 1970’s, several wave energy power installations currently exist, and numerous plans for commercial power plant are in the works on the shores of multiple continents. This study aims to assess the economic viability

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30

Moreno, Miquel Adria <1986&gt. "Development, Analysis and Comparison of two Concepts for Wave Energy Conversion in the Mediterranean Sea." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amsdottorato.unibo.it/8136/1/PhD_Thesis_Full_Text_Adria_Moreno_Miquel.pdf.

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The investigations carried out during this Ph.D. programme relate to the marine engineering field, more specifically to wave energy conversion. Two different wave energy converters have been modelled numerically with the aim to assess the feasibility of wave energy conversion in the Mediterranean Sea. The first studied wave energy converter, named HPA-LG, is a heaving point absorber with a linear generator placed at the seabed. Two variants of the WEC have been examined, paying particular attention to the floater dimensions and to the geometrical design of the PTO. Initially, only the

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31

Joubert, J. R. "An investigation of the wave energy resource on the South African Coast, focusing on the spatial distribution of the South West coast." Thesis, Link to the Internet, 2008. http://hdl.handle.net/10019.1/351.

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32

Haikonen, Kalle. "Underwater radiated noise from Point Absorbing Wave Energy Converters : Noise Characteristics and Possible Environmental Effects." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-235016.

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The conversion of wave energy into electrical energy has the potential to become a clean and sustainable form of renewable energy conversion. However, like all forms of energy conversion it will inevitably have an impact on the marine environment, although not in the form of emissions of hazardous substances (gases, oils or chemicals associated with anticorrosion). Possible environmental issues associated with wave energy conversion include electromagnetic fields, alteration of sedimentation and hydrologic regimes and underwater radiated noise. Underwater noise has the potential to propagate o

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33

Joubert, James Rattray. "Design and development of a novel wave energy converter." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85817.

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Thesis (PhD)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The design, development and evaluation of a novel wave energy converter (WEC) device, called the ShoreSWEC, in a South African port development is presented. Based on the device requirements, site selection criteria were specified and applied to identify a suitable deployment location. A wave modeling procedure was developed to determine the operational wave conditions and available wave power resource at the selected location. The site was found to have a low mean annual average resource of approximately 2.3 kilowatt per

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34

Moisel, Christoph, and Thomas Carolus. "A facility for testing the aerodynamic and acoustic performance of bidirectional air turbines for ocean wave energy conversion." Elsevier, 2016. https://publish.fid-move.qucosa.de/id/qucosa%3A36338.

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Bidirectional air turbines are used in oscillating water column (OWC) power plants for harnessing ocean wave energy. This paper describes the bidirectional aerodynamic and aero-acoustic facility at the University of Siegen for model air turbines performance testing. At least nine test facilities are known worldwide, but their layout, the performance testing procedure and the presentation of performance data are not standardized to this day. The layout of the facility at the University of Siegen follows ideas in ISO 5801 for fan performance testing. The pressurized air supply is bidirectional b

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35

Banerjee, S. "Ocean energy assessment : an integrated methodology." Thesis, Coventry University, 2011. http://curve.coventry.ac.uk/open/items/16196d0d-e671-489a-ba71-f20cdb6c8df3/1.

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The huge natural energy resources available in the world’s oceans are attracting increasing commercial and political interest. In order to evaluate the status and the degree of acceptability of future Ocean Energy (OE) schemes, it was considered important to develop an Integrated Assessment Methodology (IAM) for ascertaining the relative merits of the competing OE devices being proposed. Initial studies included the gathering of information on the present status of development of the ocean energy systems on wave, OTEC and tidal schemes with the challenges faced for their commercial application

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36

Fabregas, Flavia Francesc. "A numerical tool for the frequency domain simulation of large clusters of wave energy converters." Thesis, Ecole centrale de Nantes, 2017. http://www.theses.fr/2017ECDN0011.

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Plusieurs convertisseurs d’énergie houlomotrice composés d’un grand réseau compact O(100) de petits flotteurs ont été proposés comme étant des systèmes avantageux pour l’extraction de l’énergie des vagues et représentent une alternative aux technologies basées sur un seul flotteur de plus grande taille. Leur capacité d’extraction d’énergie ayant été prouvé, l’accent est désormais mis sur l’optimisation pour adapter le coût de l’électricité produite aux tarifs du marché. L’un des défis les plus importants auxquels la modélisation numérique de ces systèmes houlomoteurs fait face est le calcul de

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37

Yi, Kaijun. "Controlling guided elastic waves using adaptive gradient-index structures." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC044/document.

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Les matériaux à gradient d'indice de réfraction (GRIN) présentent des propriétés mécaniques variant en temps ou/et en espace. Ils ont été testés pour des applications prometteuses dans de nombreuses applications d'ingénierie, comme pour le contrôle santé structurale ou la surveillance de structure (SHM), le contrôle des vibrations et bruit, la récupération d'énergie, etc. D'un autre côté, les matériaux piézoélectriques offrent la possibilité de réaliser des cellules composites dont les propriétés mécaniques peuvent être contrôlées en ligne. Motivé par ces deux approches, cette thèse étudie la

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38

Lundin, Staffan. "Marine Current Energy Conversion." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-280763.

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Marine currents, i.e. water currents in oceans and rivers, constitute a large renewable energy resource. This thesis presents research done on the subject of marine current energy conversion in a broad sense. A review of the tidal energy resource in Norway is presented, with the conclusion that tidal currents ought to be an interesting option for Norway in terms of renewable energy. The design of marine current energy conversion devices is studied. It is argued that turbine and generator cannot be seen as separate entities but must be designed and optimised as a unit for a given conversion sit

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39

Aubry, Judicaël. "Optimisation du dimensionnement d’une chaîne de conversion électrique directe incluant un système de lissage de production par supercondensateurs : application au houlogénérateur SEAREV." Thesis, Cachan, Ecole normale supérieure, 2011. http://www.theses.fr/2011DENS0042/document.

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Le travail présenté dans cette thèse porte sur l'étude du dimensionnement d'une chaine de conversion électrique en entrainement direct d'un système direct de récupération de l'énergie des vagues (searev). Cette chaine de conversion est composée d'une génératrice synchrone à aimants permanents solidaire d'un volant pendulaire, d'un convertisseur électronique composé de deux ponts triphasés à modulation de largeur d'impulsion, l'un contrôlant la génératrice, l'autre permettant d'injecter l'énergie électrique au réseau. En complément, un système de stockage de l'énergie (batterie de supercondensa

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Rocha, Thiago Peternella. "Estudo numérico de unidade flutuante monocoluna para conversão de energia de ondas do mar." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-05012018-083552/.

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O uso contínuo de combustíveis fósseis já se mostrou deletério há anos, além de ser um meio energético finito. Por este motivo, a demanda atual e futura por sistemas de energia limpa é grande. Muito embora já existam diversas estruturas dedicadas a extrair energia do mar, o conceito em que se pretende trabalhar é inovador e de tecnologia nacional. Este tema foi desenvolvido inicialmente em uma abordagem teórica pelo então aluno de engenharia naval Daniel Prata Vieira e sua colega Ana Luísa Orsolini, como Trabalho Final do curso de Engenharia Naval e Oceânica da Escola Politécnica da USP, orien

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41

Soto, Valle Rodrigo Andrés. "Conversión de energía eólica mediante vibraciones inducidas." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/140479.

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Magíster en Ciencias de la Ingeniería, Mención Mecánica. Ingeniero Civil Mecánico<br>Energy harvesting es la conversión de energía presente en el entorno a energía eléctrica. Dentro de esta clasificación la energía eólica puede ser capturada desde diferentes fuentes: naturales, como flujo de aire en campos libres; pseudo-artificiales, como corrientes de aire en ambientes urbanos; artificiales, como túneles de transporte, autopistas y ductos de ventilación. Este trabajo de Tesis tiene como objetivo principal estudiar la potencia capturable debido a la interacción fluido-estructura de un arregl

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42

REBOLI, TOMMASO. "Energia dal mare: analisi prestazionale di dispositivi per la conversione energetica da moto ondoso in ambiente rilevante." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1006224.

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L’attuale scenario energetico globale ed ambientale, focalizzato sempre di più sulla ricerca di soluzioni energetiche sostenibili in grado da rappresentare un’alternativa efficace e conveniente all’utilizzo delle risorse fossili, vede nell’energia dal mare, ed in particolare del moto ondoso, una risorsa energetica molto interessante, visto l’enorme potenziale di cui dispone. Tuttavia, la grande variabilità del fenomeno e l’estrema complessità ed aggressività dell’ambiente ove si intende operare rende l’individuazione di una tecnologia efficiente, robusta, replicabile ed a basso costo una sfida

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Currin, Hugh D. "A dynamic prescribed vortex wake model for the FAST/AeroDyn wind energy conversions simulation code." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3258834.

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44

Gendron, Benjamin. "Modélisation et optimisation d’un système de récupération de l’énergie des vagues électro-actif déformable." Thesis, Ecole centrale de Nantes, 2017. http://www.theses.fr/2017ECDN0024.

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Les convertisseurs d'énergie des vagues ont beaucoup évolué depuis les premiers prototypes dans les années 1970. D'abord rigides et composés de sections articulées, de nouveaux systèmes houlomoteurs sont maintenant entièrement flexibles comme le S3 développé par l'entreprise SBM Offshore. Ce système est composé d'un tube élastique fermé et rempli d'eau dont les déformations radiales sont directement converties en électricité grâce à l'utilisation de bagues en polymère électro-actif. L'objectif de cette thèse est de développer un modèle numérique qui soit capable de prédire le comportement du s

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Santoro, Francesco [Verfasser]. "DC-DC Voltage Conversion for Low Wake-Up Energy Applications: Design Considerations and Implementation / Francesco Santoro." Düren : Shaker, 2020. http://d-nb.info/1208599240/34.

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Machado, Bianca Neves. "Estudo numérico tridimensional de um dispositivo de galgamento para conversão de energia das ondas do mar em energia elétrica aplicando o método Constructal Design." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/149838.

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O princípio operacional do dispositivo de galgamento consiste de uma estrutura que utiliza uma rampa para direcionar as ondas incidentes para o reservatório. A água armazenada retorna para o oceano após a passagem por uma turbina que está acoplada a um gerador de energia elétrica. O presente trabalho propõe dois estudos numéricos a respeito de um conversor de energia das ondas do mar do tipo galgamento. Para ambos os casos, o objetivo do estudo é a aplicação do método Design Construtal na definição da melhor forma para a rampa de modo a maximizar a massa de água que entra no reservatório, cond

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Cordeiro, Maíra Granero. "Modelagem e análise de desempenho de sistema para geração de energia elétrica através de ondas marítimas." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-14072016-144448/.

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Mediante a crescente necessidade de aumento na oferta de energia elétrica devido à constante elevação na demanda mundial, esta dissertação avalia o desempenho de um sistema conversor de energia de ondas marítimas em energia elétrica. O sistema em análise é o de coluna de água oscilante com turbina de dupla ação instalado na costa. Utiliza-se um modelo regular de ondas como perturbação à dinâmica de uma câmara semi-submersa gerando fluxo de ar através de uma turbina à ar de dupla ação. O sistema final é não linear e com parâmetros variantes no tempo. A dissertação investiga possibilidades para

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Lara, Maria Fernanda Espinel. "Estudo numérico bidimensional com aplicação de constructal design para otimização da geometria e da profundidade de submersão de um dispositivo conversor de ondas do mar tipo coluna d'água oscilante." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/117786.

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O presente trabalho tem como objetivo maximizar a potência hidropneumática convertida num dispositivo do tipo Coluna d'Água Oscilante (CAO). Para fazê-lo, o método Constructal Design é aplicado para aprimorar a geometria e a profundidade de submersão do dispositivo. No desenvolvimento do método Constructal são propostos e analisados três graus de liberdade: H1/L (razão entre a altura e comprimento da câmara do dispositivo CAO), H2/l (razão entre a altura da câmara e o comprimento da chaminé) e H3 (profundidade de submersão do dispositivo CAO). As restrições do problema (parâmetros constantes)

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Bevilacqua, Giovanna. "Analisi sperimentale delle forze agenti sul dispositivo di conversione di energia da onda "Wave Dragon" in condizioni ondose estreme del Mare del Nord." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/2051/.

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Per natura, i dispositivi di conversione di energia da onda (WECs) vengono collocati in aree caratterizzate da onde ad elevato potenziale e in queste condizioni i carichi che agiscono su tali dispositivi sono, sfortunatamente, molto alti e, allo stesso tempo, molto difficili da valutare a priori. Allo stato attuale, nessuna delle tecnologie proposte ha raggiunto uno stadio di sviluppo tale da consentire la produzione dei WECs a scala reale e, quindi, il lancio nel mercato principalmente perchè nessuna di esse può contare su un numero suciente di dati operativi da permettere un'analisi sistema

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Ghasemi, Negareh. "Improving ultrasound excitation systems using a flexible power supply with adjustable voltage and frequency to drive piezoelectric transducers." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/61091/1/Negareh_Ghasemi_Thesis.pdf.

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The ability of a piezoelectric transducer in energy conversion is rapidly expanding in several applications. Some of the industrial applications for which a high power ultrasound transducer can be used are surface cleaning, water treatment, plastic welding and food sterilization. Also, a high power ultrasound transducer plays a great role in biomedical applications such as diagnostic and therapeutic applications. An ultrasound transducer is usually applied to convert electrical energy to mechanical energy and vice versa. In some high power ultrasound system, ultrasound transducers are applied

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