Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Power Take-off"”.
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Design, Analysis and Testing of a Self-reactive Wave Energy Point Absorber with Mechanical Power Take-off
… beings. The total theoretical potential wave power on the ocean-facing coastlines of the world is around 30,000 TWh, although cannot all be adopted for generating electricity, the amount of the power can be absorbed still can occupy a large portion of the world's total energy consumption. …
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Co-design Investigation and Optimization of an Oscillating-Surge Wave Energy Converter
… of subsystems such as the geometry, power take-off, and controls is necessary. A codesign optimization in this paper seeks to include effects of all subsystems within one optimization loop in order to reach a fully optimal design for an oscillating-surge wave energy converter. A width …
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Linear generators for direct drive marine renewable energy converters
… development of linear generators for use as the power take off mechanism in marine renewable energy converters. Delivering significant power at the low velocities demanded by wave and tidal stream energy converters requires a large force, which must be reacted by an electrical machine in a direct …
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Design, validation and application of wave-to-wire models for heaving point absorber wave energy converters
… wave-structure hydrodynamic interaction and power take-off system), known as wave-to-wire models, are crucial in the development of successful wave energy converters. Hence, a comprehensive literature review of the different mathematical approaches suggested for modelling the different …
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Model, Design, and Control for Power Conversion in Wave Energy Converter System
… motion consists of a wave energy converter and a power take-off (PTO). A wave energy converter, usually a floating buoy, absorbs the hydrodynamic motion from wave and generates a mechanical oscillation. A power take-off (PTO) with mechanical transmission, which harvests the electrical energy …
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OSCILLATING SURGE WAVE ENERGY CONVERTER GEOMETRY OPTIMIZATION FOR DIRECT SEAWATER DESALINATION
… (OSWEC) geometries and their effects on the power output. The performance of the OSWEC was tested using different flap shapes in addition to different configurations of thickness, density, and center of mass. The tested wave conditions were based on scaled down wave conditions at Jennette's …
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Wave energy converter design via a time-domain Rankine panel method
… device's dynamic, which ultimately leads to the power extraction. This is specially true for wave energy converters (WEC), which usually present a high cost per kWh generated. In this thesis a particular WEC which uses a rotating mass for power extraction is studied. A numerical model for the …
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Dynamics of Pitching Wave Energy Converter with Resonant U-Tank Power Extraction Device
… a resonant U-tank (RUT) and a Wells turbine as power take-off (PTO). Theoretical formulation of a fully coupled multi-body dynamic system, incorporating the thermodynamic processes of the RUT air chamber, its interaction with the PTO dynamics and their coupling with the floater is presented. …
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Numerical investigation of the performance of WEC integrated with vertical wall using CFD
… changing climate, the imperative to harness power from the ocean becomes increasingly apparent. In this thesis, Wave Energy Converters (WECs) assume a pivotal role, and researchers have undertaken extensive investigations into various methodologies aimed at optimizing their efficiency. The …
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Mechanical Motion Rectifier Based Single and Hybrid Input Marine Energy Harvester Analysis, Design and Basin Test Validation
… and climates, the system usually suffers low power output and reliability from low input and high Peak to Average Ratio (PAR). Therefore, a Mechanical Motion Rectifier (MMR) based point absorber is introduced in this thesis to promote the harvesting efficiency and reduce the PAR by unifying …
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An investigation of the physical parameters of PTO entanglements
<p>Power take-off (PTO) drivelines are a commonly recognized hazard of agricultural work environments. Manufacturers commonly shield PTOs to try to prevent operators from coming in contact with rotating PTO shafts. Despite the efforts of manufacturers and educators, PTO entanglements are still a …
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Laboratory scale modelling of a point absorber wave energy converter
Finding an effective Power Take Off (PTO) system, that can deal with the low power levels (< 1W), associated with laboratory scale testing of Wave Energy Converts (WEC) is a notoriously difficult problem. This thesis investigates the use a magnetic particle brake to address the issue. The work …
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Optimal control of wave energy converters
… for which the literature (and the market) offer a large number of standard algorithms (and software packages). It is shown, in this thesis, that direct transcription gives the possibility of formulating complex control problems where realistic scenarios can be taken into account, such as …
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Energy storage systems for wave energy converters and microgrids
… storage systems that are inherently part of the power take-off mechanism. The benefits of electrical energy storage systems for wave energy converters are then outlined as well as the key parameters required from them. The options for storage systems are investigated and the reasons for examining …
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Quasi-Monte Carlo and Picard Iteration Algorithms for the Nonlinear Hydrodynamics, Dynamics and Controls of Wave Energy Converters
… from WECs by optimizing nonlinearities in the power take off (PTO) mechanism, controls, and, more recently, geometry, while often assuming linear hydrodynamics and small body motions. Yet, in the most energetic sea states, large WEC motions and hydrodynamic nonlinearities may become …
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Modeling and Control of a Multibody Hinge-BargeWave Energy Converter
… motion between each pair of bodies drives a Power Take-Off (PTO) system, which extracts the energy from the waves. The objective of this thesis is to increase the energy that can be extracted by a three-body hinge-barge WEC using an optimal control strategy, which computes the optimal loads …
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The development of a real-time wave energy device control algorithm based on artificial neural network
… investigated in this thesis. A non-linear PTO (power take-off) system with two oblique springs is proposed. The PTO system is either monostable or bistable depending on the initial configuration of the oblique springs. Correspondingly, a single-well potential or a double-well potential is …