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Showing 1 to 18 of 18 for “"point absorber"”.
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Laboratory scale modelling of a point absorber wave energy converter
… The work describes 1:50 scale tests of a generic point absorber device, restricted to heave motions only. The model set-up is not intended to replicate any existing WEC device but rather to provide a good case study for examining performance characteristics such as exciting forces, response …
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Optimization of the geometry of axisymmetric point-absorber wave energy converters
Wave energy represents an abundant source of renewable energy, but as yet the potential is not fully utilized. Aiming to exploit this vast potential, many theoretical, experimental and pilot-scale studies have been conducted on wave energy converters (WECs), however as yet there has been no …
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Reinforcement learning based control for arrays of point absorber wave energy converters
… a review of and background material relating to point absorber wave energy converters. These are devices that have small dimensions compared to the incident wavelength, and are axisymmetric in design. In most cases, energy is primarily associated with heave motion. A standard point absorber …
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Design, validation and application of wave-to-wire models for heaving point absorber wave energy converters
Ocean waves represent an untapped source of renewable energy which can significantly contribute to the energy transition towards a sustainable energy mix. Despite the significant potential of this energy source and the multiple solutions suggested for the extraction of energy from ocean waves, some …
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Design, Analysis and Testing of a Self-reactive Wave Energy Point Absorber with Mechanical Power Take-off
… a self-reactive two-body wave energy point absorber that is embedded with a novel PTO using the unique mechanism of Mechanical Motion Rectifier (MMR) is investigated through design, analysis and testing to improve the energy harvesting efficiency and the reliability of the PTO. The MMR …
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Boat-shaped Buoy Optimization of an Ocean Wave Energy Converter Using Neural Networks and Genetic Algorithms
The point absorber is one of the most popular types of ocean wave energy converter (WEC) that harvests energy from the ocean. Often such a WEC is deployed in an ocean location with tidal currents or ocean streams, or serves as a mobile platform to power the blue economy. The shape of the floating …
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Application of the latching control on a wave energy converter
… the optimum dimensions of a control-free point absorber wave energy converter (WEC). The methodology is based on frequency domain simulation of the WEC oscillations and a statistical analysis method called “design of experiment” (DOE). Then, using the preliminary results, an approach based …
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Mechanical Motion Rectifier Based Single and Hybrid Input Marine Energy Harvester Analysis, Design and Basin Test Validation
Point absorber style marine energy harvesters have been investigated based on their structure, energy harvesting efficiency, and reliability along with costs. However, due to the continuously varying ocean conditions and climates, the system usually suffers low power output and reliability from low …
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Hydrodynamic Design Optimization and Wave Tank Testing of Self-Reacting Two-Body Wave Energy Converter
… techniques. In this thesis, a two-body 'point absorber' type wave energy converter with a mechanical power-takeoff is investigated. The two-body wave energy converter extracts energy through the relative motion of a floating buoy and a neutrally buoyant submerged body. Using a linear …
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Conceptual design of wave energy converters
… energy converter into an equivalent single body absorber, or canonical form, through the systematic application of Thévenin’s theorem. Once the canonical form for a WEC has been established, criteria originally derived to maximize power capture in single body absorbers is then applied. Through …
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Fluid-Structure Interaction Modeling of a Flexible-Inflatable Heaving Wave Energy Converter Through Generalized Modes
The point absorber, one of the most popular types of ocean wave energy converter (WEC), usually consists of a rigid body buoy that can be efficiently modeled using existing WEC simulation tools. However, new wave energy technologies have looked to utilize flexible buoy structures to decrease costs, …
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Performance Analysis and Tank Test Validation of a Hybrid Wave-Current Energy Converter with a Single Power Takeoff
… baseline tests of a turbine and a two-body point absorber, each acting in isolation, are conducted. Experimental results validate the dynamic modeling and show that a HWCEC can increase the output power with a range between 29-87 percent over either current turbine and wave energy converter …
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A harmonic balance framework for the numerical simulation of non-linear wave energy converter models in random seas
… comprising a flap-type WEC, a spherical heaving point-absorber, an array of four cylindrical heaving point-absorbers, and a pitching device. For each case, it is shown how the HB settings (simulation duration and cut-off frequency) can be calibrated. The accuracy of the HB method is assessed …
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Modelling and Control of Tubular Linear Generators for Wave-Power Applications
… to be coupled directly to the motion of a point-absorber or float, eliminating the need for potentially complex mechanical/hydraulic intermediate stages which are often required for designs based on rotary generators. This decreases system complexity / maintenance requirements and increases …
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The development of a real-time wave energy device control algorithm based on artificial neural network
… smart controller is incorporated into a heaving-point absorber to maximize the energy absorption. It is shown that the energy absorption is indeed increased substantially even if the wave forces are predicted. It indicates that the real-time controller is applicable in the real practice. Besides, …
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From concept definition to full-scale demonstration of a novel hybrid single buoy wave energy converter to produce electricity and fresh water
L'abstract è presente nell'allegato / the abstract is in the attachment
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Model, Design, and Control for Power Conversion in Wave Energy Converter System
… in the time and frequency domains based on a point absorber type of WEC with a power take-off (PTO). The results show that the developed model gives an accurate dynamic prediction for a WEC under both regular and irregular conditions. Along with the PTO model, the circuit-based W2W model is …
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Dynamics of Pitching Wave Energy Converter with Resonant U-Tank Power Extraction Device
This research revolves around the concept design and theoretical validation of a new type of wave energy converter (WEC), comprising a pitching floater integrated with a resonant U-tank (RUT) and a Wells turbine as power take-off (PTO). Theoretical formulation of a fully coupled multi-body dynamic …