scholarly journals A Power Take-Off and Control Strategy in a Test Wave Energy Converter for a Moderate Wave Climate

2016 ◽  
pp. 478-483
Author(s):  
K.L. De Koker ◽  
G. Crevecoeur ◽  
B. Meersman ◽  
M. Vantorre ◽  
L. Vandevelde
Keyword(s):  
Wave Energy ◽  
Control Strategy ◽  
Wave Climate ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
And Control

scholarly journals Modeling of a Heaving Buoy Wave Energy Converter With Stacked Dielectric Elastomer Generator

2014 ◽  
Author(s):  
Giacomo Moretti ◽  
Marco Fontana ◽  
Rocco Vertechy
Keyword(s):  
Wave Energy ◽  
Control Strategies ◽  
Mechanical Energy ◽  
Wave Climate ◽  
Dielectric Elastomer ◽  
Wave Energy Converter ◽  
Climate Data ◽  
Energy Converter ◽  
Design And Optimization ◽  
And Control

This paper introduces a novel architecture of Wave Energy Converter (WEC) provided with a Dielectric Elastomer (DE) Power Take–Off (PTO) system. The device, named Poly–Buoy, includes a heaving buoy as primary interface, that captures the mechanical energy from waves, and a DE Generator (DEG), made by stacked layers of silicone elastomer, that converts mechanical energy into electricity. A mathematical model of the Poly–Buoy is proposed, which includes analytical electro–hyperlastic equations for the DEG and a linear model for wave-buoy hydrodynamics. Procedures for the design and optimization of different layouts and control strategies for the DE–PTO are introduced that specifically consider single–DEG and dual–DEG architectures. A numerical case study is also reported for specific geometrical dimensions of the buoy and specific wave climate data.

scholarly journals Optimizing the Power Take Off of a Wave Energy Converter With Regard to the Wave Climate

2005 ◽  
Vol 128 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Gaelle Duclos ◽  
Aurelien Babarit ◽  
Alain H. Clément
Keyword(s):  
Wave Energy ◽  
Simple Wave ◽  
Wave Climate ◽  
Wave Energy Converter ◽  
Optimal Parameters ◽  
Energy Converter ◽  
Wave Energy Converters ◽  
Classical Wave ◽  
Project Site ◽  
Wave Conditions

Considered as a source of renewable energy, wave is a resource featuring high variability at all time scales. Furthermore wave climate also changes significantly from place to place. Wave energy converters are very often tuned to suit the more frequent significant wave period at the project site. In this paper we show that optimizing the device necessitates accounting for all possible wave conditions weighted by their annual occurrence frequency, as generally given by the classical wave climate scatter diagrams. A generic and very simple wave energy converter is considered here. It is shown how the optimal parameters can be different considering whether all wave conditions are accounted for or not, whether the device is controlled or not, whether the productive motion is limited or not. We also show how they depend on the area where the device is to be deployed, by applying the same method to three sites with very different wave climate.

DESIGN AND CONTROL OF A 50KW CLASS ROTATING BODY TYPE WAVE ENERGY CONVERTER

2011 ◽  
pp. 1216-1223
Author(s):  
BYUNG-HAK CHO ◽  
SHIN-YEOL PARK ◽  
DONG-SOON YANG ◽  
KYUNG-SHIK CHOI ◽  
BYUNG-CHUL PARK
Keyword(s):  
Wave Energy ◽  
Wave Energy Converter ◽  
Body Type ◽  
Energy Converter ◽  
Type Wave ◽  
Rotating Body ◽  
And Control

The Effect of the Spectral Distribution of Wave Energy on the Performance of a Bottom Hinged Flap Type Wave Energy Converter

2012 ◽  
Author(s):  
D. Clabby ◽  
A. Henry ◽  
M. Folley ◽  
T. Whittaker
Keyword(s):  
Energy Distribution ◽  
Wave Height ◽  
Wave Energy ◽  
Spectral Distribution ◽  
Energy Production ◽  
Spectral Energy Distribution ◽  
Wave Climate ◽  
Wave Energy Converter ◽  
Spectral Energy ◽  
Energy Converter

The power output from a wave energy converter is typically predicted using experimental and/or numerical modelling techniques. In order to yield meaningful results the relevant characteristics of the device, together with those of the wave climate must be modelled with sufficient accuracy. The wave climate is commonly described using a scatter table of sea states defined according to parameters related to wave height and period. These sea states are traditionally modelled with the spectral distribution of energy defined according to some empirical formulation. Since the response of most wave energy converters vary at different frequencies of excitation, their performance in a particular sea state may be expected to depend on the choice of spectral shape employed rather than simply the spectral parameters. Estimates of energy production may therefore be affected if the spectral distribution of wave energy at the deployment site is not well modelled. Furthermore, validation of the model may be affected by differences between the observed full scale spectral energy distribution and the spectrum used to model it. This paper investigates the sensitivity of the performance of a bottom hinged flap type wave energy converter to the spectral energy distribution of the incident waves. This is investigated experimentally using a 1:20 scale model of Aquamarine Power’s Oyster wave energy converter, a bottom hinged flap type device situated at the European Marine Energy Centre (EMEC) in approximately 13m water depth. The performance of the model is tested in sea states defined according to the same wave height and period parameters but adhering to different spectral energy distributions. The results of these tests show that power capture is reduced with increasing spectral bandwidth. This result is explored with consideration of the spectral response of the device in irregular wave conditions. The implications of this result are discussed in the context of validation of the model against particular prototype data sets and estimation of annual energy production.

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