Shape optimisation of floating wave energy converters for a specified wave energy spectrum

Goggins, Jamie; Finnegan, William

doi:10.1016/j.renene.2014.05.022

Cited by 119 publications

(69 citation statements)

References 9 publications

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“…The measured wave records are taken over a half hour time frame and three records are used in the analysis. Data recorded over two years at AMETS is used in the case study analysis discussed in Goggins and Finnegan [20].…”

Section: Methodsmentioning

confidence: 99%

Linear irregular wave generation in a numerical wave tank

Finnegan

Goggins

2015

Applied Ocean Research

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In the design of any floating or fixed marine structure, it is vital to test models in order to understand the fluid/structure interaction involved. A relatively inexpensive method, compared to physical model testing, of achieving this is to numerically model the structure and the wave conditions in a numerical wave tank. In this paper, a methodology for accurately replicating measured ocean waves in a numerical model at full scale is detailed. A Fourier analysis of the measured record allows the wave to be defined as a summation of linear waves and, therefore, Airy's linear wave theory may be used to input the wave elevation and associated water particle velocities. Furthermore, a structure is introduced into the model to display the ability of the model to accurately predict wave-structure interaction. A case study of three individual measured waves, which are recorded at the Atlantic marine energy test site, off the west coast of Ireland, is also presented. The accuracy of the model to replicate the measured waves and perform wave-structure interaction is found to be very high. Additionally, the absolute water particle velocity profile below the wave from the numerical model is compared to a filtered analytical approximation of the measured wave at a number of time steps and is in very good agreement.

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Section: Methodsmentioning

confidence: 99%

Linear irregular wave generation in a numerical wave tank

Finnegan

Goggins

2015

Applied Ocean Research

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“…The Lagrange multipliers theory Equation (15) is applied to solve it. The expressions Equations (16) and (17) show the FPTO module and phase values that maximize Pelec. The restriction in the PTO force module does not affect the optimum PTO phase value Equation (17): …”

Section: Pto Control Strategymentioning

confidence: 99%

“…The design algorithm is addressed as a numerical optimization problem in previous works found in the literature [14][15][16][17][18][19], including approaches such as the economic analysis of the whole design of a WEC, the dimensioning of particular equipment, the optimization of the complete water contact surface and the WEC dimensions optimization in order to take advantage of pitch movement.…”

Section: Introductionmentioning

confidence: 99%

Design Parameters Analysis of Point Absorber WEC via an evolutionary-algorithm-based Dimensioning Tool

et al. 2015

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Abstract:Wave energy conversion has an essential difference from other renewable energies since the dependence between the devices design and the energy resource is stronger. Dimensioning is therefore considered a key stage when a design project of Wave Energy Converters (WEC) is undertaken. Location, WEC concept, Power Take-Off (PTO) type, control strategy and hydrodynamic resonance considerations are some of the critical aspects to take into account to achieve a good performance. The paper proposes an automatic dimensioning methodology to be accomplished at the initial design project stages and the following elements are described to carry out the study: an optimization design algorithm, its objective functions and restrictions, a PTO model, as well as a procedure to evaluate the WEC energy production. After that, a parametric analysis is included considering different combinations of the key parameters previously introduced. A variety of study cases are analysed from the point of view of energy production for different design-parameters and all of them are compared with a reference case. Finally, a discussion is presented based on the results obtained, and some recommendations to face the WEC design stage are given.

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“…Soulard [10] (2009) conducted the research works to create models and optimize the geometric of a two-body oscillating system, in which, a floating body forces against a submerged body through a linear power takeoff system and force reacting principle can be used. Goggins et al [11] (2014) further developed this model by changing the geometry of floating oscillating absorber, optimized its hydrodynamic performance, and studied an unstrained WEC system. The offshore engineering groups, such as Chakrabarti et al [12] (1983), Eatock Taylor et al [13] , (1983); Ran and Kim [14] (1995), studied vertical cylinders pivoted at the sea floor to articulated tower platform.…”

Section: Introductionmentioning

confidence: 99%