A Parametric Study of Wave Energy Converter Layouts in Real Wave Models

Ocean wave energy is a broadly accessible renewable energy source; however, it is not fully developed. Further studies on wave energy converter (WEC) technologies are required in order to achieve more commercial developments. In this study, four CETO6 spherical WEC arrangements have been investigated, in which a fully submerged spherical converter is modelled. The numerical model is applied using linear potential theory, frequency-domain analysis, and irregular wave scenario. We investigate a parametric study of the distance influence between WECs and the effect of rotation regarding significant wave direction in each arrangement compared to the pre-defined layout. Moreover, we perform a numerical landscape analysis using a grid search technique to validate the best-found power output of the layout in real wave models of four locations on the southern Australian coast. The results specify the prominent role of the distance between WECs, along with the relative angle of the layout to dominant wave direction, in harnessing more power from the waves. Furthermore, it is observed that a rise in the number of WECs contributed to an increase in the optimum distance between converters. Consequently, the maximum exploited power from each buoy array has been found, indicating the optimum values of the distance between buoys in different real wave scenarios and the relative angle of the designed layout with respect to the dominant in-site wave direction.

[1]  Alessandro Romagnoli,et al.  Energy storage technologies as techno-economic parameters for master-planning and optimal dispatch in smart multi energy systems , 2019, Applied Energy.

[2]  A. Clément,et al.  Wave energy in Europe: current status and perspectives , 2002 .

[3]  Feng Gao,et al.  Design of the wave energy converter array to achieve constructive effects , 2016 .

[4]  C. M. Linton,et al.  RADIATION AND DIFFRACTION OF WATER WAVES BY A SUBMERGED SPHERE IN FINITE DEPTH , 1991 .

[5]  C. Guedes Soares,et al.  Oil-hydraulic power take-off concept for an oscillating wave surge converter , 2020 .

[6]  M. Simon.  Multiple scattering in arrays of axisymmetric wave-energy devices. Part 1. A matrix method using a plane-wave approximation , 1982 .

[7]  Mounir Ayadi,et al.  Water cycle algorithm–based airflow control for oscillating water column–based wave energy converters , 2020, J. Syst. Control. Eng..

[8]  K. Budal.  Theory for Absorption of Wave Power by a System of Interacting Bodies , 1977 .

[9]  Hong-Wei Fang,et al.  Optimization of Wave Energy Converter Arrays by an Improved Differential Evolution Algorithm , 2018, Energies.

[10]  Bryony DuPont,et al.  Wave energy converter array optimization: A genetic algorithm approach and minimum separation distance study , 2018, Ocean Engineering.

[11]  Malin Göteman,et al.  Optimizing wave energy parks with over 1000 interacting point-absorbers using an approximate analytical method , 2015 .

[12]  Alain H. Clément,et al.  On the numerical modeling and optimization of a bottom-referenced heave-buoy array of wave energy converters , 2017 .

[13]  Xugang Hua,et al.  Prediction and optimization of oscillating wave surge converter using machine learning techniques , 2020 .

[14]  Malin Göteman,et al.  Methods of reducing power fluctuations in wave energy parks , 2014 .

[15]  Alessandro Antonini,et al.  Wave energy farm design in real wave climates: the Italian offshore , 2017 .

[16]  Henry Jeffrey,et al.  Techno-Economic Related Metrics for a Wave Energy Converters Feasibility Assessment , 2016 .

[17]  Markus Wagner,et al.  A Hybrid Cooperative Co-evolution Algorithm Framework for Optimising Power Take Off and Placements of Wave Energy Converters , 2020, Inf. Sci..

[18]  D. Evans.  A theory for wave-power absorption by oscillating bodies , 1976, Journal of Fluid Mechanics.

[19]  Claudio A. Rodríguez,et al.  Hydrodynamic optimization of the geometry of a sloped-motion wave energy converter , 2020 .

[20]  Aurélien Babarit,et al.  Impact of wave interactions effects on energy absorption in large arrays of wave energy converters , 2012 .

[21]  Inigo J. Losada,et al.  Factors that influence array layout on wave energy farms , 2014 .

[22]  Nataliia Y. Sergiienko,et al.  A New Bi-Level Optimisation Framework for Optimising a Multi-Mode Wave Energy Converter Design: A Case Study for the Marettimo Island, Mediterranean Sea , 2020 .

[23]  I. Anagnostopoulos,et al.  Modelling of operation and optimum design of a wave power take-off system with energy storage , 2020 .

[24]  Mohammad-Reza Alam,et al.  Shape optimization of wave energy converters for broadband directional incident waves , 2018, Ocean Engineering.

[25]  Malin Göteman,et al.  Layout design of wave energy parks by a genetic algorithm , 2018 .

[26]  Malin Göteman,et al.  Economical layout optimization of wave energy parks clustered in electrical subsystems , 2020 .

[27]  Ossama Abdelkhalik,et al.  Optimization of dimensions and layout of an array of wave energy converters , 2019, Ocean Engineering.

[29]  Markus Wagner,et al.  New insights into position optimisation of wave energy converters using hybrid local search , 2020, Swarm Evol. Comput..

[30]  Joaquín Izquierdo,et al.  Layout Optimization Process to Minimize the Cost of Energy of an Offshore Floating Hybrid Wind–Wave Farm , 2020 .

[31]  Markus Wagner,et al.  Optimisation of large wave farms using a multi-strategy evolutionary framework , 2020, GECCO.

[32]  R. C. Ertekin,et al.  Wave power calculations for a wave energy conversion device connected to a drogue , 2014 .

[33]  Aurélien Babarit,et al.  On the park effect in arrays of oscillating wave energy converters , 2013 .

[34]  Maziar Arjomandi,et al.  Performance comparison of the floating and fully submerged quasi-point absorber wave energy converters , 2017 .

[35]  Malin Göteman,et al.  Fast Modeling of Large Wave Energy Farms Using Interaction Distance Cut-Off , 2015 .

[36]  Miguel Ortega-Sánchez,et al.  Towards an optimum design of wave energy converter arrays through an integrated approach of life cycle performance and operational capacity , 2018 .

[37]  D. Evans,et al.  Arrays of three-dimensional wave-energy absorbers , 1981 .

[38]  Ossama Abdelkhalik,et al.  Optimization of nonlinear wave energy converters , 2018 .

[39]  M. Leijon,et al.  Performance of large arrays of point absorbing direct-driven wave energy converters , 2013 .

[40]  Markus Wagner,et al.  A hybrid evolutionary algorithm framework for optimising power take off and placements of wave energy converters , 2019, GECCO.

[41]  Maziar Arjomandi,et al.  An optimal arrangement of mooring lines for the three-tether submerged point-absorbing wave energy converter , 2016 .

[42]  António F.O. Falcão,et al.  Wave energy utilization: A review of the technologies , 2010 .

[43]  Lamberto Tronchin,et al.  Energy analytics for supporting built environment decarbonisation , 2019 .