Detailed Design of a Wave Energy Conversion Plant

Retief, G. de F.; Muller, F.P.J.; Prestedge, Gordon K.; Geustyn, L.C.; Swart, D.H.

doi:10.9753/icce.v19.171

Cited by 3 publications

(1 citation statement)

References 1 publication

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“…Pioneering works on the wave effects on V-shaped breakwaters are [30][31][32][33]. Concerning the investigations on the behavior of WECs placed in front of V-shaped breakwaters, theoretical and experimental studies were developed in [34,35], whereas the effect of a sea-bottom fixed orthogonal breakwater on the hydrodynamics of bottom seated or floating cylindrical bodies has been studied in [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Efficiency of a Wave Energy Converter in Front of an Orthogonal Breakwater

Konispoliatis

Mavrakos

2021

JMSE

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In the present study, the hydrodynamic efficiency of a cylindrical wave energy converter (WEC) of vertical symmetry axis and arranged in front of a reflecting orthogonal breakwater is explored. The idea is based on exploiting the anticipated amplification of the scattered and the reflected wave fields originating from the presence of the vertical walls, towards increasing the WEC’s wave power absorption due to the walls’ wave reflections. Two types of converters are examined, namely the heaving device and the oscillating water column (OWC) device, assuming linear potential theory. The associated diffraction-, motion-, and pressure-radiation problems are solved using axisymmetric eigenfunction expansions for the velocity potential around the WECs by properly accounting for the wave field’s modification due to the walls’ presence. To this end, a theoretical formulation dealing with the evaluation of the converter’s performance is presented accounting for the coupling between the WEC and the reflecting vertical walls. The results depict that the amount of the harvested wave power by the WEC in front of an orthogonal wall is amplified compared to the absorbed wave power by the same WEC in the open sea.

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Section: Introductionmentioning

confidence: 99%

Hydrodynamic Efficiency of a Wave Energy Converter in Front of an Orthogonal Breakwater

Konispoliatis

Mavrakos

2021

JMSE

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Comparison of the Experimental and Numerical Results of Modelling a 32-Oscillating Water Column (OWC), V-Shaped Floating Wave Energy Converter

Kelly

Dooley

Campbell³

et al. 2013

Energies

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Combining offshore wind and wave energy converting apparatuses presents a number of potentially advantageous synergies. To facilitate the development of a proposed floating platform combining these two technologies, proof of concept scale model testing on the wave energy converting component of this platform has been conducted. The wave energy component is based on the well-established concept of the oscillating water column. A numerical model of this component has been developed in the frequency domain, and the work presented here concerns the results of this modelling and testing. The results of both are compared to assess the validity and usefulness of the numerical model. Keywords: wave energy; oscillating water column; tank testing; modelling; passive control Nomenclature:A ∈ R DoF ×DoF = Frequency-dependent added mass matrix (kg). Z ∈ R DoF ×DoF = Complex impedance matrix.

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Theoretical Analysis of a Vertical Cylindrical Floater in Front of an Orthogonal Breakwater

Konispoliatis

Mavrakos

2020

Fluids

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This study investigates the effect of an orthogonal-shaped reflecting breakwater on the hydrodynamic characteristics of a vertical cylindrical body. The reflecting walls are placed behind the body, which can be conceived as a floater for wave energy absorption. Linear potential theory is assumed, and the associated diffraction and motion radiation problems are solved in the frequency domain. Axisymmetric eigenfunction expansions of the velocity potential are introduced into properly defined ring-shaped fluid regions surrounding the floater. The hydrodynamic interaction phenomena between the body and the adjacent breakwaters are exactly taken into account by using the method of images. Results are presented and discussed concerning the exciting wave forces on the floater and its hydrodynamic coefficients, concluding that the hydrodynamics of a vertical cylindrical body in front of an orthogonally shaped breakwater differ from those in unbounded waters.

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Detailed Design of a Wave Energy Conversion Plant

Cited by 3 publications

References 1 publication

Hydrodynamic Efficiency of a Wave Energy Converter in Front of an Orthogonal Breakwater

Hydrodynamic Efficiency of a Wave Energy Converter in Front of an Orthogonal Breakwater

Comparison of the Experimental and Numerical Results of Modelling a 32-Oscillating Water Column (OWC), V-Shaped Floating Wave Energy Converter

Theoretical Analysis of a Vertical Cylindrical Floater in Front of an Orthogonal Breakwater

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