Hydrodynamic performance of a novel WEC-breakwater integrated system consisting of triple dual-freedom pontoons

Guo, Baoming; Wang, Rongquan; Ning, Dezhi; Chen, Li Fen; Sulisz, Wojciech

doi:10.1016/j.energy.2020.118463

Cited by 18 publications

(7 citation statements)

References 26 publications

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“…Most recent indicative examples are those of [7][8][9][10] studying integrated WECs into bottom mounted breakwaters, whereas floating integrated WEC-breakwater systems were recently studied in [11][12][13][14]. In addition, floating WEC-breakwaters consisting of rectangular caissons and multiple pontoons have been investigated in [15][16][17]. Regarding WECs located in front of a linear vertical wall and particularly OWC devices considered either alone in the wave field or as part of an array, recent studies [18,19] have shown the amplification of the devices' efficiency due to the presence of a vane-type breakwater.…”

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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“…There have been a number of instances of WEC technology being integrated into either pre-existing coastline infrastructures or newly-built coastal protection systems [360,574,626,320,119,868,183,102,867]. In some cases, the WEC devices have also been built on naturally-formed shoreline features [544].…”

Section: Integration With Pre-existing and Planned Infrastructurementioning

confidence: 99%

Modelling and Optimisation of Wave Energy Converters

Ning¹,

Ding²

2022

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“…Their experimental results indicate that the efficiency of ShoWED could reach up to 26% by making use of the reflected waves from the breakwater. Similarly, Ning et al [28][29][30], Zhao et al [31] and Guo et al [32] studied an integrated system with a floating breakwater and an OB-type WEC in heave motion. It was found that the capture width ratio (CWR) of the integrated system may reach up to 24%, while the transmission coefficient was kept lower than 0.5 [28].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the present hybrid system is favourable in practical applications because of its dual purpose for protecting coastal infrastructure, such as small craft harbours or marinas and extracting wave power at the same time. Furthermore, previous studies [15,31,32] have focused on WEC-breakwater with single, dual and multiple pontoons with little interactions with each other. Unlike these studies, multiple pontoons in this study are closer to each other, so that the interaction between wave and pontoons is more complicated and not well understood.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of a triple pontoon wave energy converter and breakwater hybrid system

Peng

Zhang

Zou

et al. 2021

IET Renewable Power Gen

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In this paper, a novel hybrid wave energy converter (WEC)-floating breakwater system consisting of three floating pontoons with power take-off (PTO) modules is developed to extract wave energy from heave motion and attenuate waves to protect the coast. Unlike previous studies of this subject, the present three pontoons are in close proximity so that they may share the same foundation to reduce the cost further and both pontoons with step change drafts and same drafts are investigated. A systematic experimental study was carried out in a wave flume to examine the hydrodynamic characteristics of the hybrid system under regular waves. The experimental results are used to assess the influences of the WEC-breakwater integration and the configuration of pontoons on the hydrodynamic performance of the hybrid system as a WEC and a breakwater. It was found that the integration of multiple energy-extracting pontoons is robust in smoothing out the power output fluctuations, and the floating pontoons with same drafts gave arise to higher energy conversion efficiency while the floating pontoons with step change drafts are more effective in attenuating wave energy. A parametric analysis is able to identify the balanced performance of the system as a WEC and a breakwater.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Hydrodynamic performance of a novel WEC-breakwater integrated system consisting of triple dual-freedom pontoons

Cited by 18 publications

References 26 publications

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

Modelling and Optimisation of Wave Energy Converters

Experimental investigation of a triple pontoon wave energy converter and breakwater hybrid system

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