Performance of optimally tuned arrays of heaving point absorbers

Sinha, Ashank; Karmakar, D.; Soares, C. Guedes

doi:10.1016/j.renene.2016.02.043

Cited by 48 publications

(20 citation statements)

References 16 publications

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“…Several commercial (Lee, 1995;AQWA, 2013) and open-source BEM software packages (Babarit and Delhommeau, 2015) exist. BEM software has also been coupled to wave propagation models such as MILDwave or OceanWave3D to study the perturbed wave field in a larger ocean area with varying bathymetry (Verbrugghe et al, 2017;Verao Fernández et al, 2018, 2019 and are further developed and used extensively to model the hydrodynamical interaction in wave energy parks (Sinha et al, 2016;Ruiz et al, 2017;Tay and Venugopal, 2017;Bosma et al, 2019;Lyu et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

“…Three different array layouts and three different separation distances were analyzed for life-cycle performance by López-Ruiz et al (2018a) (see Figure 3). Five different array layouts consisting of 12 WECs were compared by Sinha et al (2016) (see Figure 4), and their performance in sea states with different incident wave directions was studied. Several array layouts were compared for two-body heaving WECs by De Andrés et al (2014).…”

Section: Comparing Distinctive Configurationsmentioning

confidence: 99%

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Advances and Challenges in Wave Energy Park Optimization—A Review

et al. 2020

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A commercial wave energy system will typically consist of many interacting wave energy converters installed in a park. The performance of the park depends on many parameters such as array layout and number of devices, and may be evaluated based on different measures such as energy absorption, electricity quality, or cost of the produced electricity. As wave energy is currently at the stage where several large-scale installations are being planned, optimizing the park performance is an active research area, with many important contributions in the past few years. Here, this research is reviewed, with a focus on identifying the current state of the art, analyzing how realistic, reliable, and relevant the methods and the results are, and outlining directions for future research.

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Section: Methodsmentioning

confidence: 99%

Section: Comparing Distinctive Configurationsmentioning

confidence: 99%

Advances and Challenges in Wave Energy Park Optimization—A Review

et al. 2020

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“…A new utility scale of the two-body point absorber WEC was recently tested by OPT at Invergordon, Scotland. In a twobody point absorber WEC, energy is extracted from waves through the relative displacement between the buoy and submerged body in heave motion (Beatty et al 2015;Liang and Zuo 2017;Sinha et al 2016;Guedes Soares et al 2014). Falnes and Perlin (2003) investigated the feasibility of applying the relative motion between two bodies to capture wave energy.…”

Section: Introductionmentioning

confidence: 99%

Performance of Two Types of Mooring Systems in the Heave Motion of a Two-body Floating Wave Energy Converter

Berenjkoob

Ghiasi

Soares

2019

J. Marine. Sci. Appl.

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This work investigated the influence of two types of mooring systems on the hydrodynamic performance of a two-body floating wave energy converter (WEC). It also investigated the effects of the physical parameters of the mooring system on the amount of extractable power from incident waves in the frequency domain. The modeled converter comprised a floating body (a buoy), a submerged body with two mooring systems, and a coupling system for two bodies. The coupling system was a simplified power takeoff system that was modeled by a linear spring-damper model. The tension leg mooring system could drastically affect the heave motion of the submerged body of the model and increase relative displacement between the two bodies. The effects of the stiffness parameter of the mooring system on power absorption exceeded those of the pretension tendon force. Keywords Two-body WEC. Three-point mooring. Wave energy. Tension-leg mooring system. Mooring parameters Article Highlights • Two types of mooring systems, which are tension leg mooring (TLM) and three-point taut mooring (TPM) systems, are applied to the model and compared their effect on the WEC model efficiency. • The TLM system showed outstanding performance in increasing the relative heave displacement between the two bodies of the model compared to the TPM system. • The effect of the TLM system on the absorbed power was more remarkable than that of the TPM system. • The parameter of mooring lines stiffness can improve the hydrodynamic performance of the model and raise the absorption efficiency of the model compared to the pretension parameter of tendons.

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“…However, much current work on arrays of wave energy converters (WECs) is restricted by virtue of the large computational costs to rather few devices, e.g. Child and Venugopal (2010) consider 5 WECs, Borgarino et al (2012) between 9 and 25 WECs, Sinha et al (2016) 12 WECs, and Folley and Whittaker (2009) 2 WECs, respectively in their arrays. Various methods may be employed to reduce these computational costs, with a recent approach by Göteman et al (2015b) enabling an analysis of arrays of more than 1000 heaving point absorbers by neglecting the interaction due to scattered waves, and in a later study (Göteman et al, 2015a) by introducing a cut-off distance for the interaction.…”

Section: Introductionmentioning

confidence: 99%

Harnessing wave power in open seas II: very large arrays of wave-energy converters for 2D sea states

Stuhlmeier

Stiassnie

2017

J. Ocean Eng. Mar. Energy

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Recently Stiassnie et al (2016) studied the potential for capturing wave-energy over a large ocean basin via a toy model of a wave-farm attacked by unidirectional wave fields. In the present work, we develop an approach to model macroscopically the behaviour of sparse arrays consisting of infinite rows of floating, axisymmetric wave energy converters in deep water. This approximate framework allows for such arrays to be characterized by frequency and direction dependent transfer functions. The example of a self-reacting converter consisting of vertically floating, coaxial cylinders moving in three modes of motion is discussed in detail, and the performance of large arrays of such devices, attacked by directional JONSWAP spectra and taking into account wave-growth by the wind is investigated. This allows for fast and flexible estimates of power absorption by arrays as well as of their effects on the wave field.

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Performance of optimally tuned arrays of heaving point absorbers

Cited by 48 publications

References 16 publications

Advances and Challenges in Wave Energy Park Optimization—A Review

Advances and Challenges in Wave Energy Park Optimization—A Review

Performance of Two Types of Mooring Systems in the Heave Motion of a Two-body Floating Wave Energy Converter

Harnessing wave power in open seas II: very large arrays of wave-energy converters for 2D sea states

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