The interaction factor and directionality in wave energy arrays

Wolgamot, Hugh; Taylor, Paul H.; Taylor, R. Eatock

doi:10.1016/j.oceaneng.2012.03.017

Cited by 66 publications

(54 citation statements)

References 10 publications

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“…Other parameters than the ones discussed here are also relevant for the performance of wave energy parks. Some of these, such as the direction of the incoming wave and the local geometry, were approached in a previous paper [12] and have also been discussed elsewhere, e.g., [7,[29][30][31][32][33]. In this paper, we have restricted the study to include global geometries, number of devices, separating distance between devices, and sea states.…”

Section: Discussionmentioning

confidence: 99%

Optimizing wave energy parks with over 1000 interacting point-absorbers using an approximate analytical method

Göteman

Engström

Eriksson

et al. 2015

International Journal of Marine Energy

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PostprintThis is the accepted version of a paper published in International Journal of Marine Energy. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Göteman, M. (2015) Optimizing wave energy parks with over 1000 interacting point-absorbers using an approximate analytical method. Energy, Access to the published version may require subscription. N.B. When citing this work, cite the original published paper. International Journal of Marine AbstractLarge arrays of wave energy converters of point-absorber type are studied using an approximate analytical model. The model is validated against a numerical method that takes into account full hydrodynamic interactions based on linear potential flow theory. The low computational cost of the analytical model enables parameter studies of parks in the MW range and includes up to over 1000 interacting devices. The model is actuated by irregular wave data obtained at the Swedish west coast. In particular, focus is on comparing park geometries and improving park configurations to minimize the power fluctuations.

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Section: Discussionmentioning

confidence: 99%

Optimizing wave energy parks with over 1000 interacting point-absorbers using an approximate analytical method

Göteman

Engström

Eriksson

et al. 2015

International Journal of Marine Energy

View full text Add to dashboard Cite

show abstract

“…Recent studies have shown that for OWSCs such as Oyster, the point absorber limit is no longer applicable and hence better and more accurate modelling of the device needs to be undertaken [6]. Some recent investigations also dealt with a detailed analysis of multiple WECs, but most of them did not go beyond three or four of such devices [7][8][9][10]. Indeed, in the literature, there have been very few attempts to understand the dynamics of large finite arrays.…”

Section: Introductionmentioning

confidence: 99%

Wave farm modelling of oscillating wave surge converters

2014

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A mathematical model is described to analyse the hydrodynamic behaviour of a wave energy farm consisting of oscillating wave surge converters in oblique waves. The method is a highly efficient semianalytical approach based on the linear potential flow theory. Wave farms with a large number of such devices are studied for various configurations. For an inline configuration with normally incident waves, the occurrence of a near-resonant behaviour, already known for small arrays, is confirmed. A strong wave focusing effect is observed in special configurations comprising a large number of devices. The effects of the arrangement and of the distance of separation between the flaps are also studied extensively. In general, the flaps lying on the front of the wave farm are found to exhibit an enhanced performance behaviour in average, owing to the mutual interactions arising within the array. A random sea analysis shows that a slightly staggered arrangement can be an ideal layout for a wave farm of this device. The hydrodynamics of two flaps that oscillate back to back is also discussed.

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“…In [30], it was shown that the interaction factor integrated over all incident wave angles equals unity, implying that if there are destructive interaction factors for some incident wave angles, they must be positive for other angles. An underlying assumption for that computation is that the single devices perform at resonance, so that maximum power is absorbed.…”

Section: Discussionmentioning

confidence: 99%

Fast Modeling of Large Wave Energy Farms Using Interaction Distance Cut-Off

2015

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Abstract:In many wave energy concepts, power output in the MW range requires the simultaneous operation of many wave energy converters. In particular, this is true for small point-absorbers, where a wave energy farm may contain several hundred devices. The total performance of the farm is affected by the hydrodynamic interactions between the individual devices, and reliable tools that can model full farms are needed to study power output and find optimal design parameters. This paper presents a novel method to model the hydrodynamic interactions and power output of very large wave energy farms. The method is based on analytical multiple scattering theory and uses time series of irregular wave amplitudes to compute the instantaneous power of each device. An interaction distance cut-off is introduced to improve the computational cost with acceptable accuracy. As an application of the method, wave energy farms with over 100 devices are studied in the MW range using one month of wave data measured at an off-shore site.

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The interaction factor and directionality in wave energy arrays

Cited by 66 publications

References 10 publications

Optimizing wave energy parks with over 1000 interacting point-absorbers using an approximate analytical method

Optimizing wave energy parks with over 1000 interacting point-absorbers using an approximate analytical method

Wave farm modelling of oscillating wave surge converters

Fast Modeling of Large Wave Energy Farms Using Interaction Distance Cut-Off

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