Waves, currents, tides—problems and prospects

Voß, Alfred

doi:10.1016/0360-5442(79)90014-8

Cited by 11 publications

(4 citation statements)

References 3 publications

(2 reference statements)

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“…The reason is that when we have directional spreading two waves of the same frequency may superimpose at the location of the device, but the extracted energy cannot be linearly superimposed as the contribution of phase-differences become of leading order importance. 5 Specifically, power absorption under monochromatic directional incident waves (wave climate ii) is given by (see Appendix I)…”

Section: Shape Optimization Methodologymentioning

confidence: 99%

“…Oceanic surface waves carry a much higher energy density, sometimes by two orders of magnitude, than wind and solar. Estimates show that ocean wave energy can realistically provide about 10% of world's electricity need [1][2][3][4][5]. This potential, along with proximity to load centers that are typically along coastal areas, as well as good predictability and power consistency makes wave energy an appealing solution to avoid archaic pollutant-rich energy production methods [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Shape optimization of wave energy converters for broadband directional incident waves

Esmaeilzadeh

Alam

2019

Ocean Engineering

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Here, through a systematic methodology and the use of high performance computing, we calculate the optimum shape for a wave energy converter under the action of incident waves of (i) monochromatic unidirectional, (ii) monochromatic directional, (iii) polychromatic unidirectional and (iv) polychromatic directional (with both directional symmetry and asymmetry). As a benchmark for our study, without loss of generality, we consider a submerged planar pressure differential wave energy converter, and use Genetic Algorithm to search through a wide range of shapes. A new parametric description of absorber shape based on Fourier decomposition of geometrical shapes is introduced, and for each shape hydrodynamic coefficients are calculated, optimum power take-off parameters are obtained, and overall efficiency is determined. We show that an optimum geometry of the absorber plate can absorb a significantly higher energy (in some cases few times higher) when compared to a circular shape of the same area. Specifically, for a unidirectional incident wave, the optimum shape, as expected, is obtained to be the most elongated shape. For directional incident waves, a butterfly-shape is the optimum geometry whose details depend on not only the amplitude and direction of incident wave components, but also the relative phases of those components. For the latter effect, we find an optimally averaged profile through a statistical analysis.

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Section: Shape Optimization Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shape optimization of wave energy converters for broadband directional incident waves

Esmaeilzadeh

Alam

2019

Ocean Engineering

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“…In the revised paper we have included new references to papers in Energy including material by Lund and Helpklund (2012), and Voss (1979).…”

Section: Response To Referee 3 the Regional Employment Returns From Mmentioning

confidence: 99%

“…In examining the employment potential from marine renewables, the focus is on tidal stream and wave-based electricity technology in Wales (UK) an area long recognised as having a major resource (Voss, 1979). While these technologies are at an early commercial stage, it is important to consider how the structure of the evolving industry might determine regional employment and economic returns.…”

Section: Introductionmentioning

confidence: 99%

The regional employment returns from wave and tidal energy: A Welsh analysis

Fanning¹,

Jones²,

Munday³

2014

Energy

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The paper examines the expected regional employment returns connected to the development of tidal stream and wave-based electricity generation in a UK region-Wales. New employment provides economic development opportunities and the paper demonstrates that there is a need to develop the evidence base on these regional employment impacts. It addresses how far a region which is adjacent to significant marine resources is likely to benefit from a change in the energy generation mix which could feature more wave and tidal stream technologies.

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