3D hydrodynamic modelling of fixed oscillating water column wave power plant by a boundary element methods

Delauré, Yan; Lewis, Anthony

doi:10.1016/s0029-8018(02)00032-x

Cited by 101 publications

(32 citation statements)

References 3 publications

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“…This important distinction between the monochromatic and polychromatic capture widths should not be forgotten. The distinction has been noted by some researchers, for example Delauré and Lewis [3], who described them as the steady state and spectral efficiencies. To our knowledge we are the first to show (40) how these capture widths are related to one another.…”

Section: Device Property: Monochromatic Capture Widthmentioning

confidence: 99%

On the capture width of wave energy converters

Price

Dent

Wallace

2009

Applied Ocean Research

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThis paper extends the theory on capture width, a commonly used performance indicator for a wave energy converter (WEC). The capture width of a linear WEC is shown to depend on two properties: the spectral power fraction (a property introduced in this paper), which depends entirely on the sea-state, and the monochromatic capture width, which is determined by the geometry of the WEC and the chosen power take off (PTO) coefficients. Each of these properties is examined in detail. Capture width is shown to be a measure of how well these two properties coincide. Their interaction confirms accepted practices in the design of WECs. A study of the effects of PTO control on the capture width suggests that geometry control, a form of control that has not been the focus of much academic research, despite its use in the wave energy industry, deserves more attention. The distinction between PTO control and geometry control is outlined. While capture width is a valuable design tool, its limitations must be recognised. The assumptions made in the formulation of capture width are listed, and its limitations as a tool for estimating annual power capture of a WEC are discussed.

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Section: Device Property: Monochromatic Capture Widthmentioning

confidence: 99%

On the capture width of wave energy converters

Price

Dent

Wallace

2009

Applied Ocean Research

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“…Most of the modeling of OWCs involving PTO assume the applicability of linear wave theory [16,[34][35][36]. As Cruz [40] pointed out, linear wave based hydrodynamic analysis shouldn't be interpreted as a severe deficiency in preliminary modeling; the device must perform most efficiently in small waves.…”

Section: Hydrodynamics For Oscillation Water Column (Owc)mentioning

confidence: 99%

“…The energy converting unit, known as power take-off (PTO) is the key part in the OWEC to convert the wave kinetic energy into electricity. PTOs have various forms such as hydraulic [12,13], linear generator [14], air-driven turbine [15,16], hose pump [17], etc. A recent innovation of mechanical motion rectifier (MMR) which can convert the bidirectional oscillatory motion to unidirectional rotation [18] may be extended to ocean wave PTO to enhance the efficiency, reliability and compactness of the OWECs.…”

mentioning

confidence: 99%

Dynamics and control of ocean wave energy converters

Xie

Zuo

2013

Int. J. Dynam. Control

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Ocean wave technology is one of the most exciting areas due to vast but untapped energy potential worldwide. Technologies on ocean wave harvesting energy have been explored for centuries and are still undergoing with challenges. This paper provides a comprehensive literature review on the progress of classical and modern control strategies, including latching control, declutch control, reactive control, model predictive control, state space control, etc. For three major types of ocean wave energy converters (OWECs), i.e. oscillating-body wave energy converter (including point absorber, attenuator and terminator), oscillating water column and overtopping device. It also introduces the nature of ocean waves, mathematical models of ocean wave energy and the hydrodynamics of the representative OWECs.

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“…To harvest the wave energy, various types of WECs have been proposed. Although it may cause noise pollution and damage the natural beauty of a seascape, featured by high efficiency and structure simplicity, the OWC device becomes one of the most favorable wave energy converters [2]. The feasibility of OWCs has been studied recently in a low energetic sea [3].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of a Dual-Chamber Oscillating Water Column Wave Energy Converter

2017

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Abstract:The performance of a dual-chamber Oscillating Water Column (OWC) Wave Energy Converter (WEC) is considered in the present study. The device has two sub-chambers with a shared orifice. A two-dimensional (2D) fully nonlinear numerical wave flume based on the potential-flow theory and the time-domain higher-order boundary element method (HOBEM) is applied for the simulation. The incident waves are generated by using the immerged sources and the air-fluid coupling influence is considered with a simplified pneumatic model. In the present study, the variation of the surface elevation and the water column volume in the two sub-chambers are investigated. The effects of the chamber geometry (i.e., the draft and breadth of two chambers) on the surface elevation and the air pressure in the chamber are investigated, respectively. It is demonstrated that the surface elevations in the two sub-chambers are strongly dependent on the wave conditions. The larger the wavelength, the more synchronous motion of the two water columns in the two sub-chambers, thus, the lager the variation of the water column volume.

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3D hydrodynamic modelling of fixed oscillating water column wave power plant by a boundary element methods

Cited by 101 publications

References 3 publications

On the capture width of wave energy converters

On the capture width of wave energy converters

Dynamics and control of ocean wave energy converters

Numerical Simulation of a Dual-Chamber Oscillating Water Column Wave Energy Converter

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