Journal ArticleDOI
Wave power conversion by point absorbers - A Norwegian project
Kjell Budal,Johannes Falnes +1 more
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TLDR
In this article, the authors describe a spherical buoy, which can perform heaving oscillation relative to a strut joined to an anchor on the sea bed for power take-off.Abstract:
SYNOPSIS This paper describes a spherical buoy, which can perform heaving oscillation relative to a strut joined to an anchor on the sea bed. The buoy is supplied with latching means for optimum phase control and with an air turbine for power take-off. The electrical generator is rated at 0.4 MW. An estimate is given for the cost of a 200 MW power plant and for its annual energy production if placed off the west coast of Norway. The estimated electricity cost is approximately 4 p/kWh. At the present stage of the research, it is consequently not competitive with hydroelectric power plants in Norway. However. There are several options for cost reduction of a powerbuoy plant.read more
Citations
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Journal ArticleDOI
A review of wave-energy extraction
TL;DR: In this paper, wave spectrum parameters related to transport, distribution and variability of wave energy in the sea are explained. But, the authors do not consider the effect of wave interference on the performance of wave-energy converters.
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Oscillating-water-column wave energy converters and air turbines: A review
TL;DR: A comprehensive review of wave energy converters and air turbines can be found in this paper, together with a survey of theoretical, numerical and experimental modelling techniques of OWC converters.
Journal ArticleDOI
Comparison of latching control strategies for a heaving wave energy device in random sea
TL;DR: In this paper, the authors investigated semi-analytically the latching control applied to a mechanical oscillator; and numerically three strategies of latching controlling for a point absorber wave energy converter oscillating in the heave mode only.
Journal Article
Optimum Control of Oscillation of Wave-Energy Converters
TL;DR: In this article, an upper bound is given to the ratio between the converted power from a given wave, and the geometrical volume of the converter, where one control strategy is based on measuring the incident wave, whereas another strategy utilises measurement of the WEC's own oscillation as input to the controller.
Journal ArticleDOI
Nearshore oscillating wave surge converters and the development of Oyster.
Trevor Whittaker,Matt Folley +1 more
TL;DR: Nearshore OWSCs are serious contenders in the mix of wave power technologies, and Aquamarine Power's 315 kW Oyster 1 prototype is described, which was deployed at the European Marine Energy Centre in August 2009.
References
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Journal ArticleDOI
A theory for wave-power absorption by oscillating bodies
TL;DR: In this paper, a theory for predicting the absorption of the power in an incident sinusoidal wave train by means of a damped, oscillating, partly or completely submerged body is given.
Journal ArticleDOI
A resonant point absorber of ocean-wave power
K. Budar,Johannes Falnes +1 more
TL;DR: In this article, large scale systems have been proposed for absorbing and utilising the energy carried by ocean waves, which are called point absorbers and linear absorbers, respectively, when the system is made as a straight construction, at least a few wavelengths long.
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Theory for Absorption of Wave Power by a System of Interacting Bodies
TL;DR: In this paper, a general expression for the wave power absorbed by the system, in terms of far field velocity potentials, is derived, and the optimum power absorption by a system of identical bodies from a plane incident wave is obtained.
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Power From Water Waves
TL;DR: A review of wave energy devices and hydrodynamic properties of idealized equipment for extracting power from waves is presented in this paper, where the governing equations involve fluid hydrodynamics applied to machines with zero forward speed which can absorb energy from the neighboring wave field.