Modelling of hydraulic performance and wave energy extraction by a point absorber in heave

Vantorre, Marc; Banasiak, Robert; Verhoeven, Ronny

doi:10.1016/j.apor.2004.08.002

Cited by 158 publications

(82 citation statements)

References 3 publications

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“…The optimization of the resulting power performance of this particular type of Wave Energy Converter (WEC) represents the next step in order to improve the economic sustainability of the project [38]. An interesting study about modelling of hydraulic performance of a Point Absorber and its wave energy extraction is exposed in [39], in which an optimal conversion device is evaluated as rated to a 100 kW. A useful solution in order to convert wave energy into electrical output is represented by the use of linear generators, in which the magnetic field is obtained through Permanent Magnets (PM).…”

Section: Deim Point Absorbermentioning

confidence: 99%

Sustainability of the Renewable Energy Extraction Close to the Mediterranean Islands

Franzitta

Curto

2017

Energies

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Abstract:The aim of this work is to explore the possibility of transitioning a fuel powered island to a renewable powered one. This transition is analyzed for the real MV/LV distribution system of the island of Pantelleria, in the Mediterranean Sea. Particularly, this work is focused on a renewable source nowadays totally unused: wave energy. Thanks to the innovative generator prototype designed by Department of Energy of University of Palermo (Italy), wave energy is able to represent a primary source for the production of electric energy in the Mediterranean islands. The procedures applied in the present article, as well as the main equations used, are the result of previous applications made in different technical fields that show a good replicability.

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Section: Deim Point Absorbermentioning

confidence: 99%

Sustainability of the Renewable Energy Extraction Close to the Mediterranean Islands

Franzitta

Curto

2017

Energies

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“…A linear external damping coefficient, b ext , simulates the PTO. A tuning force proportional to the acceleration has been implemented by means of the term with the supplementary mass, m sup [6]. The introduction of the supplementary mass enables a practical implementation of phase control in a linear model.…”

Section: Pto Control To Decrease Bottom Slammingmentioning

confidence: 99%

Bottom slamming on heaving point absorber wave energy devices

et al. 2010

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Oscillating point absorber buoys may rise out of the water and be subjected to bottom slamming upon reentering the water. Numerical simulations are performed to estimate the power absorption, the impact velocities and the corresponding slamming forces for various slamming constraints. Three buoy shapes are considered: a hemisphere and two conical shapes with deadrise angles of 30°a nd 45°, with a waterline diameter of 5 m. The simulations indicate that the risk of rising out of the water is largely dependent on the buoy draft and sea state. Although associated with power losses, emergence occurrence probabilities can be significantly reduced by adapting the control parameters. The magnitude of the slamming load is severely influenced by the buoy shape. The ratio between the peak impact load on the hemisphere and that on the 45°c one is approximately 2, whereas the power absorption is only 4-8% higher for the 45°cone. This work illustrates the need to include slamming considerations aside from power absorption criteria in the buoy shape design process and the control strategy.

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“…They are also attractive in terms of easy modelling because the scattered wave field can be neglected and forces on the body are only due to incident waves. A series of studies by Falnes and, Evans (1981) [6] French and Bracewell (1986) [7], Pizer (1993) [8], Vantorre et al (2004) [9], Babarit et al (2004) [10] and others have carried out on these devices both in regular and irregular waves. The difficulties lie in wave energy development process is how to achieve efficient and stable conversion.…”

Section: Introductionmentioning

confidence: 99%