Comparison Between Numerical Modeling and Experimental Testing of a Point Absorber WEC Using Linear Power Take-Off System

Andrew Stephen Zurkinden, Morten Kramer, Mahdi Teimouri Sichani, Marco Alves

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

10 Citationer (Scopus)

Abstrakt

Currently, a number of wave energy converters are being analyzed by means of numerical models in order to predict the electrical power generation under given wave conditions. A common characteristic of this procedure is to integrate the loadings from the hydrodynamics, power take-off and mooring systems into a central wave to wire model. The power production then depends on the control strategy which is applied to the device. The objective of this paper is to develop numerical methods for motion analysis of marine structures with a special emphasis on wave energy converters. Two different time domain models are applied to a point absorber system working in pitch mode only. The device is similar to the well-known Wavestar prototype located in the Danish North Sea. A laboratory model has been set up in order to validate the numerical simulations of the dynamics. Wave Excitation force and the response of the device for regular and irregular waves were measured. Good correspondence is found between the numerical and the physical model for relatively mild wave conditions. For higher waves the numerical model seems to underestimate the response of the device due to its linear fluidstructure interaction assumption and linearized equation of motion. The region over which the numerical model is valid will be presented in terms of non-dimensional parameters describing the different wave states.
OriginalsprogEngelsk
TitelProceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering : OMAE2012
Antal sider10
UdgivelsesstedRio de Janeiro
ForlagAmerican Society of Mechanical Engineers
Publikationsdato2012
StatusUdgivet - 2012
Begivenhed31st International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2012) - , Brasilien
Varighed: 1 jul. 20126 jul. 2012

Konference

Konference31st International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2012)
LandBrasilien
Periode01/07/201206/07/2012

Bibliografisk note

The conference proceedings is published on a DVD

Emneord

  • Numerical Methods
  • Marine Structures
  • Analysis
  • Wave Energy Converters

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