Numerical and experimental analysis of the power output of a point absorber wave energy converter in irregular waves

Rahmati, Mohammad and Aggidis, George Athanasios (2016) Numerical and experimental analysis of the power output of a point absorber wave energy converter in irregular waves. Ocean Engineering, 111. pp. 483-492. ISSN 0029-8018

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Abstract

This paper examines the optimum power output of a pitching-surge point absorber wave energy converter in irregular wave climates. A mathematical model based on frequency domain is used as the first step to estimate the hydrodynamic parameters of the device and its potential power output in realistic sea waves. The numerical results predict that the point absorber energy converter has the potential to absorb more energy than what is contained in its own geometrical width. The optimum power of the device is then obtained from wave tank experiments in irregular wave climates. The comparison of numerical and experimental results demonstrates that the frequency domain method based on linear theory will lead to an overestimation of the energy absorption for this device. The frequency domain method provides an upper estimate for wave energy absorption due to the non-linear, viscous effects and constrained amplitude of device oscillation. However, comparison of the performance of the device with other point absorber wave energy converters shows that this wave energy converter is one of the most efficient in terms of absorbing wave energy.

Item Type:
Journal Article
Journal or Publication Title:
Ocean Engineering
Additional Information:
This is the author’s version of a work that was accepted for publication in Ocean Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ocean Engineering, 111, 2015 DOI: 10.1016/j.oceaneng.2015.11.011
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2305
Subjects:
ID Code:
78612
Deposited By:
Deposited On:
10 May 2016 08:18
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Mar 2020 04:27