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Design and testing of a free floating dual flap wave energy converter

Journal Article · · Energy
 [1];  [1];  [1];  [1];  [2];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Oregon State Univ., Corvallis, OR (United States)
+ Show Author Affiliations
With a wide variety of wave energy device archetypes currently under consideration, it is a major challenge to ensure that research findings and methods are broadly applicable. In particular, the design and testing of wave energy control systems, a process which includes experimental design, empirical modeling, control design, and performance evaluation, is of interest. This goal motivated the redesign and testing of a floating dual flap wave energy converter. As summarized in this paper, the steps taken in the design, testing, and analysis of the device mirrored those previously demonstrated on a three-degree of freedom point absorber device. The method proposed does not require locking WEC degrees of freedom to develop an excitation model, and presents a more attainable system identification procedure for at-sea deployments. The results show that the methods employed work well for this dual flap device, lending additional support for the broad applicability of the design and testing methods applied here. The aim of this paper is to demonstrate that these models are particularly useful for deducing areas of device design or controller implementation that can be reasonably improved to increase device power capture.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
NA0003525
OSTI ID:
1834089
Alternate ID(s):
OSTI ID: 23204688
Report Number(s):
SAND--2020-6982J; 687215
Journal Information:
Energy, Journal Name: Energy Vol. 241; ISSN 0360-5442
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (12)

On short-crested waves: experimental and analytical investigations journal September 1999
On a near-optimal control approach for a wave energy converter in irregular waves journal June 2014
Effect of non-ideal power take-off on the energy absorption of a reactively controlled one degree of freedom wave energy converter journal October 2014
Wave tank and bench-top control testing of a wave energy converter journal May 2019
Considering linear generator copper losses on model predictive control for a point absorber wave energy converter journal February 2014
Laboratory experiment on heaving body with hydraulic power take-off and latching control journal May 2006
Non-linear numerical modeling and experimental testing of a point absorber wave energy converter journal March 2014
Linear parametric hydrodynamic models for ocean wave energy converters identified from numerical wave tank experiments journal July 2015
Experimental and numerical comparisons of a dual-flap floating oscillating surge wave energy converter in regular waves journal January 2020
Increases in the average power output of wave energy converters using quiescent period predictive control journal December 2010
Wave power journal June 1974
System Identification of a Heaving Point Absorber: Design of Experiment and Device Modeling journal April 2017

Figures / Tables (18)

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Related Subjects

16 TIDAL AND WAVE POWER
feedback control
frequency domain
system identification
wave energy