The ability of a Cycloidal Wave Energy Converter (CycWEC) to cancel irregular deep ocean waves is investigated in a time integrated, inviscid potential flow simulation. A CycWEC consists of one or more hydrofoils attached eccentrically to a shaft that is aligned parallel to the incoming waves. The entire device is fully submerged in operation. A Bretschneider spectrum with 40 discrete components is used to model an irregular wave environment in the simulations. A sensor placed up-wave of the CycWEC measures the incoming wave height and provides a signal for the wave state estimator, a non-causal Hilbert transformation, to estimate the instantaneous frequency, phase and amplitude of the irregular wave pattern. A linear control scheme which proportionally controls hydrofoil pitch and compensates for phase delays is adopted. Efficiency for the design Bretschneider spectrum shows more than 99% efficiency, while non-optimum, off design operating conditions still maintain more than 85% efficiency. These results are in agreement with concurrent experimental results obtained at a 1:300 scale.
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ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
July 1–6, 2012
Rio de Janeiro, Brazil
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4494-6
PROCEEDINGS PAPER
Computational Investigation of Irregular Wave Cancelation Using a Cycloidal Wave Energy Converter Available to Purchase
Casey P. Fagley,
Casey P. Fagley
Atargis Energy Corporation, Colorado Springs, CO
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Jürgen J. Seidel,
Jürgen J. Seidel
Atargis Energy Corporation, Colorado Springs, CO
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Stefan G. Siegel
Stefan G. Siegel
Atargis Energy Corporation, Colorado Springs, CO
Search for other works by this author on:
Casey P. Fagley
Atargis Energy Corporation, Colorado Springs, CO
Jürgen J. Seidel
Atargis Energy Corporation, Colorado Springs, CO
Stefan G. Siegel
Atargis Energy Corporation, Colorado Springs, CO
Paper No:
OMAE2012-83434, pp. 351-358; 8 pages
Published Online:
August 23, 2013
Citation
Fagley, CP, Seidel, JJ, & Siegel, SG. "Computational Investigation of Irregular Wave Cancelation Using a Cycloidal Wave Energy Converter." Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. Volume 7: Ocean Space Utilization; Ocean Renewable Energy. Rio de Janeiro, Brazil. July 1–6, 2012. pp. 351-358. ASME. https://doi.org/10.1115/OMAE2012-83434
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