This paper presents an innovative technique for evaluating the performance of direct-drive power take-off systems for wave energy devices using simulated force and velocity profiles. The performance of a linear generator was evaluated in a realistic operating condition using the results from a coupled model of a taut moored, dual body, and wave energy conversion system as position input for Oregon State University’s wave energy linear test bed. The experimental results from the linear test bed can be compared with the predictions of the simulation and used to evaluate the efficiency of the generator.
Issue Section:
Ocean Engineering
1.
2.
Evans
, D. V.
, 1976, “A Theory for Wave-Energy Absorption by Oscillating Bodies
,” J. Fluid Mech.
0022-1120, 77
, pp. 1
–25
.3.
Evans
, D. V.
, 1979, “Some Theoretical Aspects of Three Dimensional Wave Energy Absorbers
,” Proceedings of the First Symposium on Wave Energy Utilization
, Chalmers University of Technology, Gothenburg, Sweden, pp. 77
–106
.4.
Budar
, K.
, and Falnes
, J.
, 1975, “A Resonant Point Absorber of Ocean-Wave Power
,” Nature (London)
0028-0836, 256
, pp. 478
–479
.5.
Budal
, K.
, 1977, “Theory for Absorption of Wave Power by a System of Interacting Bodies
,” Journal of Ship Research
, 21
, pp. 248
–253
. 0002-78206.
Falnes
, J.
, 2002, Ocean Waves and Oscillating Systems
, Cambridge University Press
, Cambridge, UK
.7.
Newman
, J. N.
, 1979, “Absorption of Wave Energy by Elongated Bodies
,” Appl. Ocean Res.
, 1
, pp. 189
–196
.8.
Newman
, J. N.
, 1977, Marine Hydrodynamics
, MIT Press
, Cambridge, MA
.9.
Mei
, C. C.
, 1976, “Power Extraction From Water Waves
,” Journal of Ship Research
, 20
, pp. 63
–66
.10.
Salter
, S. H.
, Jeffery
, D. C.
, and Taylor
, J. R. M.
, 1976, The Architecture of Nodding Duck Wave Power Generators
, Royal Institution of Naval Architects
, London
.11.
Curran
, R.
, and Gato
, L. M. C.
, 1997, “The Energy Conversion Performance of Several Types of Wells Turbine Designs
,” Proceedings of the Institute of Mechanical Engineers
pp. 133
–145
.12.
WaveGen, 2008, Jun 6, http://www/wavegen.co.ukhttp://www/wavegen.co.uk
13.
2008, Pelamis Wave Power, Jun 6, http://www.pelamiswave.comhttp://www.pelamiswave.com
14.
2008, Archimedes Wave Swing, Jun 6, http://awsocean.com/http://awsocean.com/
15.
Ocean Power Technologies, 2008, Jun 6, http://www.oceanpowertechnologies.com/http://www.oceanpowertechnologies.com/
16.
Prudell
, J. H.
, 2007, “Novel Design and Implementation of a Permanent Magnet Linear Tubular Generator for Wave Energy Conversion
,” MS thesis, Oregon State University, Corvallis, OR.17.
2006,
OrcaFlex Manual
, Orcina Ltd.
, Daltongate, UK
.18.
Chung
, J.
, and Hulbert
, G. M.
, 1993, “A Time Integration Algorithm for Structural Dynamics With Improved Numerical Dissipation: The Generalized-Alpha Method
,” ASME J. Appl. Mech.
0021-8936, 60
, pp. 371
–375
.19.
Chung
, J. S.
, 1994, “Added Mass and Damping of an Oscillating Surface-Piercing Circular Column With a Circular Footing
,” Int. J. Offshore Polar Eng.
1053-5381, 4
, pp. 11
–17
.20.
Bhatta
, D.
, 2007, “Computation of Added Mass and Damping Coefficients Due to a Heaving Cylinder
,” Journal of Applied Mathematics and Computing
, 23
pp. 127
–140
. 0002-782021.
Elwood
, D.
, Amon
, E.
, Yim
, S.
, von Jouanne
, A.
, and Brekken
, T. K. A.
, 2010, “Experimental Force Characterization and Numerical Modeling of a Taut-Moored Dual-Body Wave Energy Converter
,” ASME J. Offshore Mech. Arct. Eng.
0892-7219, 132
, (1
), p. 011102
.22.
Elwood
, D.
, Prudell
, J.
, Stillinger
, C.
, Brown
, A.
, Yim
, S.
, von Jouanne
, A.
, Brekken
, T.
, and Paasch
, R.
, 2010, “Design, Construction, and Ocean Testing of a Taut-Moored Dual-Body Wave Energy Converter With a Linear Generator Power Take-Off
,” Renewable Energy
0960-1481, 35
, (2
), pp. 348
–354
.23.
NOAA, 2008, National Data Buoy Center, Jun 6, http://www.ndbc.noaa.gov/http://www.ndbc.noaa.gov/
24.
Mavrakos
, S. A.
, 2004, “Hydrodynamic Coefficients in Heave of Two Concentric Surface-Piercing Truncated Circular Cylinders
,” Appl. Ocean Res.
, 26
, pp. 84
–97
.Copyright © 2011
by American Society of Mechanical Engineers
You do not currently have access to this content.