© The Institution of Engineering and Technology
The ability of a wave energy converter to capture the energy of ocean waves has been studied in offshore experiments. This study covers 50 days during which the converter was subjected to ocean waves over a wide range of frequencies and amplitudes as well as three different electrical loads. The results present the wave energy converter's energy absorption as a function of significant wave height, energy period and electrical load. It is shown that the power generated overall continues to increase with wave amplitude, whereas the relative absorption decreases towards the highest periods and amplitudes. The absorption reached a maximum of approximately 24% with the used combination of buoy, generator and electrical load. Absorption to cover for iron and mechanical losses has not been included. A brief study of the nature of the electromagnetic damping force has also been included in the study. The wave energy converter is of the technology that is being researched at Uppsala University and experimented on off the Swedish west coast at the Lysekil wave energy research site.
References
-
-
1)
-
B. Drew ,
A.R. Plummer ,
M.N. Sahinkaya
.
Proc. Inst. Mech. Eng. Part A: J. Power Energy.
Proc. Inst. Mech. Eng. Part A: J. Power Energy
,
887 -
902
-
2)
-
Washio, Y., Osawa, H., Ogata, T.: `The open sea tests of the offshore floating type wave power device ‘Mighty Whale’ – characteristics of wave energy absorption and power generation', MTS/IEEE Oceans 2001. An Ocean Odyssey. Conf. Proc. (IEEE Cat. No.01CH37295), 2001, 1, p. 579–585.
-
3)
-
E. Callaway
.
To catch a wave.
Nature
,
156 -
159
-
4)
-
R. Waters ,
M. Ståhlberg ,
O. Danielsson
.
Experimental results from sea trials of an offshore wave energy system.
Appl. Phys. Lett.
,
34105
-
5)
-
D. Elwood ,
S.C. Yim ,
J. Prudell
.
Design, construction, and ocean testing of a taut-moored dual-body wave energy convertor with a linear generator power take off.
Renew. Energy
,
2 ,
348 -
354
-
6)
-
M. Stålberg ,
R. Waters ,
O. Danielsson ,
M. Leijon
.
Influence of generator damping on peak power and variance of power for a direct drive wave energy converter.
J. Ocean Mech. Arct. Eng.
,
3 ,
031003 -
031001
-
7)
-
M. Eriksson ,
R. Waters ,
O. Svensson ,
J. Isberg ,
M. Leijon
.
Wave power absorption: experiments in open sea and simulation.
J. Appl. Phys.
,
84910
-
8)
-
Hagerman, G., Bedard, R.: `Guidelines for preliminary estimation of power production by offshore wave energy conversion devices', E2I EPRI – WP – US – 001, Report, 2003.
-
9)
-
J. Falnes
.
(2002)
Ocean waves and oscillating systems.
-
10)
-
H. Polinder ,
M.E.C. Damen ,
F. Gardner
.
Design, modelling and test results of the AWS PM linear generator.
Eur. Trans. Electr. Power
,
3 ,
245 -
256
-
11)
-
Elwood, D., Schacher, A., Rhinefrank, K.: Proc. ASME 28th Int. Conf. Ocean, Offshore and Arctic Engineering, OMAE2009, 31 May–5 June 2009, Honolulu, Hawaii, USA.
-
12)
-
Frigaard, P., Kofoed, J.P., Rasmussen, M.R.: Proc. 14th Annual Int. Offshore and Polar Engineering Conf., ISOPE, 2004, Toulon, France.
-
13)
-
L.J. Duckers
.
Wave energy; crests and troughs.
Renew. Energy
,
2 ,
1444 -
1452
-
14)
-
A.F.O. Falcão
.
Wave energy utilization: a review of the technologies.
Renew. Sustain. Energy Rev.
,
3 ,
899 -
918
-
15)
-
J. Engström ,
M. Eriksson ,
J. Isberg ,
M. Leijon
.
Wave energy convertor with enhanced amplitude response at frequencies coinciding with Swedish west coast sea states by use of a supplementary submerged body.
J. Appl. Phys.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-rpg.2010.0124
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