Ocean Wave Energy Conversion Case Study

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3) Issues concerning Ocean Wave Energy Conversion:

Some of the issues that may be associated with permitting an ocean wave energy conversion facility include:
• A significant challenge is the conversion of the slow (∼0.1 Hz), random, and high-force oscillatory motion into adequate motion to drive the generator with output quality as in demand. As waves vary in height and period, their respective power levels vary accordingly.
• The challenge of efficiently capturing this irregular motion also has an impact on the design of the device. To operate efficiently, the device and corresponding systems have to be rated for the most common wave power levels.
• The device also has to withstand extreme wave conditions that occur very rarely. Not only
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To date, the focus of the wave energy developers and a considerable amount of the published academic work has been primarily on sea performance and survival, as well as the design and concept of the primary wave interface.
• Disturbance or destruction of marine life (including changes in the distribution and types of marine life near the shore)
• Degradation of scenic ocean front views from wave energy devices located near or on the shore, and from onshore overhead electric transmission lines

4) Why Oscillating Water Column?
There are a number of factors concerned with the installation of the type of ocean wave energy converter. However, the OWC is chosen as one of the optimum measures to tackle the issue of wave energy conversion. The considerations of which are listed below (16):
 There are very few moving parts;
 There are no moving parts in the water;
 The concept is adaptable and can be used on a range of collector forms situated on the coast line, in the near shore region or floating offshore;
 The use of an air turbine eliminates the need for gearboxes;
 It is
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C., and Thorpe, T. Wave energy in Europe: current status and perspectives. Renew. Sust. En-ergy Rev., 2002, 6(5), 405–431.
(3) Dexawave Energy ApS. Dexawave website
(4) Kofoed, J.P., 2009. Hydraulic evaluation of the DEXA wave energy converter. DCE Technical Report No. 57. Dep. of Civil Eng., Aalborg University, 23 pp.
(5) Martinelli L., Zanuttigh, B., Kofoed, J.P., 2009. Statistical analysis of power production from OWC type wave energy converters. EWTEC Conference, Uppsala, 7-11 Sept 2009, electronic format, 9 pp.
(6) Kofoed, J.P. and Frigaard, P., 2008. Hydraulic evaluation of the LEANCON wave energy con-verter. DCE Technical Report No. 45. Dep. of Civil Eng., Aalborg University, Oct. 2008. Lean-con Wave Energy. Leancon website
(7) Embley Energy LTD Sperboy tm website
(8) Boccotti, P., 2003. On a new wave energy absorber. Ocean Engineering, 30, 1191–1200.
(9) Ricerca Italiana Ricerca Italiana on REWEC-3
(10) Wave Dragon ApS Wave Dragon

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