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http://dx.doi.org/10.5293/kfma.2015.18.3.026

Theatrical Research an Generated Power of Float-Counterweight Wave Converters  

Lee, Sung-Bum (Pusan National University Naval Architecture & Ocean Engineering)
Lee, Seung-Keon (Kunsan National University Department of Naval Architecture)
Moon, Byung-Young (Kunsan National University Department of Naval Architecture)
Publication Information
The KSFM Journal of Fluid Machinery / v.18, no.3, 2015 , pp. 26-32 More about this Journal
Abstract
The authors are developing a motion of floater body type wave energy converter of the float-counterweight system. This consists of the driving pulley, wire, float and counterweight suspended from idler pulleys and rachet mechanism. Though it has succeeded in solving the major structural strength problem in which the floats would slam against adjacent structure(s) by wave load acting horizontally. In order to overcome this problem. We propose a new system in which the wire transmitting the power is wound around the pulleys and the float receiving the wave power is pulled by the wire from both its upper and lower ends to avoid the occurrence of slackening during the wave cycle. In the paper, we developed the dynamics model for the proposed system. Energy gain has been calculated for realistic wave conditions and compared with the original float-counterweight device. The important differences from the float-counterweight system are that (1) both upward and downward motions of water surface can be utilized without problem. (2) slackening of energy gain and wire tension are effectively suppressed, and (4) for the same time averaged energy gain, the maximum wire tension is fairly lowered.
Keywords
Wave Converter; Floating body Motion; Ocean Energy;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 "BP Statistical Review of World Energy", BP, 2009.
2 Evans, D. V., "Wave Power Absorption within a Resonant Harbor," Proc 2nd IntSymp On Wave Energy Utilization, Trendheim, pp. 371-378, 1982.
3 Folley, M., Whittaker, T. and Osterried, M., "The Oscillating Wave Surge Converter," Proc 14th Int Offshore and Polar Eng. Conf., Toulon, CD-ROM, pp. 189-193, 2004.
4 Cruz, J., "Ocean Wave Energy," Springer, 2008.
5 Korean energy Management Corporation, "New & Renewable energy white paper", 2010.
6 Hadano, K., Hashida, M. and Sato, M., "An Attempt to Make High Performance Wave Energy System," Proc 12th Int Offshore and Polar EngConf, Kitakyshu, pp. 556-561, 2002.
7 Hadano, K., Taneura, K., Watanabe, M., Nakano, K., Saito, T. and Matsuura, M., "On the Dynamics of the Float Type Wave Energy Conversion," JSCE Journal B, Vol. 62, No. 3, pp. 270-383, 2006.
8 Hadano, K., Lee, S. B. and Moon, B. Y., Dynamics model of the float-type wave energy converter considering tension force of the float cable, Journal of the Korean Society of Marine Engineering, Vol. 38, No. 2, pp. 217-224, 2014   DOI
9 Hadano, K., Moon, B. Y., Lee, S. B. and Kim, K. J., "The Experimental Study about Kinetic Change of Water Surface in the Chambers for Wave Energy Converter", Jouranl of Korean Society for Fluid machinery, Vol. 17, No. 2, pp. 41-47, 2014
10 Lee, S. B., Hadano K. and Moon, B. Y., "A study for electric power of float-counterweight wave energy converter", Journal of the Korean Society of Marine Engineering, Vol. 38, No. 7, pp. 936-942, 2014.   DOI