Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30579
Near Shore Wave Manipulation for Electricity Generation

Authors: K. D. R. Jagath-Kumara, D. D. Dias


The sea waves carry thousands of GWs of power globally. Although there are a number of different approaches to harness offshore energy, they are likely to be expensive, practically challenging, and vulnerable to storms. Therefore, this paper considers using the near shore waves for generating mechanical and electrical power. It introduces two new approaches, the wave manipulation and using a variable duct turbine, for intercepting very wide wave fronts and coping with the fluctuations of the wave height and the sea level, respectively. The first approach effectively allows capturing much more energy yet with a much narrower turbine rotor. The second approach allows using a rotor with a smaller radius but captures energy of higher wave fronts at higher sea levels yet preventing it from totally submerging. To illustrate the effectiveness of the first approach, the paper contains a description and the simulation results of a scale model of a wave manipulator. Then, it includes the results of testing a physical model of the manipulator and a single duct, axial flow turbine in a wave flume in the laboratory. The paper also includes comparisons of theoretical predictions, simulation results, and wave flume tests with respect to the incident energy, loss in wave manipulation, minimal loss, brake torque, and the angular velocity.

Keywords: Renewable Energy, near-shore sea waves, wave manipulation, Wave energy conversion

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1587


[1] Global wave statistics, BMT fluid mechanics Limited,, 2011.
[2] Ocean wave climate, Fugro OCEANOR,, 2014.
[3] S. Barstow, G. Mørk, L. Lønseth, J. P. Mathisen, “WorldWaves wave energy resource assessments from the deep ocean to the coast,” in Proc. 8th European Wave and Tidal Energy Conf., Uppsala, Sweden, 2009, pp. 149-159.
[4] G. Mørk, S. Barstow, A. Kabuth, M. T. Pontes, “Assessing the global wave energy potential,” in Proc. 29th International Conf. on Ocean, Offshore Mechanics and Arctic Engineering (OMAE), Shanghai, China., 2010.
[6] B. Thanatheepan, S. Gobinath, K. D. R. Jagath Kumara., “A case study on near shore wave energy utilization in the coastal regions of Sri Lanka,” in Proc. National Energy symposium 2013, BMICH, Colombo, Sri Lanka, 2013, pp. 56-71.
[7] S. D. K. Maliyadda, W. M. C. R. Wijeratne, S. R. L. M. Zoysa, D. D. Dias, K. D. R. Jagath-Kumara, “Wave manipulation for near shore wave energy utilization,” in Proc. National Energy Symposium, BMICH, Colombo, Sri Lanka, 2014, pp. 94-104.
[8] S. D. K. Maliyadda, W. M. C. R. Wijeratne, S. R. L. M. Zoysa, D. D. Dias, K. D. R. Jagath-Kumara, “Manipulation of near-shore sea waves for electricity generation: modelling a wave concentrator,” in Proc. 5th International Conference on Sustainable Built Environment, ICSBE 2014, Kandy, Sri Lanka, vol. 3, 2014, pp. 206-216.
[9] Galle surf and wind quality by month (West, Sri Lanka),, 2014.
[10] G. Iglesias, R. Carballo, “Wave energy and near-shore hot spots: The case of the SE bay of Biscay,” Renewable Energy, vol. 35, issue 11, pp. 2490-2500, Nov. 2010.
[11] J. Morim, N. Cartwright, A. Etemad-Shahidi, D. Strauss, M. Hemer, “A review of wave energy estimates for nearshore shelf waters of Australia,” International Journal of Marine Energy, vol. 7, pp. 57-70, Sept. 2014.
[12] M. Veigas, V. Ramos, G. Iglesias, “A wave farm for an island: Detailed effects on the nearshore wave climate,” Energy, vol. 69, pp. 801-812, May 2014.
[13] Proceedings of the Hydrokinetic and Wave Energy Technologies, Technology and Environmental Issues Workshop, Washington D. C., 26 – 28 Oct. 2005.
[14] M. J. Khan, G. Bhuyan, M. T. Iqbal, J. E. Quaicoe, “Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications: A technology status review,” Elsevier Journal of Applied Energy, vol. 86, issue 10, pp. 1823- 1835, 2009.
[15] S. L. Ortega-Achury, W. H. McAnally, T. E. Davis, J. L. Martin, “Hydrokinetic Power Review,” Civil and Environmental Engineering, James Worth Bagley College of Engineering, Mississippi State University, 2 Apr. 2010.
[16] J. M. Robertson, Hydrodynamics in Theory and Application. Englewood Cliffs, NJ: Prentice-Hall, 1965, pp. 548-559.
[21] A. Furukawa, S. Watanabe, K. Okuma, “Research on Darrieus type hydraulic turbine for extra low-head hydro power utilization,” in IOP Conf. Series: Earth and Environmental Science, vol. 15, part 1, 2012.
[22] f.
[24] T. R. Akylas, C. C. Mei, “Forced dispersive waves along a narrow channel,” MIT Open Courseware - Modules on waves in Fluids, Massachusetts Institute of Technology, ch. 6, 2001-2014.
[25] P. Chang, W. K. Melville, J. W. Miles, “On the evolution of a solitary wave in a gradually varying channel,” Journal of Fluid Mechanics, vol. 95, part 3, pp. 401-414, 1979.
[26] User_Manual.pdf/.