Near Shore Wave Manipulation for Electricity Generation
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.
[1] Global wave statistics, BMT fluid mechanics Limited,
http://www.globalwavestatistics.com/Help/comparison.htm/, 2011.
[2] Ocean wave climate, Fugro OCEANOR, http://www.oceanor.com/,
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.
[5] http://uekus.com/.
[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),
http://www.surf-forecast.com/, 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.
[17] http://www.emec.org.uk/marine-energy/wave-devices/.
[18] http://oceanlinx.com/.
[19] http://mysite.du.edu/~jcalvert/tech/fluids/turbine.htm#Impu.
[20] http://www.verdantpower.com/.
[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] http://www.math.le.ac.uk/people/ag153/homepage/gorlovrevisedFish.pd
f.
[23] http://www.engr.psu.edu/mtah/articles/vertical_waterwheel.htm.
[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] http://oss.deltares.nl/documents/183920/185723/Delft3DFLOW_
User_Manual.pdf/.
[1] Global wave statistics, BMT fluid mechanics Limited,
http://www.globalwavestatistics.com/Help/comparison.htm/, 2011.
[2] Ocean wave climate, Fugro OCEANOR, http://www.oceanor.com/,
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.
[5] http://uekus.com/.
[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),
http://www.surf-forecast.com/, 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.
[17] http://www.emec.org.uk/marine-energy/wave-devices/.
[18] http://oceanlinx.com/.
[19] http://mysite.du.edu/~jcalvert/tech/fluids/turbine.htm#Impu.
[20] http://www.verdantpower.com/.
[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] http://www.math.le.ac.uk/people/ag153/homepage/gorlovrevisedFish.pd
f.
[23] http://www.engr.psu.edu/mtah/articles/vertical_waterwheel.htm.
[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] http://oss.deltares.nl/documents/183920/185723/Delft3DFLOW_
User_Manual.pdf/.
@article{"International Journal of Electrical, Electronic and Communication Sciences:70375", author = "K. D. R. Jagath-Kumara and D. D. Dias", title = "Near Shore Wave Manipulation for Electricity Generation", abstract = "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 = "Near-shore sea waves, Renewable energy, Wave
energy conversion, Wave manipulation.", volume = "9", number = "7", pages = "683-10", }
