The power generation of regular water waves from a horizontal-axis single Savonius rotor is experimentally investigated in an experimental wave flume in the context of the performance assessment of the rotor in intermediate-to-shallow water depths for different parametric conditions. A number of prototypes with multiple blades of 3–5 with the same diameter and blade curvature angle are fabricated in-house and tested to measure both the long-term average torque and power generated at different submergence levels, wave heights and wave periods. The experiments are performed in the wave-current flume equipped with a piston-type wave maker with an active wave absorption capability. The energy performance of the rotor is comparatively assessed for each experimental test case based on quantitative comparison of obtained wave-to-mechanical energy conversion efficiency (ECE) to suggest a possible optimum blade number, positioning and wave physical conditions for the investigated range of wave flow characteristics. It is found that higher ECE values can be achieved at higher wave heights and blade numbers for the lower wave periods when the rotor is placed at the water surface and/or just below the surface. This study provides a proper guideline for performance analysis of such device(s) for further studies.

References

1. 1)
  - 3. Masuda, Y.: ‘Wave-activated generator’. Proc. Int. Colloquium Exposition Oceans, France, Bordeaux, France, 1971.
2. 2)
  - 20. Tutar, M., Veci, I.: ‘Performance analysis of a horizontal axis 3-bladed Savonius type wave turbine in an experimental wave flume (EWF)’, Renew. Energy, 2016, 86, pp. 8–25 (doi: 10.1016/j.renene.2015.07.079).
3. 3)
  - 18. Bikas, G.S., Ramesh, H., Vijaykumar, H.: ‘Study on performance of Savonius type wave energy converter used in conjunction conventional rubble mound breakwater’, Ocean Eng., 2014, 89, pp. 62–68 (doi: 10.1016/j.oceaneng.2014.07.015).
4. 4)
  - 1. Khan, J., Bhuyan, G., Iqbal, T., et al: ‘Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications: a technology status review’, Appl. Energy, 2009, 86, (10), pp. 1823–1835 (doi: 10.1016/j.apenergy.2009.02.017).
5. 5)
  - 8. Kamoji, M.A., Kedare, S.B., Prabhu, S.V.: ‘Experimental investigations on single stage modified Savonius rotor’, Appl. Energy, 2009, 86, pp. 1064–1073 (doi: 10.1016/j.apenergy.2008.09.019).
6. 6)
  - 25. Tennant, G.: ‘Six sigma: SPC and TQM in manufacturing and services’ (Gower Publishing, Ltd., 2001), 6.
7. 7)
  - 8. Falnes, J.: ‘A review of wave-energy extraction’, Marine Struct., 2007, 20, (4), pp. 185–201 (doi: 10.1016/j.marstruc.2007.09.001).
8. 8)
  - 2. Sağlam, M., Uyar, T.S.: ‘Wave energy and wave energy technical potential of Turkey, III’. Renewable Energy Sources Symp.-YEKSEM, Mersin, Turkey, 2005, pp. 275–279.
9. 9)
  - 5. McCormick, M.E.: ‘Ocean wave energy conversion’ (Wiley, New York, 1981).
10. 10)
  - 13. Golecha, K., Eldho, T.I., Prabhu, S.V.: ‘Influence of the deflector plate on the performance of Savonius water turbine’, Appl. Energy, 2011, 88, pp. 3207–3217 (doi: 10.1016/j.apenergy.2011.03.025).
11. 11)
  - 24. MINITAB Inc.: 1829 Pine Hall Rd, State College, PA. 16801-3008, Version 17.
12. 12)
  - 6. Ross, D.: ‘Power from sea waves’ (Oxford University Press, Oxford, 1995).
13. 13)
  - 10. Hindasageri, V., Ramesh, H., Kattimani, S.C.: ‘Performance of Savonious rotors for utilizing the orbital motion of ocean waves in shallow waters’, J. Sustain. Energy Environ., 2011, 2, pp. 117–119.
14. 14)
  - 4. Masuda, Y.: ‘Experimental full-scale results of wave power machine Kaimei in 1978’. Proc. First Symp. on Wave Energy Utilization, Gothenburg, Sweden, 1979, pp. 63–349.
15. 15)
  - 15. Mohamed, M.H., Shaaban, S.: ‘Optimization of blade pitch angle of an axial turbine used for wave energy conversion’, Energy, 2011, 56, pp. 229–239 (doi: 10.1016/j.energy.2013.04.035).
16. 16)
  - 12. Ahmed, M.R., Faizal, M., Prasad, K., et al: ‘Exploiting the orbital motion of water particles for energy extraction from waves’, J. Mech. Sci. Technol., 2010, 24, (4), pp. 943–949 (doi: 10.1007/s12206-010-0203-0).
17. 17)
  - 9. Nakajima, M., Shouichiro, I., Ikeda, T.: ‘Performance of double-step Savonius rotor for environmentally friendly hydraulic turbine’, J. Fluid Sci. Technol., 2008, 3, (3), pp. 410–419 (doi: 10.1299/jfst.3.410).
18. 18)
  - 14. Khan, N.I., Iqbal, M.T., Hinchey, M., et al: ‘Performance of Savonius rotor as a water current turbine’, J. Ocean Technol. Maritime Port Sec., 2009, 4, (2), pp. 72–83.
19. 19)
  - 16. Chen, J., Yang, H.X., Liu, C.P., et al: ‘A novel vertical axis water turbine for power generation from water pipelines’, Energy, 2013, 54, pp. 184–193 (doi: 10.1016/j.energy.2013.01.064).
20. 20)
  - 21. Dean, R.G., Dalrymple, R.A.: ‘Water wave mechanics for engineers and scientists’ (Prentice-Hall, New Jersey, 1984).
21. 21)
  - 13. Falcao, A.F.de O.: ‘Wave energy utilization: a review of the technologies’, Renew. Sustain. Energy Rev., 2010, 14, (3), pp. 899–918 (doi: 10.1016/j.rser.2009.11.003).
22. 22)
  - 17. Ahmed, M.R., Faizal, M., Lee, Y.-H.: ‘Optimization of blade curvature and inter-rotor spacing of Savonius rotors for maximum wave energy extraction’, Ocean Eng., 2013, 65, pp. 32–38 (doi: 10.1016/j.oceaneng.2013.02.005).
23. 23)
  - 22. Orer, G., Ozdamar, A.: ‘An experimental study on the efficiency of the submergence plate wave energy converter’, Renew. Energy, 2007, 32, pp. 1317–1327 (doi: 10.1016/j.renene.2006.06.008).
24. 24)
  - 11. Faizal, M., Ahmed, M.R., Lee, Y.-H.: ‘On utilizing the orbital motion in water waves to drive a Savonius rotor’, Renew. Energy, 2010, 35, pp. 164–169 (doi: 10.1016/j.renene.2009.03.015).
25. 25)
  - 19. Cellini, F., Cha, Y., Porfiri, M.: ‘Harvesting energy from a water flow through ionic polymer metal composites’ buckling’. Electroactive Polymer Actuators and Devices (EAPAD), Book Series: Proc. of SPIE, 2014, Volume: 9056 Article Number: 90560.

Experimental study on performance assessment of Savonius rotor type wave energy converter in an experimental wave flume

References

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