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Effects of bottom profile of an oscillating water column device on its hydrodynamic characteristics

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  • John Ashlin, S.
  • Sundar, V.
  • Sannasiraj, S.A.

Abstract

The oscillating water column, OWC device is one of the more promising devices for the extraction of energy from ocean waves. The present study mainly focuses on the influence of bottom profile configuration in the OWC on its hydrodynamic performance. Four different bottom profiles flat, circular curve of radius 300 mm, slope of 1:1 and 1:5 were tested in a wave flume. The said models were simultaneously subjected to both regular and random waves. The hydrodynamic performance was studied in terms of wave amplification factor, wave power absorption coefficient, hydrodynamic efficiency, lip wall pressure ratio (pressure at in front of lip wall/pressure due to incident wave) and air pressure ratio (air pressure/pressure due to incident wave). It is found that the natural period of the system was around 1.9 s. The OWC with circular curve bottom profile exhibited a better performance in terms of its effective wave energy conversion and wave amplification factor inside the chamber. The peak magnitude of hydrodynamic efficiency for circular curve bottom profile was 0.71. The performance of the OWC model is found to be better when closer to the natural period of the device.

Suggested Citation

  • John Ashlin, S. & Sundar, V. & Sannasiraj, S.A., 2016. "Effects of bottom profile of an oscillating water column device on its hydrodynamic characteristics," Renewable Energy, Elsevier, vol. 96(PA), pages 341-353.
    • Handle: RePEc:eee:renene:v:96:y:2016:i:pa:p:341-353
    DOI: 10.1016/j.renene.2016.04.091
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    References listed on IDEAS

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    1. Zhang, Yali & Zou, Qing-Ping & Greaves, Deborah, 2012. "Air–water two-phase flow modelling of hydrodynamic performance of an oscillating water column device," Renewable Energy, Elsevier, vol. 41(C), pages 159-170.
    2. Folley, M. & Whittaker, T.J.T., 2009. "Analysis of the nearshore wave energy resource," Renewable Energy, Elsevier, vol. 34(7), pages 1709-1715.
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    Cited by:

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    2. Ayrton Alfonso Medina Rodríguez & Gregorio Posada Vanegas & Rodolfo Silva Casarín & Edgar Gerardo Mendoza Baldwin & Beatriz Edith Vega Serratos & Felipe Ernesto Puc Cutz & Enrique Alejandro Mangas Che, 2022. "Experimental Investigation of the Hydrodynamic Performance of Land-Fixed Nearshore and Onshore Oscillating Water Column Systems with a Thick Front Wall," Energies, MDPI, vol. 15(7), pages 1-26, March.
    3. Rezanejad, K. & Guedes Soares, C. & López, I. & Carballo, R., 2017. "Experimental and numerical investigation of the hydrodynamic performance of an oscillating water column wave energy converter," Renewable Energy, Elsevier, vol. 106(C), pages 1-16.
    4. Kharati-Koopaee, Masoud & Fathi-Kelestani, Arman, 2020. "Assessment of oscillating water column performance: Influence of wave steepness at various chamber lengths and bottom slopes," Renewable Energy, Elsevier, vol. 147(P1), pages 1595-1608.
    5. Tunde Aderinto & Hua Li, 2019. "Review on Power Performance and Efficiency of Wave Energy Converters," Energies, MDPI, vol. 12(22), pages 1-24, November.
    6. Daniel Raj, D. & Sundar, V. & Sannasiraj, S.A., 2019. "Enhancement of hydrodynamic performance of an Oscillating Water Column with harbour walls," Renewable Energy, Elsevier, vol. 132(C), pages 142-156.
    7. Wang, Chen & Zhang, Yongliang, 2021. "Hydrodynamic performance of an offshore Oscillating Water Column device mounted over an immersed horizontal plate: A numerical study," Energy, Elsevier, vol. 222(C).
    8. Carlo, Lilia & Iuppa, Claudio & Faraci, Carla, 2023. "A numerical-experimental study on the hydrodynamic performance of a U-OWC wave energy converter," Renewable Energy, Elsevier, vol. 203(C), pages 89-101.
    9. Mohapatra, Piyush & Vijay, K.G. & Bhattacharyya, Anirban & Sahoo, Trilochan, 2023. "Influence of distinct bottom geometries on the hydrodynamic performance of an OWC device," Energy, Elsevier, vol. 277(C).
    10. Elhanafi, Ahmed & Fleming, Alan & Macfarlane, Gregor & Leong, Zhi, 2016. "Numerical energy balance analysis for an onshore oscillating water column–wave energy converter," Energy, Elsevier, vol. 116(P1), pages 539-557.
    11. Wang, Chen & Zhang, Yongliang, 2021. "Numerical investigation on the wave power extraction for a 3D dual-chamber oscillating water column system composed of two closely connected circular sub-units," Applied Energy, Elsevier, vol. 295(C).
    12. Deng, Zhengzhi & Wang, Lin & Zhao, Xizeng & Wang, Peng, 2020. "Wave power extraction by a nearshore oscillating water column converter with a surging lip-wall," Renewable Energy, Elsevier, vol. 146(C), pages 662-674.
    13. Liu, Zhen & Xu, Chuanli & Qu, Na & Cui, Ying & Kim, Kilwon, 2020. "Overall performance evaluation of a model-scale OWC wave energy converter," Renewable Energy, Elsevier, vol. 149(C), pages 1325-1338.
    14. Stefania Naty & Antonino Viviano & Enrico Foti, 2016. "Wave Energy Exploitation System Integrated in the Coastal Structure of a Mediterranean Port," Sustainability, MDPI, vol. 8(12), pages 1-19, December.
    15. Louise O’Boyle & Björn Elsäßer & Trevor Whittaker, 2017. "Experimental Measurement of Wave Field Variations around Wave Energy Converter Arrays," Sustainability, MDPI, vol. 9(1), pages 1-16, January.
    16. Medina Rodríguez, Ayrton Alfonso & Silva Casarín, Rodolfo & Blanco Ilzarbe, Jesús María, 2022. "The influence of oblique waves on the hydrodynamic efficiency of an onshore OWC wave energy converter," Renewable Energy, Elsevier, vol. 183(C), pages 687-707.
    17. Çelik, Anıl & Altunkaynak, Abdüsselam, 2021. "An in depth experimental investigation into effects of incident wave characteristics front wall opening and PTO damping on the water column displacement and air differential pressure in an OWC chamber," Energy, Elsevier, vol. 230(C).
    18. Hayati, Mohammad & Nikseresht, Amir H. & Haghighi, Ali Taherian, 2020. "Sequential optimization of the geometrical parameters of an OWC device based on the specific wave characteristics," Renewable Energy, Elsevier, vol. 161(C), pages 386-394.
    19. Masoomi, Mobin & Sarlak, Hamid & Rezanejad, Kourosh, 2023. "Hydrodynamic performance analysis of a new hybrid wave energy converter system using OpenFOAM," Energy, Elsevier, vol. 269(C).
    20. Viviano, Antonino & Naty, Stefania & Foti, Enrico & Bruce, Tom & Allsop, William & Vicinanza, Diego, 2016. "Large-scale experiments on the behaviour of a generalised Oscillating Water Column under random waves," Renewable Energy, Elsevier, vol. 99(C), pages 875-887.
    21. Güths, A.K. & Teixeira, P.R.F. & Didier, E., 2022. "A novel geometry of an onshore Oscillating Water Column wave energy converter," Renewable Energy, Elsevier, vol. 201(P1), pages 938-949.
    22. Guo, Bingyong & Ringwood, John V., 2021. "Geometric optimisation of wave energy conversion devices: A survey," Applied Energy, Elsevier, vol. 297(C).
    23. Mayon, Robert & Ning, Dezhi & Zhang, Chongwei & Chen, Lifen & Wang, Rongquan, 2021. "Wave energy capture by an omnidirectional point sink oscillating water column system," Applied Energy, Elsevier, vol. 304(C).
    24. Taherian Haghighi, Ali & Nikseresht, Amir H. & Hayati, Mohammad, 2021. "Numerical analysis of hydrodynamic performance of a dual-chamber Oscillating Water Column," Energy, Elsevier, vol. 221(C).

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