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Wave power extraction by a dual OWC chambers over an undulated bottom

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  • Naik, Nikita
  • Gayathri, R.
  • Behera, H.
  • Tsai, Chia-Cheng

Abstract

The impacts of sloping bottom and slanted impenetrable wall on dual oscillating water columns (OWCs) with a slanted front wall are examined. To tackle the physical model, a coupled eigenfunction expansion — boundary element system is employed. The concept is based on employing the anticipated amplification of scattered and reflected wave fields generated by the existence of sloping walls to enhance the absorption of wave power driven by the walls’ wave reflections. The study concludes that 100% efficiency occurs for smaller incident wave angles. It is also observed that compared with short waves, the efficiency of the device is more in the long-wave region. OWCs are observed to be more effective over the undulating bottom and sloping impermeable wall with an increased spacing between the water columns and the second OWC to the impermeable wall. Additionally, the chambers’ width and the sloping bottom angle are vital parameters for higher power extraction from the OWCs. Furthermore, the optimal values of slope bottom and wall inclination may be employed to build and implement an efficient OWC device. Moreover, the proposed model can also be used as a breakwater to protect the coastline.

Suggested Citation

  • Naik, Nikita & Gayathri, R. & Behera, H. & Tsai, Chia-Cheng, 2023. "Wave power extraction by a dual OWC chambers over an undulated bottom," Renewable Energy, Elsevier, vol. 216(C).
    • Handle: RePEc:eee:renene:v:216:y:2023:i:c:s0960148123009400
    DOI: 10.1016/j.renene.2023.119026
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    References listed on IDEAS

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