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Journal of Mechanical Science and Technology

, Volume 32, Issue 12, pp 5729–5736 | Cite as

Performance improvement of an oscillating water column wave energy converter by geometry modification

  • Deepak Divashkar Prasad
  • Mohammed Rafiuddin Ahmed
  • Young-Ho LeeEmail author
Article
  • 19 Downloads

Abstract

The performance of an oscillating water column (OWC) device, obtained from computations, was validated with experimental results. The current numerical code showed good agreement with experimental data and also with mathematical models. The base model which recorded rotor power of 0.17 W and efficiency of 8.28 % was then modified–the OWC chamber geometry and the rotor geometry were modified. The best model recorded rotor power and efficiency of 0.34 W and 16.1 %, respectively. Comparing this with the base model, the improvement in rotor efficiency was approximately 94 %. The flow conditions in the current numerical work were fixed and rotor speed was also kept constant. The work highlights that the performance of the rotor at fixed condition can be improved by optimizing the OWC chamber geometry and the rotor design. Furthermore, the current work also highlights that the design of the rotor is strongly influenced by the OWC chamber it is employed in.

Keywords

Wave energy Computational fluid dynamics (CFD) Savonius rotor Oscillating water column (OWC) Particle image velocimetry (PIV) 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Deepak Divashkar Prasad
    • 1
  • Mohammed Rafiuddin Ahmed
    • 1
  • Young-Ho Lee
    • 2
    Email author
  1. 1.Division of Mechanical EngineeringThe University of the South PacificSuvaFiji
  2. 2.Division of Mechanical and Energy System Engineering, College of EngineeringKorea Maritime and Ocean UniversityBusanKorea

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