0
research-article

EXPERIMENTAL ASSESSMENT OF THE PERFORMANCE OF CECO WAVE ENERGY CONVERTER IN IRREGULAR WAVES

[+] Author and Article Information
Claudio Alexis Rodríguez Castillo

Laboratory of Ocean Technology (LabOceano), Department of Naval Architecture and Ocean Engineering, Federal University of Rio de Janeiro, Caixa Postal N 68.508, CEP 21.945-970, Rio de Janeiro, RJ, Brazil
claudiorc@oceanica.ufrj.br

Paulo Rosa-Santos

CIIMAR − Interdisciplinary Centre of Marine and Environmental Research of the University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal, FEUP − Faculty of Engineering of the University of Porto, Department of Civil Engineering, rua Dr. Roberto Frias, s/n, 4200-465, Porto, Portugal
pjrsantos@fe.up.pt

Francisco Taveira-Pinto

CIIMAR − Interdisciplinary Centre of Marine and Environmental Research of the University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal, FEUP − Faculty of Engineering of the University of Porto, Department of Civil Engineering, rua Dr. Roberto Frias, s/n, 4200-465, Porto, Portugal
fpinto@fe.up.pt

1Corresponding author.

ASME doi:10.1115/1.4043177 History: Received July 13, 2018; Revised March 05, 2019

Abstract

The performance assessment of a wave energy converter (WEC) is a key task. Depending on the layout of the WEC system and type of power take-off (PTO) mechanism, the determination of the absorbed power at model scale involves several challenges, particularly when the measurement of PTO forces is not available. In irregular waves, the task is even more difficult due to the random character of forces and motions. Recent studies carried out with kinetic energy harvesters (KEH) have proposed expressions for the estimation of the power based only on the measured motions. Assuming that the WEC behaves as a KEH at model scale, the expressions for power estimation of KEHs have been heuristically adapted to WECs. CECO, a floating-point absorber, has been used as case study. Experimental data from model tests in irregular waves are presented and analyzed. Spectral analyses have been applied to investigate the WEC responses in the frequency domain and to derive expressions to estimate the absorbed power in irregular waves. The experimental transfer functions of the WEC motions demonstrated that the PTO damping is significantly affected by the incident waves. Based on KEH approach's results, absorbed power and PTO damping coefficients have been estimated. A linear numerical potential model to compute transfer functions has been also implemented and calibrated based on the experimental results. The numerical results allowed the estimation of viscous and losses effects and showed that although the KEH approach underestimated the absorbed power, qualitatively reproduced the WEC performance in waves.

Copyright (c) 2019 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In