Experimental Studies of Interaction Forces Affect the Position of Vertical Plates on Oscillating Heave Plates with Cylindrical Bodies in Regular Waves

Eko Sasmito Hadi,Karnoto Karnoto,Muhammad Iqbal,Ari Wibawa,Ojo Kurdi

doi:10.14710/ijred.9.1.77-84

Eko Sasmito Hadi, Karnoto Karnoto + Show 3 more

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https://doi.org/10.14710/ijred.9.1.77-84

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Abstract

This paper discusses an experimental study of a wave energy converter (WEC) without using reaction from the seabed. The WEC uses buoys and heave plates, which can react to their self-reacting. The interaction force between heave plates and buoys can absorb energy from ocean waves better. The heave plate model affects the output of energy produced. It is presented in this study with variations in the position of upright plates. The research aims to measure the influence of the place of the addition of vertical plates into heave plates on the WEC on the hydrodynamic performance (coefficient of mass increase, drag coefficient, and KC value) and the interaction of the force it produces with the buoy on regular waves. The conclusion is the vertical plate position makes the coefficient of mass added Ca increase with an increasing amount of KC, and an almost linear relationship was observed between them. As the frequency increases, the value of C increases slightly, but it is not clear. Thus, the oscillating frequency has little effect on the mass coefficient of added heave plates with vertical plates. Thus, the change in the vertical plate position has only a powerful effect on KC < 0.75. ©2020. CBIORE-IJRED. All rights reserved

Highlights

Wave energy converters (WECs) that use non-seabed reaction sources, such as heaving plates, which are referred to in the wave energy literature as self-reacting wave energy converter (WEC) and because the buoy dimensions are relatively small compared with incident wavelengths, can be referred as the point of reaction at the absorber itself
Heave plates are generally widely used in offshore structures because they can provide additional damping and mass increase to enhance the hydrodynamic response of the system (Zhu & Lim, 2017)
The results indicate that the WEC design with a damper plate produces 41% higher mean annual energy production than the WEC design with a streamlined reacting body at a representative location near the west coast of Vancouver Island, British Columbia, Canada

Summary

Introduction

Wave energy converters (WECs) that use non-seabed reaction sources, such as heaving plates, which are referred to in the wave energy literature as self-reacting WECs and because the buoy dimensions are relatively small compared with incident wavelengths, can be referred as the point of reaction at the absorber itself. Heave plates are generally widely used in offshore structures because they can provide additional damping and mass increase to enhance the hydrodynamic response of the system (Zhu & Lim, 2017). The application of the use of an additional damper plate in the design of a WEC can increase the average annual energy production by 41% in the case of the point absorber WEC that self-reacts to heave movements in irregular waves (Beatty, Bocking, Bubbar, Buckham, & Wild, 2019)

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