Session: 09-02-01 Wave Energy: Hydrodynamics 1

Paper Number: 127129

127129 - Design and Motion Analysis of a Floating Water Channel Platform With Wave Energy Converters 

The aim of this present study is to design the shape of a Y-shaped floating water channel platform (FWCP) with three wave energy converters (WECs). Such Y-shaped structure enhances wave energy revel can extract through reflection, incident wave energy collection, and fluid resonance in a closed region. The challenge is to accurately predicting the platform's motion due to fluid resonance and to ensure stability. In this paper, four models were proposed to design a stable platform, and stability was examined using the GZ curve for each model. Also, the motion performance of the floating platform was evaluated through numerical analysis and model experiments. To obtain an accurate numerical solution, two commercial codes (WAMIT, OrcaWave) were used, and wave exciting force, hydrodynamic coefficients (added mass, radiation damping), and RAO (Response Amplitude Operator) were calculated. Fluid resonance within the floating platform dramatically increased the wave height but complicated each coefficient curve. Meanwhile, the model experiment was conducted in a two-dimensional wave tank (20m x 0.8m x 1m), and several incident wave conditions were selected. The scale ratio of the experimental model is 1/50, and it was made of acrylic material. Surge, heave, and pitch motions were measured and compared to verify the numerical solution. The experimental results and numerical solutions were relatively well matched, but it was found that the platform motion was overestimated at the fluid resonance frequency. To compensate for this, appropriate damping is added, or time domain analysis is required.

Presenting Author: Jeongrok Kim Jeju National University

Presenting Author Biography: 2013. 2 : a master's degree (Jeju National University)
2018. 8 : a doctor's degree (Jeju National University)
2019. 3~ Current : Postdoctoral Researcher (Jeju National University)

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