Numerical Analysis of Velocity Magnitude on Wave Energy Converter System in Perforated Breakwater

Oki Setyandito (Department of Civil Engineering, Faculty of Engineering, University of Bina Nusantara, Jakarta)
Nizam Nizam (Department of Civil and Environmental Engineering, Gadjah Mada University, Yogyakarta)
Andrew John Pierre (Department of Civil Engineering, Faculty of Engineering, University of Bina Nusantara, Jakarta)
Gede Dharma Suputra (Department of Civil and Environmental Engineering, Gadjah Mada University, Yogyakarta)
Yureana Wijayanti (Department of Civil Engineering, Faculty of Engineering, University of Bina Nusantara, Jakarta)
Martin Anda (Environmental Engineering Program, Murdoch University, Western Australia)

International Journal of Renewable Energy Development
Vol 11, No 1 (2022): February 2022

Waves are an alternative energy source that can be used for electricity generation. Wave Energy Converter (WEC) system in perforated breakwater is potentially applicable WEC system for coastal area. The magnitude of wave energy generated is determined by the volume of sea water inside the perforated breakwater. This volumetric flow rate is calculated using the flow velocity at perforated holes on the structure slope. Therefore, this research aims to study the velocity magnitude by analyzing the interrelation among wave steepness, wave run-up and relative velocity. The method used consists of applying numeric 3D flow model in the perforated structure of the breakwater with the variation of wave height, wave period and structure slope. The result shows that, the steeper the structure, the bigger is the relative run up (Ru/H). The higher the relative run up, the higher are the relative run-up velocities (V/Vru). As the velocity increase, the volumetric flow rate inside perforated breakwater will be higher, which leads to higher wave energy. Hence, it can be concluded that the higher the velocities (V/Vru), the higher is the wave energy generated.