Author:
Vargas Guilherme Fuhrmeister,Schettini Edith Beatriz Camaño,Scapin Bruno Alavarez
Abstract
The Oscillating Wave Surge Converter represents a technology with great potential for generating electricity from ocean waves, promoting energy continuously throughout a day. Its development is on a pre-commercial scale and has been encouraging several companies and institutions to invest in the improvement and study of this conversion system. Simulations in Computational Fluid Dynamics are very important tools for the development of these converters, since they provide essential details for the analysis of the variables that influence the system. In this context, the present work uses the Large Eddy Simulation modeling to study the influence of the bottom slope on the device dynamics, which is performed using the OpenFOAM v.4.1 computational code and its extension OlaFlow. The model used in the analysis is two-dimensional and based on the Wall-Adapting Local Eddy-Viscosity methodology, while a structured mesh is applied. Through a detailed analysis, it was observed that the converter hydrodynamics is strongly influenced by the bottom slope, which is responsible for the intensification of the captured power in regions with slopes lower than 5º, and for the power decrease in cases where the slope exceeds 15º. Significant increases in slope can cause a decrease up to 28% in the converter excitation torque, significantly affecting its performance in electric power generation.
Publisher
South Florida Publishing LLC
Reference18 articles.
1. Bourgoin, A.C., Guillou, S.S., Thiébot, J., Ata, R. (2020). "Turbulence characterization at a tidal energy site using large-eddy simulations: case of the Alderney Race". Philosophical Transactions of the Royal Society A, 378(2178), 20190499.
2. Brito, M., Canelas, R. B., García-Feal, O., Domínguez, J. M., Crespo, A. J. C., Ferreira, R. M. L., ... Teixeira, L. (2020). " A numerical tool for modelling oscillating wave surge converter with nonlinear mechanical constraints ". Renewable Energy, 146, 2024-2043.
3. Curto, D.; Franzitta, V.; Guercio, A. (2021). " Sea wave energy. A review of the current technologies and perspectives ". Energies, 14 (20), 6604.
4. Esteban, G.A., Aristondo, A., Izquierdo, U., Blanco, J. M., Pérez-Morán, G. (2022). " Experimental analysis and numerical simulation of wave overtopping on a fixed vertical cylinder under regular waves ". Coastal Engineering, 173, 104097.
5. Fuhrmeister, G. V. (2020). “Validação de um modelo 2D para a simulação numérica em grandes escalas de um conversor de ondas do tipo OWSC”. Anais do III Encontro Sul Brasileiro de Engenharia Ambiental e Sanitária (ESBEA), Caxias do Sul, Brasil.