Session: 09-02-05 Wave Energy: Design and Innovation 2

Paper Number: 127418

127418 - A Numerical Analysis of a Hybrid Semisubmersible and Point Absorber Wind Wave System 

Harnessing energy from wind and wave resources at offshore locations has gained growing interest in recent years. According to the Global Offshore Wind Report 2022, installed offshore wind capacity has reached 57.6GW at the end of 2022. While most current offshore wind turbines are affixed to the seabed in shallow waters, the next generation of deployments is anticipated in deeper water for better resources, necessitating the use of floating offshore wind turbine (FOWT) designs. Wave energy converters (WECs), on the other hand, are designed to extract energy from ocean waves and convert the absorbed mechanical power into useful electricity, and integrating a WEC system with the FOWT platform may provide a cost-effective solution to enhance energy production, reduce the platform motion and to share the cost of mooring and cables. However, combining two relatively nascent technologies together requires further investigation of the dynamic response of the system across a wide range of wind and wave conditions.

 

Numerical analysis plays an important role in the analysis of offshore renewable systems, and the radiation and diffraction approach-based time-domain methods are the most widely used numerical tools, particularly during the design process. WEC-Sim (Wave Energy Converter SIMulator) is a MATLAB-based numerical model for simulating WECs, and we will use WEC-Sim and MOST (Matlab for offshore wind turbine simulation tool) for the analysis of a hybrid wind wave system. MOST was also developed using MATLAB Simscape Multibody toolbox. It consists of aerodynamic models developed based on the blade element momentum method and interfaces with WEC-Sim for the hydrodynamic simulations. We will also use MoorDyn for capturing the mooring dynamics. In this study, numerical simulations will be carried out for the analysis of the DeepCwind FOWT platform with a set of linear point absorber WECs. The primary objective is to assess the efficacy of coupling MOST and WEC-Sim for the hybrid floating wind-wave system across various design scenarios. Finally, the results of the system hydrodynamic response will be analyzed and the effectiveness of using the WEC system for stabilizing the platform will be discussed.

Presenting Author: Yi-Chieh Huang National Yang Ming Chiao Tung University

Presenting Author Biography: Mr. Yi-Chieh Huang is a student at the National Yang-Ming Chiao Tung University

Authors:

Yi-Chieh Huang National Yang Ming Chiao Tung University
Yi-Hsiang Yu National Yang Ming Chiao Tung University