Session: 09-01-08: Offshore Wind Energy - Hydrodynamics 2

Paper Number: 104576

104576 - Design and Coupled Analysis of Floating Offshore Wind Turbines With Moses and Aerodyn 

The global energy transition will require more wind turbines to be installed offshore, in particular floating wind turbines will be needed over the horizon in deeper water where a more reliable supply of wind is found. At the end of 2022 there will be 132MW of floating offshore wind capacity installed globally, but this is forecast to grow to 14GW by 2030 and 289GW by 2050 [1]. During the design phase these floating systems will require advanced numerical analysis tools to ensure structural integrity, longevity and reliability.

A new coupled analysis tool has been developed to predict the dynamic response of floating wind turbines. This study implements MOSES, an advanced hydrodynamic solver for the simulation of fixed and floating offshore systems, and AeroDyn, OpenFAST’s aerodynamic software library. The proposed method first requires the calculation of the hydrodynamic database of the floating system. MOSES uses this database to compute the floating system’s motions at each time step before passing this data to AeroDyn. Here the aerodynamic loads based on the wind turbine position are calculated and then returned to MOSES where the position of the floater is updated and the time step advanced. Aerodynamic loading and hydrodynamic pressures are then mapped onto a structural plate model which is solved for multiple load cases and post-processed for code compliance.

The motions and accelerations obtained with a MOSES model of the Hywind Spar floating wind system were validated against those produced in model tests and various other numerical models (OC3 Phase IV) [2]. It was found that the coupled MOSES-AeroDyn results were in good agreement with published experimental and numerical data.

 

[1] DNV. (2022) Energy Transition Outlook 2022 [Online] [Accessed on 20 October 2022] https://www.dnv.com/energy-transition-outlook/download.html

[2] A. Jonkman, W. Musial, (2010) Offshore Code Comparison Collaboration (OC3) for IEA Task 23 Offshore Wind Technology and Deployment, Technical Report, National Renewable Energy Laboratory.

Presenting Author: Daniel Veen Bentley Systems

Presenting Author Biography: Daniel Veen, PhD, is responsible for defining and executing the product development and market strategy for MOSES at Bentley Systems. Dan joined Bentley in 2013 as a senior developer on the MOSES team, focused on enhancing the core hydrodynamics solver. Since 2019 he has also been responsible for the development of OpenWindPower Floating Platform, an integrated solution leveraging the capabilities of MOSES and SACS for the design and analysis of floating wind turbines.

Authors:

Daniel Veen Bentley Systems
Spiro J. Pahos Bentley Systems
Shawn Meng Bentley Systems
Simon Dillenburg THEC Offshore