期刊
APPLIED ENERGY
卷 311, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2022.118629
关键词
Uppsala WEC; Embedded focused waves; NewWave; Extreme events; DualSPHysics; MoorDyn plus; Project Chrono; CFD
资金
- Universidade de Vigo/CISUG, Spain
- MCIN/AEI [SURVIWEC PID2020113245RB-I00]
- Xunta de Galicia, Conselleria de Cultura, Educacion e Universidade, Spaon [ED431C 2021/44]
- COST (European Cooperation in Science and Technology) - Horizon 2020 Framework Programme of the European Union [CA17105]
- Italian Ministry for Education, University and Research (MIUR) - European Union [DOT 1328490-3]
- Xunta de Galicia, Spain [ED481A-2021/337]
- Centre of Natural Hazards and Disaster Science, Sweden
- STandUP for Energy
- Swedish Energy Authority [47264-1]
This study introduces a reliable numerical tool for studying the dynamics and survivability of wave energy converters in harsh offshore conditions. By comparing numerical results with physical test data, the accuracy of the numerical model is validated. Additionally, the study provides a survivability analysis and optimization guidelines for marine structures, aiming to increase their lifespan and reduce costs.
Probably the biggest challenge for wave energy is to ensure survival in harsh offshore conditions, in order to reduce costs for offshore repair operations and downtime, and achieve economic viability. This work presents a reliable numerical tool that can be used to study the dynamics and survivability of wave energy converters in violent wave conditions, possibly cutting down the costs of experimental campaigns. Within the Smoothed Particle Hydrodynamics framework, this research identifies a detailed procedure to model a taut-moored point absorber wave energy converter together with its inherent power take-off device, which seamlessly exploits its functions of energy harvesting and load bearing. A validation of the DualSPHysics code is provided by contrasting the numerical outcome with a thorough set of data obtained in physical tests with extreme waves, showing that the time-integrated numerical model can capture with good accuracy all the physics involved. The computational fluid dynamics tool is employed to perform a survivability study, modeling high-return period wave conditions for marine structures, and providing guidelines on how to create the numerically best setup to be used for design purposes. A real-like irregular sea state representation, comprising 500 waves, was used to draw insightful indications for the structure optimization to increase the structure's life expectancy, or conversely, to reduce the initial and operational costs.
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