Coupled loads analysis of a novel shared-mooring floating wind farm

Lozon, Ericka; Hall, Matthew

doi:10.1016/j.apenergy.2022.120513

Coupled loads analysis of a novel shared-mooring floating wind farm

Journal Article · Tue Dec 13 23:00:00 EST 2022 · Applied Energy

DOI:https://doi.org/10.1016/j.apenergy.2022.120513· OSTI ID:1961145

Lozon, Ericka ^[1]; Hall, Matthew ^[1]

National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Shared mooring lines are a method to reduce the stationkeeping cost of floating offshore wind farms; however, their impacts on floating array dynamics are not yet well understood. Here this article presents advancements to floating wind farm simulation capabilities that allow the dynamic modeling of shared-mooring floating wind arrays - specifically, platform coupling through shared lines and proper phasing of wave loads across the array. These capabilities are demonstrated on a 10-turbine shared-mooring array featuring two staggered rows of wind turbines. A baseline array design with individually moored turbines is used as a basis for comparison. Coupled analysis using FAST.Farm shows that the shared-mooring design has smaller fluctuations in surge when compared to the baseline design. The mean and maximum platform offsets are highest in normal operating conditions, but the maximum mooring line tensions are highest in 50-year storm conditions. Power spectral density analysis of platform surge and sway motions shows that the shared mooring configuration does not introduce any significant inter-platform resonances. The tower-base bending moment statistics and the line tension damage equivalent loads indicate no consequential differences in turbine loading or mooring fatigue life. Anchor load analysis shows that the total required anchor capacity for the shared-mooring array is decreased by approximately 25% when shared anchors are used. Dynamic simulations of the shared mooring system under line failures show that remaining line tensions stay within bounds and that offsets are significantly smaller when compared to the baseline design. Overall, the results show that shared moorings do not introduce any dynamic response concerns in this floating wind array design.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1961145

Report Number(s):: NREL/JA-5000-82314; MainId:83087; UUID:ed5dd064-a137-467a-ba16-4e4dbba0cf20; MainAdminID:64086

Journal Information:: Applied Energy, Journal Name: Applied Energy Vol. 332; ISSN 0306-2619

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (23)

Wake meandering effects on floating wind turbines Wise, Adam S.; Bachynski, Erin E. Wind Energy, Vol. 23, Issue 5 https://doi.org/10.1002/we.2485	journal	February 2020
A review of modelling techniques for floating offshore wind turbines Otter, Aldert; Murphy, Jimmy; Pakrashi, Vikram Wind Energy, Vol. 25, Issue 5 https://doi.org/10.1002/we.2701	journal	December 2021
Numerical and experimental investigation into the dynamic response of a floating wind turbine spar array platform Ding, Qinwei; Li, Chun; Yu, Nanting Journal of Mechanical Science and Technology, Vol. 32, Issue 3 https://doi.org/10.1007/s12206-018-0213-x	journal	March 2018
Dynamic Response of Offshore Wind Turbine on 3×3 Barge Array Floating Platform under Extreme Sea Conditions Liu, Qing-song; Miao, Wei-pao; Yue, Min-nan China Ocean Engineering, Vol. 35, Issue 2 https://doi.org/10.1007/s13344-021-0017-0	journal	April 2021
Fatigue loads for wind turbines operating in wakes Thomsen, Kenneth; Sørensen, Poul Journal of Wind Engineering and Industrial Aerodynamics, Vol. 80, Issue 1-2 https://doi.org/10.1016/S0167-6105(98)00194-9	journal	March 1999
Coupled Mooring Systems for Floating Wind Farms Goldschmidt, Marek; Muskulus, Michael Energy Procedia, Vol. 80 https://doi.org/10.1016/j.egypro.2015.11.429	journal	January 2015
A semi-analytical frequency domain model for efficient design evaluation of spar floating wind turbines Hegseth, John Marius; Bachynski, Erin E. Marine Structures, Vol. 64 https://doi.org/10.1016/j.marstruc.2018.10.015	journal	March 2019
Development and validation of a tightly coupled CFD/6-DOF solver for simulating floating offshore wind turbine platforms Dunbar, Alexander J.; Craven, Brent A.; Paterson, Eric G. Ocean Engineering, Vol. 110 https://doi.org/10.1016/j.oceaneng.2015.08.066	journal	December 2015
A numerical study on the hydrodynamic impact of device slenderness and array size in wave energy farms in realistic wave climates Penalba, Markel; Touzón, Imanol; Lopez-Mendia, Joseba Ocean Engineering, Vol. 142 https://doi.org/10.1016/j.oceaneng.2017.06.047	journal	September 2017
System reliability of floating offshore wind farms with multiline anchors Hallowell, Spencer T.; Arwade, Sanjay R.; Fontana, Casey M. Ocean Engineering, Vol. 160 https://doi.org/10.1016/j.oceaneng.2018.04.046	journal	July 2018
Comparison of pilot-scale floating offshore wind farms with shared moorings Connolly, Patrick; Hall, Matthew Ocean Engineering, Vol. 171 https://doi.org/10.1016/j.oceaneng.2018.08.040	journal	January 2019
Spatial coherence of ocean waves in multiline anchor systems for floating offshore wind turbines Fontana, Casey M.; Hallowell, Spencer T.; Arwade, Sanjay R. Ocean Engineering, Vol. 184 https://doi.org/10.1016/j.oceaneng.2019.04.048	journal	July 2019
Linearized modeling and optimization of shared mooring systems Wilson, Samuel; Hall, Matthew; Housner, Stein Ocean Engineering, Vol. 241 https://doi.org/10.1016/j.oceaneng.2021.110009	journal	December 2021
OC6 Phase Ib: Validation of the CFD predictions of difference-frequency wave excitation on a FOWT semisubmersible Wang, Lu; Robertson, Amy; Jonkman, Jason Ocean Engineering, Vol. 241 https://doi.org/10.1016/j.oceaneng.2021.110026	journal	December 2021
An Open-Source Frequency-Domain Model for Floating Wind Turbine Design Optimization Hall, Matthew; Housner, Stein; Zalkind, Daniel Journal of Physics: Conference Series, Vol. 2265, Issue 4 https://doi.org/10.1088/1742-6596/2265/4/042020	journal	May 2022
Dynamics of two floating wind turbines with shared anchor and mooring lines Gözcü, Ozan; Kontos, Stavros; Bredmose, Henrik Journal of Physics: Conference Series, Vol. 2265, Issue 4 https://doi.org/10.1088/1742-6596/2265/4/042026	journal	May 2022
Design and analysis of a ten-turbine floating wind farm with shared mooring lines Hall, Matthew; Lozon, Ericka; Housner, Stein Journal of Physics: Conference Series, Vol. 2362, Issue 1 https://doi.org/10.1088/1742-6596/2362/1/012016	journal	November 2022
Global analysis of floating offshore wind turbines with shared mooring system Munir, H.; Lee, C. F.; Ong, M. C. IOP Conference Series: Materials Science and Engineering, Vol. 1201, Issue 1 https://doi.org/10.1088/1757-899X/1201/1/012024	journal	November 2021
Optimizing the Cost and Reliability of Shared Anchors in an Array of Floating Offshore Wind Turbines Devin, Michael C.; DuPont, Bryony L.; Hallowell, Spencer T. ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg, Vol. 7, Issue 4 https://doi.org/10.1115/1.4051163	journal	August 2021
Efficient Multiline Anchor Systems for Floating Offshore Wind Turbines Fontana, Casey M.; Arwade, Sanjay R.; DeGroot, Don J. ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, Volume 6: Ocean Space Utilization; Ocean Renewable Energy https://doi.org/10.1115/OMAE2016-54476	conference	October 2016
Modeling of a Shared Mooring System for a Dual-Spar Configuration Liang, Guodong; Merz, Karl; Jiang, Zhiyu ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering, Volume 9: Ocean Renewable Energy https://doi.org/10.1115/OMAE2020-18467	conference	December 2020
The Force Exerted by Surface Waves on Piles Morison, J. R.; Johnson, J. W.; Schaaf, S. A. Journal of Petroleum Technology, Vol. 2, Issue 05 https://doi.org/10.2118/950149-G	journal	May 1950
An efficient frequency-domain model for quick load analysis of floating offshore wind turbines Pegalajar-Jurado, Antonio; Borg, Michael; Bredmose, Henrik Wind Energy Science, Vol. 3, Issue 2 https://doi.org/10.5194/wes-3-693-2018	journal	January 2018

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