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Assessing the impacts of wakes on floating wind farms with shared anchors

Journal Article · · Journal of Physics. Conference Series
 [1];  [2];  [3];  [1]
  1. Univ. of Massachusetts, Amherst, MA (United States)
  2. Univ. of Stuttgart (Germany)
  3. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
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This paper examines wake effects for floating wind farms with shared anchors. Three 20-turbine farms are examined: a grid-formation baseline with no shared anchors, a farm based on 3-line anchors, and a farm based on 6-line anchors, governed by a wind turbine spacing of 8 rotor diameters. The IEA 15 MW reference turbine on the UMaine semisubmersible platform was used with a taut mooring system in deep- water depths representative of U.S. west coast lease areas. A steady-state wake model showed that, when evaluating a sweep of wind headings, the baseline design had the lowest wake losses, with a value of 11.7 %, followed by the 6-line at 12.9% and the 3-line at 13.8%. Dynamic simulations were run in FAST.Farm to analyse the effects of wakes on mean anchor loads for wind headings that showed significant wake losses. The baseline farm showed the largest anchor load reductions due to wake effects (up to 16%), followed by the 3-line farm (up to 8%), and the 6-line farm, which showed relatively consistent load magnitudes on the 6-line anchors across all headings.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
National Offshore Wind Research and Development Consortium; National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
2396309
Report Number(s):
NREL/JA--5000-88739; MainId:89518; UUID:b28abb29-9f1c-4cee-b0c0-a7383f95ce61; MainAdminId:71933
Journal Information:
Journal of Physics. Conference Series, Journal Name: Journal of Physics. Conference Series Journal Issue: 6 Vol. 2767; ISSN 1742-6588
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (9)

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Multiline anchor force dynamics in floating offshore wind turbines journal July 2018
Wake meandering effects on floating wind turbines journal February 2020
Experimental and theoretical study of wind turbine wakes in yawed conditions journal October 2016
Design and costs benefits of shared anchors and shared mooring lines of floating wind turbines at farm level journal October 2023
Turbulent Wind Simulation Duration’s Impact on Mooring Fatigue Damage for Floating Offshore Wind Turbines conference December 2023
Wake Effects on Multiline Anchor Loads for Floating Offshore Wind Turbines conference December 2023
Parametric Study on Deep-Water Taut Mooring for Floating Offshore Turbines conference December 2023
Analytical Modeling of Wind Farms: A New Approach for Power Prediction journal September 2016

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Related Subjects

17 WIND ENERGY
floating offshore wind
moorings
shared anchors
wake effects