Preprints
https://doi.org/10.5194/wes-2024-67
https://doi.org/10.5194/wes-2024-67
31 May 2024
 | 31 May 2024
Status: this preprint is currently under review for the journal WES.

Turbine Repositioning Technique for Layout Economics (TRTLE) in Floating OffshoreWind Farms – Humboldt Case Study

Yuksel Rudy Alkarem, Kimberly Huguenard, Richard Kimball, Spencer Hallowell, Amrit Verma, Erin Bachynski-Polić, and Amir Nejad

Abstract. This study investigates the farm-level effects of designing a uniform turbine repositioning (TR)-enabling mooring system on the efficiency and economics of a floating wind farm at the south-west Humboldt wind energy area, characterized by its deep waters. Four layout concepts with possibility for shared anchors are investigated. These concepts vary in terms of number of mooring lines per wind turbine. The 2-line configuration allows the platforms to have large excursions around their undisplaced positions when the system is loaded compared to a typical 3-line and 4-line configurations. The relative displacements of the wind turbines as a function of varying wind speeds and directions and their subsequent impacts on wake losses are studied. When allowing TR, wake effects can be reduced. Annual energy production increases of up to 1.3 % are achieved. Furthermore, through strategic farm-level management of mooring orientations for the 2-line setup, the proposed design achieves 50 % and 31 % reduction in anchor count and total mooring length, respectively, for the tetragonal design, compared to a conventional baseline design. The hexagonal design reaches 20 % and 27 % reductions of these quantities. A preliminary cost analysis shows a 27 % cost reduction compared to the baseline mooring system, giving a financial window for increasing reliability to the mooring system.

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Yuksel Rudy Alkarem, Kimberly Huguenard, Richard Kimball, Spencer Hallowell, Amrit Verma, Erin Bachynski-Polić, and Amir Nejad

Status: open (until 28 Jun 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2024-67', Anonymous Referee #1, 18 Jun 2024 reply
  • RC2: 'Comment on wes-2024-67', Anonymous Referee #2, 19 Jun 2024 reply
  • RC3: 'Comment on wes-2024-67', Anonymous Referee #3, 20 Jun 2024 reply
Yuksel Rudy Alkarem, Kimberly Huguenard, Richard Kimball, Spencer Hallowell, Amrit Verma, Erin Bachynski-Polić, and Amir Nejad
Yuksel Rudy Alkarem, Kimberly Huguenard, Richard Kimball, Spencer Hallowell, Amrit Verma, Erin Bachynski-Polić, and Amir Nejad

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Short summary
This research is a "less-is-more" demonstration of a novel concept that boost the efficiency of floating wind farms while maintaining fewer number of mooring line/anchors, reducing cost and the large footprint wind farms can have over the ocean bed and the water column. The novelty of this work lies in the passive wake steering method to enhance annual energy production and in integrating that with configurations that allow shared/multiline anchoring potential.
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