Trends in floating offshore wind platforms: A review of early-stage devices

Edwards, Emma C.; Holcombe, Anna; Brown, Scott; Ransley, Edward; Hann, Martyn; Greaves, Deborah

doi:10.1016/j.rser.2023.114271

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…In recent years, offshore floating wind energy technology has garnered increasing interest due to the richer and more stable wind resources available in deep-sea areas compared to coastal regions [1]. However, harnessing wind energy in deep-sea locations poses greater challenges compared to exploiting nearshore wind energy resources.…”

Section: Introductionmentioning

confidence: 99%

Exploring Motion Stability of a Novel Semi-Submersible Platform for Offshore Wind Turbines

Zhao,

Wu,

Zhou

2024

Energies

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The stability of offshore floating wind turbine foundation platforms is a fundamental requirement for the efficiency and safety of wind power generation systems. This paper proposes a novel small-diameter float-type semi-submersible platform to improve system stability. To evaluate the superior motion stability of the proposed floating platform, a comprehensive frequency–domain response analysis and experimental study were conducted in comparison with the OC4-DeepCwind platform developed by the National Renewable Energy Laboratory (NREL). The respective comparison of the frequency–domain response analysis and the experimental results demonstrated that the proposed floating wind turbine platform shows better hydrodynamic characteristics and resonance avoidance capability. This not only reduces the Response Amplitude Operators (RAOs), but also enhances the system stability, namely, effectively avoiding the regions of concentrated wave loading and low-frequency ranges. Furthermore, the proposed small-diameter semi-submersible platform has the potential to reduce manufacturing costs, providing valuable insights for the manufacturing of offshore floating wind turbine systems.

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Section: Introductionmentioning

confidence: 99%

Exploring Motion Stability of a Novel Semi-Submersible Platform for Offshore Wind Turbines

Zhao,

Wu,

Zhou

2024

Energies

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“…With the progression of marine resource development, offshore platforms were built in "shallow water areas" for "deep water areas" [26]. The steel piles of offshore platforms are more likely to suffer longitudinal non-uniform corrosion in thermoclines.…”

Section: Introductionmentioning

confidence: 99%

Galvanic Corrosion of E690 Offshore Platform Steel in a Simulated Marine Thermocline

Hu,

Lin,

Deng

et al. 2024

Metals

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Marked changes in temperature, pH, dissolved oxygen (DO) content, and nutrient content typically occur in marine thermoclines, which are key factors that affect the corrosion of metals. Offshore platforms require marine metals to be exposed to deep-sea environments and thus increase their penetration into the marine thermocline. This study investigates the galvanic corrosion of E690 steel in a marine thermocline using a simulated marine thermocline (SMT). Specifically, the corrosion of E690 steel was analyzed using the wire beam electrode (WBE) technique, linear polarization (LP), corrosion morphology, and weight loss measurement. Results indicated that the SMT had a stable multilayer structure, and the variations in temperature, DO, pH, and nutrient concentration in the SMT were similar to those in the natural marine thermocline. There were two forms of E690 steel corrosion in the SMT: galvanic corrosion and seawater corrosion. The corrosion rate of seawater corrosion was influenced by the DO concentration. Galvanic corrosion occurred after the intrusion of E690 steel into the marine thermocline. The driver of galvanic corrosion was the difference values for Ecorrs of E690 steel at various depths of the marine thermocline. The Ecorr of E690 steel was influenced by the temperature, pH, and DO of the seawater, in the following order: DO >> T > pH. The continuous reduction in Ecorr with depth contributed to large-scale galvanic corrosion, and the oscillation variation in Ecorr with depth was the reason for small-scale galvanic corrosion. The primary anodic regions of galvanic corrosion were located in the area with the fastest temperature variation in the thermocline, and the position of the anodic regions rose with time. The anodic regions gradually expanded with time. The proportion of galvanic corrosion in the average corrosion rate could increase up to approximately 80% in the stable anodic region. There were many hemispherical corrosion pits on the surface of the single electrodes that were at the depths of 75 cm, 105 cm, and 135 cm. These single electrodes comprised a long-term, sustainable anodic region of galvanic corrosion.

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Wake effect impact on the levelized cost of energy in large floating offshore wind farms: A case of study in the northwest of the Iberian Peninsula

Thomas,

Costoya,

deCastro

et al. 2024

Energy

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Trends in floating offshore wind platforms: A review of early-stage devices

Cited by 7 publications

References 44 publications

Exploring Motion Stability of a Novel Semi-Submersible Platform for Offshore Wind Turbines

Exploring Motion Stability of a Novel Semi-Submersible Platform for Offshore Wind Turbines

Galvanic Corrosion of E690 Offshore Platform Steel in a Simulated Marine Thermocline

Wake effect impact on the levelized cost of energy in large floating offshore wind farms: A case of study in the northwest of the Iberian Peninsula

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