Experimental study of wave energy converter arrays adapted to a semi-submersible wind platform

Kamarlouei, Mojtaba; Gaspar, J.F.; Calvário, Miguel; Hallak, Thiago S.; Mendes, Mário J. G. C.; Thiebaut, Florent; Soares, C. Guedes

doi:10.1016/j.renene.2022.02.014

Cited by 42 publications

(11 citation statements)

References 31 publications

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“…Passive dampers with 𝐵 𝑚𝑒𝑐ℎ = 2x10 9 Nms/rad were found to give close to optimum average power and have been used throughout, although power is only slightly sensitive to this value. The dependence of average power on a wide range of 𝐵 𝑚𝑒𝑐ℎ is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

A wind semi-sub platform with hinged floats for omnidirectional swell wave energy conversion

Stansby,

2023

Preprint

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The capacity of wind turbines on offshore wind platforms is presently much greater than that for wave energy conversion. However wind availability with speed greater than 5 m/s, just above cut in, is typically 30-40% requiring storage to provide uniformity of supply, but this may be improved by adding swell wave energy conversion with typical availability of 90%. A hybrid platform is considered with three effectively rigid cylindrical floats connected by beams at right angles to support a wind turbine with its base on the central float, and two wave energy floats, opposite the wind floats, with beams at 90o and hinges with dampers for mechanical energy absorption on the central float. With swell periods over 10 s pitch resonance may be achieved with the fore and aft floats about half a wavelength apart with anti-phase forcing causing a moment on hinges above water level. The NREL 5 MW wind turbine is incorporated and average swell wave power absorption in significant wave heights of 2 m is over 200 kW. The analysis is by time domain linear diffraction-radiation modelling validated for other multi-float configurations. Significant wave energy conversion is omnidirectional over a wide range of heading angles. An added benefit is that in larger waves associated with strong winds, when the wave energy conversion would be disengaged, the wave float rotation on free hinges reduces the hub accelerations below that for rigid floats, enabling a longer time for wind power generation.

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Section: Resultsmentioning

confidence: 99%

A wind semi-sub platform with hinged floats for omnidirectional swell wave energy conversion

Stansby,

2023

Preprint

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“…They adopted EXP methods to study the interactions between WECs and WT platform. A 3-WEC [136], 6-WEC [137] and 12-WEC [138] configurations are deployed, as shown in figure 35.…”

Section: Semi-submersible Type 4371 Point Absorbers Combinationmentioning

confidence: 99%

“…Both methods have the same effects on the thrust force of the rotor, and the pitch angle of the rotor can be adjusted manually or automatically. Kamarlouei et al [136] designed a mass-pulley system to simulate the dominating wind thrust on the WT, as shown in figure 44. In terms of WEC sub-system, PTO is vital.…”

Section: Physical Model Testmentioning

confidence: 99%

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A state-of-the-art review of the hybrid wind-wave energy converter

Dong

et al. 2022

Prog. Energy

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The urgent demand for energy structural reform and the limitations of single energy development have promoted the combination of wind energy and wave energy. A hybrid energy system means that two or more energy devices share the same foundation. It reduces the levelized cost of energy (LCOE) and improves competitiveness through infrastructure sharing and increased power output. This paper starts with the development of the joint resources of wind and wave energies, then introduces the foundation forms of the hybrid system. It reviews the latest concepts and devices proposed with the integration of wind energy and wave energy, according to the foundation forms, and makes a preliminary assessment of the synergies of the hybrid system. The existing study methods of the hybrid systems are summarized. In view of the challenges faced by the development of hybrid energy systems, several suggestions are put forward accordingly. This paper provides a comprehensive guideline for the future development of the hybrid wind-wave energy converter (W-WEC) system.

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“…The DeepCWind platform is one among various configurations of FOWT that have been considered in MUP studies, such as the Mermaid semi-submersible with Oscillating Water Columns (OWCs) [42]. More recent conceptual designs are the spar platform with surge flaps and a tidal current converter [43], the concentric WEC-array adapted to semi-submersible wind platforms [44], and the FOWT proposed with a desalination plant and a solar deck [45], cite a few.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Analysis of the WIND-Bos Spar Floating Offshore Wind Turbine

Hallak

Soares

Sainz³

et al. 2022

JMSE

Self Cite

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The WIND-bos spar Floating Offshore Wind Turbine is studied both experimentally and numerically. The experimental model of the moored WIND-bos platform is presented, and the different numerical models that have been developed to analyze the hydrodynamics of the platform are described. The results provide a detailed comparison of numerical and experimental motion responses of the floating structure in regular and irregular waves. The numerical study includes frequency domain results from spectral analysis, weakly nonlinear time-domain results from a validated in-house code, and coupled time-domain results from commercial software. The importance of damping calibration is put in evidence, whereas damping ratios are calculated iteratively in the coupled time-domain simulations, and nonlinear damping force is considered within the developed numerical scheme. The results compare well and also show that the novel concept has a good motion performance in general.

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Experimental study of wave energy converter arrays adapted to a semi-submersible wind platform

Cited by 42 publications

References 31 publications

A wind semi-sub platform with hinged floats for omnidirectional swell wave energy conversion

A wind semi-sub platform with hinged floats for omnidirectional swell wave energy conversion

A state-of-the-art review of the hybrid wind-wave energy converter

Hydrodynamic Analysis of the WIND-Bos Spar Floating Offshore Wind Turbine

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