A numerical study of a taut-moored point-absorber wave energy converter with a linear power take-off system under extreme wave conditions

Tagliafierro, Bonaventura; Martínez-Estévez, Iván; Domínguez, José M.; Crespo, A. J. C.; Göteman, Malin; Engström, Jens; Gómez‐Gesteira, M.

doi:10.1016/j.apenergy.2022.118629

Cited by 33 publications

(13 citation statements)

References 68 publications

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“…Khayyer et al (2022) reviewed state-of-the-art fluid-structure interaction solvers based on Lagrangian meshfree methods and highlighted their robustness in extreme events, addressing the need for comprehensive structural responses, including viscoelasticity and solid fracture (Ng et al, 2022). As pointed out by Tagliafierro et al (2022), the SPH method overcomes the limitations of mesh-based solvers, which often encounter distortion problems when modelling significant deformations in complex geometries or free surfaces. These traditional solvers require periodic remeshing to maintain an accurate representation of the deformed geometry.…”

Section: Fluid Densitymentioning

confidence: 99%

Numerical Simulation of a Flexible Net in Currents with the Smoothed Particle Hydrodynamics Method

González,

Martínez Estévez,

Domínguez

et al. 2023

Preprint

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Section: Fluid Densitymentioning

confidence: 99%

Numerical Simulation of a Flexible Net in Currents with the Smoothed Particle Hydrodynamics Method

González,

Martínez Estévez,

Domínguez

et al. 2023

Preprint

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“…2 It is estimated that the global potential power carried by the waves in the sea is about 10 13 W, 3 which can reach 60% of the world's energy consumed (16 TW) per year. 4 In addition, it also benefits from the wide distribution, so wave energy has been extensively studied, 5,6 particularly by coastal countries.…”

Section: Introductionmentioning

confidence: 99%

Oscillating body wave energy conversion efficiency based on Simulink simulation training

Yin,

Lu,

et al. 2024

Energy Science & Engineering

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With the development of the economy and society, we are faced with the dual challenges of energy demands and environmental pollution. As one of the important marine renewable energies, wave energy is widely distributed and abundant, and has considerable applications in various fields. Oscillating body wave energy converter (WEC) is most popular among WECs; its energy conversion efficiency is thus one of the key issues for practical large‐scale applications. This article establishes a new model of the float and vibrator under different motion conditions, conducts simulation training, and then solves the displacement and velocity at different times, and finally optimizes the maximum output power and optimal damping coefficient. Simulink calculation is one of the most effective tools including neural networks, which allows us to achieve intelligent training and simulation. The obtained data imply that the maximum output power could be 8.102 W when the corresponding linear damping is 21,000 N s/m and the rotation damping is 95,000 N s/m. The article takes into account the pitching motion of the float, providing a more realistic model and obtaining optimal power absorbing efficiency. The obtained results could be the potential reference data in practically setting up the wave energy conversion systems.

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“…38 Within the Smoothed Particle Hydrodynamics (SPH) framework, numerical simulations were conducted to model a tautmoored point-absorber wave energy converter together with a linear power takeoff device system in focused wave groups, which seamlessly exploited its functions of energy harvesting and load bearing in such wave conditions. 39 The response of a multi-body wave energy converter system known as M4 in focused wave groups, which consists of three cylindrical floats with rounded bases, was investigated mainly by experiments. It was shown that the WEC system response is predominantly linear, with weak nonlinearity in beam bending moment.…”

Section: Introductionmentioning

confidence: 99%

Harmonic structure of the nonlinear force on a fixed ship-shaped floating production, storage and offloading vessel under dispersive phase-focused wave groups

2023

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This paper presents a numerical investigation on the harmonic structure of hydrodynamic forces on a fixed and simplified representative floating production, storage and offloading (FPSO) vessel hull under dispersive phase-focused wave groups. The high-fidelity numerical model utilizes the two-phase flow solver in the open-source toolbox OpenFOAM. A series of cases were computed using the numerical model, where the effects of wave steepness, bow diameter, and length of the FPSO are investigated. It is found that given an FPSO under different wave steepness, the non-dimensional inline force exhibits remarkable similarity in terms of the temporal development. The harmonic structure of the inline force is only weakly dependent on the steepness of the incident wave group and the bow diameter, but strongly dependent on the FPSO length. When [Formula: see text], where L is the length of the FPSO and kp is the wave number at peak frequency, the incident wave group is diffracted significantly by the FPSO. The entire wave–structure interaction process is largely linear, where transfer between different harmonics is rarely seen. However, when kpL is further reduced to 0.57, globally the disturbance of the FPSO on the far field incident wave group is reduced, but locally a strongly nonlinear flow occurs at the rear of the FPSO, where severe run-up occurs at the downstream stagnation point. Higher-order harmonics of inline forces are excited, and the interaction process becomes much more nonlinear.

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A numerical study of a taut-moored point-absorber wave energy converter with a linear power take-off system under extreme wave conditions

Cited by 33 publications

References 68 publications

Numerical Simulation of a Flexible Net in Currents with the Smoothed Particle Hydrodynamics Method

Numerical Simulation of a Flexible Net in Currents with the Smoothed Particle Hydrodynamics Method

Oscillating body wave energy conversion efficiency based on Simulink simulation training

Harmonic structure of the nonlinear force on a fixed ship-shaped floating production, storage and offloading vessel under dispersive phase-focused wave groups

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