Enhancing power extraction in bottom-hinged flap-type wave energy converters through advanced power take-off techniques

Senol, Koray; Raessi, Mehdi

doi:10.1016/j.oceaneng.2019.04.067

Cited by 15 publications

(4 citation statements)

References 13 publications

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“…where P w denotes the time-averaged power extracted by PTO system and E 0 the time-averaged energy flux of incident wave. Following the work of Senol et al [45], the extracted power P w can be computed as…”

Section: Computational Efficiencymentioning

confidence: 99%

An efficient fully Lagrangian solver for modeling wave interaction with oscillating wave energy converter

Zhang¹,

Wei²,

Dias³

et al. 2020

Preprint

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In this paper, we present an efficient, accurate and fully Lagrangian numerical solver for modeling wave interaction with oscillating wave energy converter (OWSC). The key idea is to couple SPHinXsys, an open-source multi-physics library in unified smoothed particle hydrodynamic (SPH) framework, with Simbody which presents an object-oriented Application Programming Interface (API) for multi-body dynamics. More precisely, the wave dynamics and its interaction with OWSC is resolved by Riemann-based weakly-compressible SPH method using SPHinXsys, and the solid-body kinematics is computed by Simbody library. Numerical experiments demonstrate that the proposed solver can accurately predict the wave elevations, flap rotation and wave loading on the flap in comparison with laboratory experiment. In particularly, the new solver shows optimized computational performance through CPU cost analysis and comparison with commercial software package ANSYS FLUENT and other SPH-based solvers in literature. Furthermore, a linear damper is applied for imitating the power take-off (PTO) system to study its effects on the hydrodynamics properties of OWSC and efficiency of energy harvesting. In addition, the present solver is used to model extreme wave condition using the focused wave approach to investigate the extreme loads and motions of OWSC under such extreme wave conditions. It worth noting that though the model validation used herein is a bottom hinged oscillating Wave Energy Converter (WEC), the obtained numerical results show promising potential of the proposed solver to future applications in the design of high-performance WECs.

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Section: Computational Efficiencymentioning

confidence: 99%

An efficient fully Lagrangian solver for modeling wave interaction with oscillating wave energy converter

Zhang¹,

Wei²,

Dias³

et al. 2020

Preprint

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“…In [61] a new power take-off technique is proposed for oscillating wave surge WECs. The main innovation is to avoid any kind of braking system while keeping the amplitude within the specified range.…”

Section: Othersmentioning

confidence: 99%

Control Strategies Applied to Wave Energy Converters: State of the Art

Maria-Arenas¹,

Garrido

Rusu

et al. 2019

Energies

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Wave energy’s path towards commercialization requires maximizing reliability, survivability, an improvement in energy harvested from the wave and efficiency of the wave to wire conversion. In this sense, control strategies directly impact the survivability and safe operation of the device, as well as the ability to harness the energy from the wave. For example, tuning the device’s natural frequency to the incoming wave allows resonance mode operation and amplifies the velocity, which has a quadratic proportionality to the extracted energy. In this article, a review of the main control strategies applied in wave energy conversion is presented along their corresponding power take-off (PTO) systems.

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“…By taking all the mentioned reasons into account, recent studies have focused on enhancing the performance of wave energy technologies by developing optimisation-based solutions in the section of geometric design, PTO parameters, and layout. The second division proved to have a crucial role in energy transmission and exploitation in electricity networks [6]. While the energy sector is developing different technologies in this area, some challenges still need to be dealt with, such as design limitations [7], operation and maintenance difficulties in offshore area, power take-off efficiency under heavy currents, etc.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Metaheuristic Algorithms for Wave Energy Converter Power Take-Off Optimisation: A Case Study for Eastern Australia

Amini

Golbaz

Asadi

et al. 2021

JMSE

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One of the most encouraging sorts of renewable energy is ocean wave energy. In spite of a large number of investigations in this field during the last decade, wave energy technologies are recognised as neither mature nor broadly commercialised compared to other renewable energy technologies. In this paper, we develop and optimise Power Take-off (PTO) configurations of a well-known wave energy converter (WEC) called a point absorber. This WEC is a fully submerged buoy with three tethers, which was proposed and developed by Carnegie Clean Energy Company in Australia. Optimising the WEC’s PTO parameters is a challenging engineering problem due to the high dimensionality and complexity of the search space. This research compares the performance of five state-of-the-art metaheuristics (including Covariance Matrix Adaptation Evolution Strategy, Gray Wolf optimiser, Harris Hawks optimisation, and Grasshopper Optimisation Algorithm) based on the real wave scenario in Sydney sea state. The experimental achievements show that the Multiverse optimisation (MVO) algorithm performs better than the other metaheuristics applied in this work.

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Enhancing power extraction in bottom-hinged flap-type wave energy converters through advanced power take-off techniques

Cited by 15 publications

References 13 publications

An efficient fully Lagrangian solver for modeling wave interaction with oscillating wave energy converter

An efficient fully Lagrangian solver for modeling wave interaction with oscillating wave energy converter

Control Strategies Applied to Wave Energy Converters: State of the Art

A Comparative Study of Metaheuristic Algorithms for Wave Energy Converter Power Take-Off Optimisation: A Case Study for Eastern Australia

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