Experimental modelling of a multi-use floating platform for wave and wind energy harvesting

Sarmiento, Javier; Iturrioz, Arantza; Ayllón, Víctor; Guanche, Raúl; Losada, Íñigo J.

doi:10.1016/j.oceaneng.2018.12.046

Cited by 93 publications

(36 citation statements)

References 12 publications

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“…De Backer et al [28] studied the performance of two array layouts of 12 heaving buoys in a staggered grid and 21 heaving buoys in an aligned grid in unconstrained and constrained conditions in unidirectional irregular waves. Sarmiento et al [29] experimentally studied the performance of a multi-use triangular semi-submersible platform equipped with a 5MW wind turbine supported in the central column and three OWCs placed around the external columns. Michele et al [30] developed a mathematical model to analyze the hydrodynamics of a novel OWC in a hybrid wind-wave energy system in regular and random waves, and validated it with the experiment by Perez-Collazo et al [31].…”

Section: Introductionmentioning

confidence: 99%

Optimal design and performance analysis of a hybrid system combing a floating wind platform and wave energy converters

et al. 2020

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Combined floating offshore wind platform and wave energy converter (WECs) systems have the potential to provide a cost-effective solution to offshore power supply and platform protection. The objective of this paper is to optimize the size and layout of WECs within the hybrid system under a given sea state with a numerical study. The numerical model was developed based on potential flow theory with viscous correction in the frequency domain to investigate the hydrodynamic performance of a hybrid system consisting of a floating platform and multiple heaving WECs. A non-dimensional method was presented to determine a series of variables, including radius, draft, and layout of the cylindrical WEC at a typical wave frequency as the initial design. WECs with larger diameter to draft ratio were found to experience relatively smaller viscous effects, and achieve more wave power, larger effective frequency range and similar wave power per unit volume in the same sea state. The addition of WECs reduced the maximum horizontal force and pitch moment on the platform, whereas the maximum vertical force increased due to the increasing power take-off force, especially at low frequencies. The results presented in this paper provide guidance for the optimized design of WECs and indicate the potential for synergies between wave and wind energy utilization on floating platforms.

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Section: Introductionmentioning

confidence: 99%

Optimal design and performance analysis of a hybrid system combing a floating wind platform and wave energy converters

et al. 2020

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“…There are many articles using combined FOWT and Wave Energy Converters (WEC) to create a multi-purpose platform that absorbs both wind and wave energies [27][28][29][30][31]. However, there are a few articles proposing OWCs included in FOWTs with stabilization as the main objective.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis on the Use of Oscillating Water Column in Barge-Based Floating Offshore Wind Turbines

et al. 2021

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Undesired motions in Floating Offshore Wind Turbines (FOWT) lead to reduction of system efficiency, the system’s lifespan, wind and wave energy mitigation and increment of stress on the system and maintenance costs. In this article, a new barge platform structure for a FOWT has been proposed with the objective of reducing these undesired platform motions. The newly proposed barge structure aims to reduce the tower displacements and platform’s oscillations, particularly in rotational movements. This is achieved by installing Oscillating Water Columns (OWC) within the barge to oppose the oscillatory motion of the waves. Response Amplitude Operator (RAO) is used to predict the motions of the system exposed to different wave frequencies. From the RAOs analysis, the system’s performance has been evaluated for representative regular wave periods. Simulations using numerical tools show the positive impact of the added OWCs on the system’s stability. The results prove that the proposed platform presents better performance by decreasing the oscillations for the given range of wave frequencies, compared to the traditional barge platform.

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“…Some papers have proposed hybrid FOWT-WEC for multi-functional aims of wind and wave supplies extractions. J. Sarmiento et al in [19] performed an experimental work to validate a novel hybrid FOWT-OWC semi-submersible floater. This combined system maximizes the wave energy production by chamber opening.…”

Section: Introductionmentioning

confidence: 99%

Switching Control Strategy for Oscillating Water Columns Based on Response Amplitude Operators for Floating Offshore Wind Turbines Stabilization

et al. 2021

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In this article, a new strategy for switching control has been proposed with the aim of reducing oscillations in floating offshore wind turbines. Such oscillations lead to a shortage in the system’s efficiency, lifespan and harvesting capability of wind and wave energies. In order to study the decreasing of undesired oscillations in the system, particularly in pitch and top tower fore-aft movements, a square-shaped platform barge equipped with four symmetric oscillating water columns has been considered. The oscillating water columns’ air flux valves allow to operate the air columns so that to control the barge movements caused by oscillatory motion of the waves. In order to design the control scheme, response amplitude operators have been used to evaluate the performance of the system for a range of wave frequency profiles. These response amplitude operators analysis makes it possible to implement a switching control strategy to adequately regulate the valves opening/closing transition. The obtained results show that the proposed controlled oscillating water column-based barge present a better performance compared to the traditional barge one. In the case study with the period of 10 s, the results indicate the significant oscillation reduction for the controlled oscillating water column-based system compared to the standard barge system by 30.8% in pitch angle and 25% in fore-aft displacement.

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Experimental modelling of a multi-use floating platform for wave and wind energy harvesting

Cited by 93 publications

References 12 publications

Optimal design and performance analysis of a hybrid system combing a floating wind platform and wave energy converters

Optimal design and performance analysis of a hybrid system combing a floating wind platform and wave energy converters

Performance Analysis on the Use of Oscillating Water Column in Barge-Based Floating Offshore Wind Turbines

Switching Control Strategy for Oscillating Water Columns Based on Response Amplitude Operators for Floating Offshore Wind Turbines Stabilization

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