Experimental investigation of semi-submersible platform combined with point-absorber array

Sun, Ke; Yang, Yi; Zheng, Xing; Cui, Limei; Zhao, Chuankai; Liu, Mingyao; Xiang, Rong

doi:10.1016/j.enconman.2021.114623

Cited by 34 publications

(15 citation statements)

References 27 publications

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“…Sun et al performed experiments with a three-pontoon semisubmersible platform with six point-absorber WECs [54]. The platform was constructed on a 1:40 scale with a simplified hydraulic PTO system and a mooring system to restrict the platform movement.…”

Section: Three-pontoon Semisubmersible Platform With Six Wecsmentioning

confidence: 99%

“…The study aimed to clarify the interaction between the floating platform and the WEC array, without taking the influence of the wind turbine into account. The effect of the floating platform on the energy conversion of the WECs and the effect of the WECs on the hydrodynamic performance of the platform were investigated [54].…”

Section: Three-pontoon Semisubmersible Platform With Six Wecsmentioning

confidence: 99%

“…The RAO was defined by the ratio of the heave amplitude z and the wave amplitude η. The hydraulic power output for each of the six WECs was presented for the configurations displayed in Figure 17b [54].…”

Section: Three-pontoon Semisubmersible Platform With Six Wecsmentioning

confidence: 99%

“…For each experimental campaign, labelled with a campaign ID, the authors, year, wave testing facility and DOFs for a single WEC are summarised. The identified experimental campaigns have been carried out over the last 15 [9][10][11][12]42,54]. The other campaigns considered a scaled model of a WEC concept which was targeted for a full-scale ocean deployment in a WEC array.…”

Section: Wec Shapementioning

confidence: 99%

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Experimental Modelling of Point-Absorber Wave Energy Converter Arrays: A Comprehensive Review, Identification of Research Gaps and Design of the WECfarm Setup

Vervaet

Stratigaki

Backer

et al. 2022

JMSE

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Commercial wave energy exploitation will be realised by placing multiple wave energy converters (WECs) in an array configuration. A point-absorber WEC consists of a floating or submerged body to capture wave energy from different wave directions. This point-absorber WEC acts as an efficient wave absorber that is also an efficient wave generator. Optimising the WEC array layout to obtain constructive interference within the WEC array is theoretically beneficial, whereas for wind farms, it is only important to avoid destructive interference within an array of wind turbines due to wake effects. Moreover, the WEC array layout should be optimised simultaneously with the applied control strategy. This article provides a literature review on the state of the art in physical modelling of point-absorber WEC arrays and the identification of research gaps. To cover the scientific gap of experimental data necessary for the validation of recently developed (nonlinear) numerical models for WEC arrays, Ghent University has introduced the “WECfarm” project. The identified research gaps are translated into design requirements for the “WECfarm” WEC array setup and test matrix. This article presents the design of the “WECfarm” experimental setup, consisting of an array of five generic heaving point-absorber WECs. The WECs are equipped with a permanent magnet synchronous motor (PMSM), addressing the need for WEC array tests with an accurate and actively controllable power take-off (PTO). The WEC array control and data acquisition are realised with a Speedgoat Performance real-time target machine, offering the possibility to implement advanced WEC array control strategies in the MATLAB-Simulink model. Wave basin testing includes long- and short-crested waves and extreme wave conditions, representing real sea conditions. Within the “WECfarm” project, two experimental campaigns were performed at the Aalborg University wave basin: (a) a testing of the first WEC in April 2021 and (b) a testing of a two-WEC array in February 2022. An experimental campaign with a five-WEC array is under preparation at the moment of writing.

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Section: Three-pontoon Semisubmersible Platform With Six Wecsmentioning

confidence: 99%

Section: Three-pontoon Semisubmersible Platform With Six Wecsmentioning

confidence: 99%

Section: Three-pontoon Semisubmersible Platform With Six Wecsmentioning

confidence: 99%

Section: Wec Shapementioning

confidence: 99%

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Experimental Modelling of Point-Absorber Wave Energy Converter Arrays: A Comprehensive Review, Identification of Research Gaps and Design of the WECfarm Setup

Vervaet

Stratigaki

Backer

et al. 2022

JMSE

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“…Flow-induced vibration extensively exists in various forms of fluid-structure interaction machinery, including the wind turbine blades [1] , downhole oil pumping systems [2] , large offshore platforms [3][4] , and others [5][6][7] , and extremely harms the equipment operation. As a representative of fluid-structure interaction systems, the fluid-conveying pipe has drawn many researchers' attention [8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Resonance response of fluid-conveying pipe with asymmetric elastic supports coupled to lever-type nonlinear energy sink

Cao

Wang

Zang

et al. 2022

Appl. Math. Mech.-Engl. Ed.

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This paper studies the vibration absorber for a fluid-conveying pipe, where the lever-type nonlinear energy sink (LNES) and spring supports are coupled to the asymmetric ends of the system. The pseudo-arc-length method integrated with the harmonic balance method is used to investigate the steady-state responses analytically. Meanwhile, the numerical solution of the fluid-conveying pipe is calculated with the Runge-Kutta method. Moreover, a special response, called the collapsible closed detached response (CCDR), is first observed when the vibration response of mechanical structures is studied. Then, the relationship between the CCDR and the main structure primary response (PR) is obtained. In addition, the closed detached response (CDR) is also observed to research the resonance response of the fluid-conveying pipe. The appearance of either the CCDR or the CDR does affect the resonance attenuation. Furthermore, the mentioned two phenomena underline that the trend of vibration responses under external excitation goes continuous and gradual. Besides, the main advantage of the LNES is presented by contrasting the LNES with the nonlinear energy sink (NES) coupled to the same pipe system. It is found that the LNES can reduce the resonance response amplitude by 91.33%.

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Multi-Objective Optimal Design of the Wind-Wave Hybrid Platform with the Coupling Interaction

Deng,

Zhang,

Miao

et al. 2023

J. Ocean Univ. China

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Experimental investigation of semi-submersible platform combined with point-absorber array

Cited by 34 publications

References 27 publications

Experimental Modelling of Point-Absorber Wave Energy Converter Arrays: A Comprehensive Review, Identification of Research Gaps and Design of the WECfarm Setup

Experimental Modelling of Point-Absorber Wave Energy Converter Arrays: A Comprehensive Review, Identification of Research Gaps and Design of the WECfarm Setup

Resonance response of fluid-conveying pipe with asymmetric elastic supports coupled to lever-type nonlinear energy sink

Multi-Objective Optimal Design of the Wind-Wave Hybrid Platform with the Coupling Interaction

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