Frequency-domain hydrodynamic modelling of dense and sparse arrays of wave energy converters

Wei, Yanji; Berglind, Jose de Jesus Barradas; Yu, Zhiheng; Rooij, Marijn van; Prins, W.; Jayawardhana, Bayu; Vakis, Antonis I.

doi:10.1016/j.renene.2018.12.022

Cited by 9 publications

(5 citation statements)

References 20 publications

(35 reference statements)

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“…via an umbilical to the surface). For the purposes of this research, we account for the presence of the central pillar and incorporate its radiation effects on the floaters [27]. The PTO system coupled to each floater comprises a piston moving within a pipe that connects the internal reservoir to the external flexible bladder (Fig.…”

Section: The Ocean Grazer Wec (Og-wec)mentioning

confidence: 99%

Analysing the Influence of Power Take-Off Adaptability on the Power Extraction of Dense Wave Energy Converter Arrays

Bechlenberg

Wei²,

Jayawardhana

et al. 2022

SSRN Journal

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Section: The Ocean Grazer Wec (Og-wec)mentioning

confidence: 99%

Analysing the Influence of Power Take-Off Adaptability on the Power Extraction of Dense Wave Energy Converter Arrays

Bechlenberg

Wei²,

Jayawardhana

et al. 2022

SSRN Journal

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“…In this study, the hydrodynamic coefficients with the two-body interaction were obtained using the BEM-Processes 2021, 9, 1721 6 of 18 based frequency-domain hydrodynamic solver WAMIT. The equation of the motion of the floats, considering the hydrodynamic interaction, can be expressed in terms of complex amplitude as follows [25,36]:…”

Section: External Forces Acting On the Floating Bodymentioning

confidence: 99%

Dynamic Response Analysis of a Wavestar-Type Wave Energy Converter Using Augmented Formulation in Korean Nearshore Areas

Heo

Koo

2021

Processes

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Interest in water wave power generation, a promising source of renewable energy, is increasing. Numerous types of wave energy converters (WECs) have been designed to transform wave energy into electricity. In this study, we focus on heaving point absorbers (HPAs) of the Wavestar type, which consist of multiple floats connected to a bottom-fixed ocean structure by structural arms and hinges. Each float moves up and down due to wave forces and produces electricity using the hydraulic power take-off (PTO) system connected directly to the float. A numerical procedure using the three-dimensional augmented formulation was developed to calculate the rotational motion of the float. The frequency-dependent coefficients were calculated using the hydrodynamic solver WAMIT. The nonlinear Froude–Krylov and hydrostatic forces were considered. For the environmental conditions, the wave data of four nearshore areas in Korea, obtained from the Korea Meteorological Administration (KMA), were used. Under the given environmental conditions, Buan was found to be the most suitable area among the locations selected for installing a Wavestar-type WEC without considering installation and maintenance costs.

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“…This subject for WECs is more challenging and uncertain due to the absorption, radiation, and diffraction of waves from multiple WEC bodies in the farm [3]. These wave-structure effects caused by the WEC operation in an array could influence the power absorbance [4] which emerges studies on layout optimization [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

“…It should be no surprise that the diversity of WEC concepts shows various destructive or constructive effects of WECs in a farm [7], [9], [10]. Therefore, there is no specific layout scheme that the whole industry can settle for it.…”

Section: Introductionmentioning

confidence: 99%

Performance Modelling of Flap-Type Wave Energy Converter Array: Flaps With Various Dynamic Characteristics

Saeidtehrani

Lavidas

2022

Volume 8: Ocean Renewable Energy

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Generally, it is expected that the total power of N energy converters in an array will be less than N times the power of a single operative converter. The goal of this paper is to enhance the oscillation of the flap-type WEC and consequently the energy extraction of the whole array in front of a coastal structure. Flaps in an array show different response patterns in terms of amplitude and frequency based on their dynamic characteristics, incoming wave frequencies, and the distance between the WECs. Through this work, different dynamic characteristics for each flap in combination with various distances between proximate flaps are investigated. An experimentally validated numerical model developed for the simulation of flap-type WEC operating as single and in an array is used for the simulation. The effects of dynamic characteristics and WEC distances on the response and power production are estimated and discussed in detail for a flap operating in an array of two and five. It is shown that by changing the distance between two flaps, the response is enhanced up to 20%. The findings suggest the most efficient ratio of dynamic characteristics of flaps in an array of two is having a period half to the incoming wave period. However, for an array of five, having staggered flaps with a period equal to the incoming wave period make a 4% increase in the overall response of each flap.

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Frequency-domain hydrodynamic modelling of dense and sparse arrays of wave energy converters

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Cited by 9 publications

References 20 publications

Analysing the Influence of Power Take-Off Adaptability on the Power Extraction of Dense Wave Energy Converter Arrays

Analysing the Influence of Power Take-Off Adaptability on the Power Extraction of Dense Wave Energy Converter Arrays

Dynamic Response Analysis of a Wavestar-Type Wave Energy Converter Using Augmented Formulation in Korean Nearshore Areas

Performance Modelling of Flap-Type Wave Energy Converter Array: Flaps With Various Dynamic Characteristics

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