Wave power extraction by multiple wave energy converters arrayed in a water channel resonator

Kim, Jeongrok; Cho, Il-Hyoung

doi:10.1016/j.ijnaoe.2021.02.004

Cited by 10 publications

(4 citation statements)

References 19 publications

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“…6. By adjusting the mass and stiffness parameters, the natural frequency of the presented system can reach the frequency of waves and a semi-resonance phenomenon will happen which increases the harvested power (Kim & Cho, 2021). This conclusion can be observed in the presented results.…”

Section: Resultssupporting

confidence: 69%

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Design and Optimization of a Rack and Pinion Type WEC Using an Auxiliary Vibrating System

Chand

Nasrekani

Mamun

et al. 2023

Int. J. Renew. Energy Dev.

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Research on wave energy converters with Rack and pinion type Power Take-Off (PTO) has been increasing over the last few years. A few control methods are used to optimize the performance of the said Wave Energy Converters (WECs). This paper presents a novel auxiliary vibrating system that can be implemented to improve the power input to a wave energy converter with a rack and pinion type PTO in regular waves. The design of the WEC system includes a floater, a double rack and pinion arrangement, a vibrating system, and a Mechanical Motion Rectifier (MMR) consisting of two one-way bearings that can convert the bidirectional wave motion to a unidirectional rotation of the output shaft. Once the waves move the floater upwards, this compresses the vibrating system which absorbs some of the energy and then the vibrating system helps the floater return to its original position by releasing the stored energy. The vibrating system also serves as a control method for limiting rack movement, so the impact of the waves is not detrimental to the system. This article aims to approximate the optimized power input to the system and investigate whether the implementation of a novel vibrating system improves the system power input. Allowing the WEC’s natural frequency to reach the wave’s natural frequency is important as it allows for maximum power absorption. The use of vibration systems to tune the WEC’s natural frequency close to the waves’ is novel and serves as the main factor in choosing this research. The WEC was modeled as 2 spring mass damper systems. Then the characteristic equations of the systems were extracted from the equations of motion and solved analytically to obtain the responses. One-factor-at-a-time (OFAT) method together with two different algorithms (Genetic and Multi-Start algorithms) from MATLAB code were used to optimize the response. The optimized power input to the system was then approximated. For system one, the maximum amplitude of the response was seen at a system mass of 500 kg and stiffness in the range of 100<k<240 N/m. The same was achieved for system two at a system mass of 500 kg and stiffness in the range of 100<k<138. The effect of the stiffness and mass on the response and input power has also been discussed.

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Section: Resultssupporting

confidence: 69%

“…The novel control mechanism did not require the prediction of the wave excitation force (Amin et al, 2021). Kim and Cho (2021) studied the wave power extracted from multiple WECs deployed in a Y-shaped water channel (Kim & Cho, 2021). Jiang et al (2021) presented a design and experimental study of a PTO system for Salter's Duck WEC.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of a Rack and Pinion Type WEC Using an Auxiliary Vibrating System

Chand

Nasrekani

Mamun

et al. 2023

Int. J. Renew. Energy Dev.

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“…For experimental research the hydrodynamic performance of a floating cylindrical oscillating water column (OWC) wave energy converter [11], where it was found that wave energy production can be affected by the elasticity of floats influencing the resonance frequency [12]; certain scales were established for the construction of wave tanks of point absorption to be able to take advantage of wave power [13], in addition to new systems for the capture of undimotriz independent directional energy of an OWC -Cylindrical WEC with the particular energy focus attribute of a parabolic reflector [14], also wave-driven buoy rolling power devices with a compact structure at the high level of the coastal environment [15]. In addition, an investigation was conducted into the extraction of wave energy by multiple wave energy converters (WEC) deployed in a Y-shaped water channel resonator (WCR) [16], the investigation allows to take advantage with multiple WEC in the long water channels and a V-shaped wave guide installed at the entrance of a water channel the period of the incident waves coincides with the natural periods of the fluid in a WCR, resonance occurs, As a result, the internal fluid in a WCR is greatly amplified, to estimate wave power [17]; it was also possible to classify according to the fields of application of wave energy technology in three generations [18]. According to this, an analysis is made on the behaviour of the waves and according to these calculations a better location of the converters is made [19], in addition it is possible to explain about the manufacture and operation of a prototype energy converter [20].…”

Section: Discussionmentioning

confidence: 99%

Electrical utilization through Wave Energy

Espejo Peña,

Palma Dávila,

Durand Onofre

et al. 2023

Proceedings of the 21th LACCEI International Multi-Conference for Engineering, Education and Technology (LACCEI 2023): “Leaders

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This systematic review starts with the purpose of offering a study on the use of wave energy in the coastal zone. Scopus, ScienceDirect, EBSCO and IOP Publishing search engines were used to collect information, starting with an unfiltered search of the topic to be investigated, thus obtaining a total of 10,125 documents; After applying a series of filters through the PRISMA selection process, a total of 31 articles were obtained, which were used for the final development of the systematic review. Finally, it is concluded that the use of a wave energy converter will depend on several factors: the type of converter, the areas where the converters are more efficient and the nature of the waves.

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“…Also, they have higher power density potential in comparison with other sources of renewable energy like solar and wind energy. Water waves give an opportunity to harness energy from the kinetic energy of flow through mechanical vibrations due to wave-instruction interaction [3,4].…”

Section: Introductionmentioning

confidence: 99%

A novel floating piezoelectric energy harvesting from water waves: fully-coupled simulation

Khorramdarreh,

Mohammadi,

Ghazanfarian

2023

Preprint

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A fully-coupled-fluid-structure-piezoelectric model is presented based on the finite element method that is capable of modeling piezoelectric harvesters in the presence of free-surface flow and floating lightweight harvesters with arbitrary movements. The Navier-Stokes equations and the phase-field method are employed to describe the free-surface waves. Equations of the conservation of linear momentum in company with the piezoelectric constitutive relations in the strain-charge form are utilized to obtain solid deformation and the electric field intensity. According to the results, attaching mass to the tip of the beam leads to 13.5% rise in the output voltage compared to the state without the attached mass. Another studied factor was the influence of the load resistance on voltage and the output power. The generated voltage grows along with the load resistance until it reaches a constant value. However, the power has an optimum load resistance that is 2.61 times higher than the reference state. The beam's inclination is significant in effectively exploiting water waves due to raising the root mean square (RMS) value of the voltage by 89.53% at an angle of 40 degrees relative to the vertical state. By altering the thickness of the beam from 1 mm to the value of 1.5 mm, the RMS voltage exhibits a considerable upward change of 66%. By increasing the length of the cantilever beam connected to the buoyant structure, and therefore, the indentation of the beam in the water, the output voltage grows, such that a beam with the length of 25 cm shows a 2.92 times increase in the output voltage relative to the beam with a length of 15 cm.

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Wave power extraction by multiple wave energy converters arrayed in a water channel resonator

Cited by 10 publications

References 19 publications

Design and Optimization of a Rack and Pinion Type WEC Using an Auxiliary Vibrating System

Design and Optimization of a Rack and Pinion Type WEC Using an Auxiliary Vibrating System

Electrical utilization through Wave Energy

A novel floating piezoelectric energy harvesting from water waves: fully-coupled simulation

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