On the tuning of a wave-energy driven oscillating-water-column seawater pump to polychromatic waves

Godoy-Diana, Ramiro; Czitrom, Steven

doi:10.1016/j.oceaneng.2007.05.001

Cited by 5 publications

(5 citation statements)

References 13 publications

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“…The whole problem (the simulation of the movements of the inner free surface due to the excitation of the outer sea-waves) is split into two sub problems: an outer one, dealing with the incident, diffracted and radiated waves, solved once for all, and an inner one, concerning the inner water volume behavior. The tuning of an OWC sea-water pump to polychromatic waves was investigated (Godoy-Diana and Czitrom, 2007) to enhance the performance of OWC wave energy device within a resonant condition when the forcing wave maintained. The flow characteristics in the components of an oscillating water column (OWC) system used for the wave energy capture was predicted by a numerical modeling by using the FLUENT code (Marjani et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Numerical study of air chamber for oscillating water column wave energy convertor

2011

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Oscillating Water Column (OWC) wave energy converting system is one of the most widely used facilities all over the world. The air chamber is utilized to convert the wave energy into the pneumatic energy. The numerical wave tank based on the two-phase VOF model is established in the present study to investigate the operating performance of OWC air chamber. The RANS equations, standard k-turbulence model and dynamic mesh technology are employed in the numerical model. The effects of incident wave conditions and shape parameters on the wave energy converting efficiency are studied and the capability of the present numerical wave tank on the corresponding engineering application is validated.

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Section: Introductionmentioning

confidence: 99%

Numerical study of air chamber for oscillating water column wave energy convertor

2011

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“…For instance, Falcão [6] developed a theoretical analysis to describe the ocean wave energy absorption by a linear array of oscillating water columns of arbitrary geometry. Other fine aspects related with the operation of these devices and similar equipments were reported by Godoy-Diana and Czitrom [7] to study the tuning of a seawater pump driven by a oscillating water column, and more recently, Conde and Gato [8] clarified the role of the oscillat-ing water column on the dynamic characteristics of the airflow which is trapped inside a typical pneumatic chamber.…”

Section: Introductionmentioning

confidence: 66%

“…The above results are in concordance with the predictions of Figs. (7) and (8), since the maximum values of the work done satisfy also this condition. In those figures, when increases, the ocean wave frequency decreases and for this case, we have the maximum work generated by the compressed air.…”

Section: Numerical Predictions Of the Generated Workmentioning

confidence: 83%

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Numerical Predictions of the Generated Work in an Air-Compression Chamber Driven by an Oscillating Water Column

Bautista¹,

Méndez²,

Bautista³

2009

TOOEJ

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In the present work, we have studied the performance of an open compression chamber with compressed air and driven by an oscillating water column. Recognizing the existence of a free-surface for the water column, the interface position between the trapped-air and water volume -together with the motion of the column-, is described by a non-linear energy equation that reflects the main dynamic characteristics. The above governing equation is posed in dimensionless form and solved by conventional numerical methods. In addition, a theoretical approximation of the first order in to predict the resonant frequency of the oscillatory system is derived to complete the analysis. The numerical results of the above governing equation serve us to estimate the dimensionless work done by the oscillating water column as a function of three dimensionless parameters: a characteristic Froude number, , and two equivalent quasi-geometric parameters, and , defined below. The predictions show that the influence of the geometry and the involved physical parameters exert a great influence on work generation into the air-chamber.

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“…Other studies have used ESSs to mitigate short-term voltage fluctuations. However, in these applications, it has been found that the rating of the ESSs increases as the installed WEC power increases [14][15][16]. In [17], supercapacitors were used to improve wave farm power output at laboratory installations.…”

Section: Introductionmentioning

confidence: 99%

Wave Power Output Smoothing through the Use of a High-Speed Kinetic Buffer

et al. 2019

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In this paper, a new control strategy for power output smoothing in a hybrid wave energy installation coupled to a flywheel energy storage system (FESS) is proposed. The control scheme is composed by three stages: a wave generator clustering process at the farm connection point; a power filtering process; and the control of the flywheel energy storage in order to improve the power output of the hybrid wave farm. The proposed control is validated at the existing Lysekil Wave Energy Site located in Sweden, by using real generator measurements. Results show that the application of the flywheel energy storage system reduces the maximum peak power output from the wave energy installation by 85% and the peak/average power ratio by 76%. It is shown that the proposed system can reduce grid losses by 51%, consequently improving the energy efficiency of the power network. The application of the proposed control strategy allows the hybrid wave power plant to follow a power reference signal that is imposed by the grid operator. In addition, the study demonstrates that the application of the proposed control allows the hybrid wave power plant to follow a power reference signal that is imposed by the grid operator. In addition, the study demonstrates that the application of the proposed control enables a wave farm with flywheel energy storage to be a controllable, flexible resource in order to fulfill future grid code requirements for marine energy installations.

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On the tuning of a wave-energy driven oscillating-water-column seawater pump to polychromatic waves

Cited by 5 publications

References 13 publications

Numerical study of air chamber for oscillating water column wave energy convertor

Numerical study of air chamber for oscillating water column wave energy convertor

Numerical Predictions of the Generated Work in an Air-Compression Chamber Driven by an Oscillating Water Column

Wave Power Output Smoothing through the Use of a High-Speed Kinetic Buffer

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