Numerical Simulation of a Dual-Chamber Oscillating Water Column Wave Energy Converter

Ning, Dezhi; Wang, Rong-quan; Zhang, Chongwei

doi:10.3390/su9091599

Cited by 53 publications

(14 citation statements)

References 39 publications

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“…Dual-chamber devices were installed on a floating breakwater for wave energy extraction by He et al (2012He et al ( , 2013. A dual-chamber OWC-WEC, which has two subchambers with a shared orifice, was proposed by Ning et al (2017), and the effects of the chamber geometry on the variation of surface elevation and water column volume in the two subchambers were studied. accurately measure the wave power of floating OWC with wider chamber breadth in the experiments for the first time and discussed the power extraction performance of a floating breakwater with dual-chamber devices.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis of Jacket Platform Integrated With Oscillating Water Column Device

et al. 2020

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For the marginal oilfield with low oil extraction, adding wave energy conversion device integration to the jacket platform is very meaningful for reducing the mining cost. First, the design concept of integrated oscillating water column (OWC) device with jacket platform is proposed. Then, the optimal model of OWC device structural arrangement parameters is established with the aim of low wave force and high wave energy conversion efficiency. Finally, the dynamic response of the integrated device is analyzed under the working and extreme sea states. The results show that the integrated device has certain effectiveness and feasibility.

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Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis of Jacket Platform Integrated With Oscillating Water Column Device

et al. 2020

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“…Their results show that the overall performance of the proposed device, compared with the single-chamber OWC device, can be significantly improved over a wider incident wave-frequency range. A fixed OWC WEC, which is composed of two sub-chambers with a shared orifice, was explored by Ning et al [16], using the higher-order boundary element method to mainly examine the effects of the chamber geometry on the surface elevations and pressure drops inside these two sub-chambers. They concluded that the fluctuation of water columns was strongly dependent on the wave properties, and a larger wavelength could lead to a more violently oscillating water surface.…”

Section: Introductionmentioning

confidence: 99%

Wave Power Extraction from a Dual Oscillating-Water- Column System Composed of Heave-Only and Onshore Units

et al. 2019

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With the aim of broadening the wave-frequency bandwidth of high-efficiency, a small-scaled dual oscillating-water-column (OWC) system consisting of two heave-only and onshore units was numerically investigated by a well-validated computational fluid dynamics (CFD) model. Based on the popular open source package OpenFOAM, the volume of fluid (VOF) method was employed to track the transformation of the air–water interface under the excitation of regular waves. The six degree of freedom (6DOF) solver was applied to duplicate the heaving motion of the floating device. The effects of the two chamber widths b 1 and b 2 , the vertical restraint force (represented by the dimensionless stiffness coefficient K), the back-lip draught d 2 of the floating device, and the gap Δ L between the two OWCs on the hydrodynamic characteristics and the wave energy conversion efficiencies were examined. The numerical results show that a larger width ratio b 2 / b 1 with a relatively shallow back-lip draught is more conducive to the high-performance over a broader frequency range. The floating device with a stronger vertical restraint force is more satisfactory for the high-performance of the system. Moreover, a relatively small gap is more recommended in the stage of design and construction.

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“…Rezanejad et al (2013Rezanejad et al ( , 2015 adopted BEM method to analyse 2 the efficiency of a two-dimensional nearshore multiple OWC devices placed over flat bottom and 3 stepped bottom, respectively. Ning et al (2015Ning et al ( , 2017) applied a fully nonlinear numerical wave 4 flume based on higher-order BEM in simulating of both one-chamber and dual-chamber OWC 5 devices. Numerical results indicated that the surface elevations in the two sub-chambers are 6 strongly dependent on the wave conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Later, Falnes and McIver (1985) applied analytical method to study the 24 power absorption by an OWC, which is composed of two vertical barriers with unequal length, 25 oscillating in the surge mode. It was shown that all of the incident wave power can be captured by 26 the system with optimum values of the complex oscillation amplitudes. Sarmento analytically investigated by Boccotti (2007) and Malara and Arena (2013).…”

Section: Introductionmentioning

confidence: 99%

Analytical study on wave power extraction from a hybrid wave energy converter

Zheng

Zhang

2018

Ocean Engineering

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In this paper, a hybrid wave energy converter (WEC) is proposed, consisting of a fixed 3 inverted flume with long length and a bottom hole, and a long floating cube hinged with the 4 flume. The inverted flume and the long floating cube works as an oscillating water column 5(OWC) and a rotational float, respectively, to capture power from incident waves. To study the 6 performance of this hybrid WEC, analytical solution of the wave diffraction/radiation problems, 7considering the hydrodynamic interaction between the OWC and the float, is derived based on 8 linear potential flow theory and eigen-function expansion matching method in the two-9dimensional Cartesian coordinate systems. The corresponding hydrodynamic coefficients, such as 10 wave excitation forces, added mass and wave radiation damping, are also obtained, which can be 11further used in evaluation of the maximum theoretical power absorption of the hybrid WEC. 12Results are compared with a parallel study of an isolated OWC and an isolated float. 13Additionally, analytical study on power capture capability of the device for various geometrical 14parameters is then carried out. 15

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Numerical Simulation of a Dual-Chamber Oscillating Water Column Wave Energy Converter

Cited by 53 publications

References 39 publications

Dynamic Response Analysis of Jacket Platform Integrated With Oscillating Water Column Device

Dynamic Response Analysis of Jacket Platform Integrated With Oscillating Water Column Device

Wave Power Extraction from a Dual Oscillating-Water- Column System Composed of Heave-Only and Onshore Units

Analytical study on wave power extraction from a hybrid wave energy converter

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