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Sustainability 2017, 9(9), 1599; doi:10.3390/su9091599

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

1,2,3,* , 1,2
and
1,2,3
1
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
2
Offshore Renewable Energy Research Center, Dalian University of Technology, Dalian 116024, China
3
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
*
Author to whom correspondence should be addressed.
Received: 16 August 2017 / Revised: 2 September 2017 / Accepted: 5 September 2017 / Published: 7 September 2017
(This article belongs to the Special Issue Wave Energy Technologies: A Sustainable Energy Source)
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Abstract

The performance of a dual-chamber Oscillating Water Column (OWC) Wave Energy Converter (WEC) is considered in the present study. The device has two sub-chambers with a shared orifice. A two-dimensional (2D) fully nonlinear numerical wave flume based on the potential-flow theory and the time-domain higher-order boundary element method (HOBEM) is applied for the simulation. The incident waves are generated by using the immerged sources and the air-fluid coupling influence is considered with a simplified pneumatic model. In the present study, the variation of the surface elevation and the water column volume in the two sub-chambers are investigated. The effects of the chamber geometry (i.e., the draft and breadth of two chambers) on the surface elevation and the air pressure in the chamber are investigated, respectively. It is demonstrated that the surface elevations in the two sub-chambers are strongly dependent on the wave conditions. The larger the wavelength, the more synchronous motion of the two water columns in the two sub-chambers, thus, the lager the variation of the water column volume. View Full-Text
Keywords: wave energy converter; OWC; dual-chamber; HOBEM; hydrodynamic performance; fully nonlinear wave energy converter; OWC; dual-chamber; HOBEM; hydrodynamic performance; fully nonlinear
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ning, D.; Wang, R.; Zhang, C. Numerical Simulation of a Dual-Chamber Oscillating Water Column Wave Energy Converter. Sustainability 2017, 9, 1599.

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