Topic
Oscillating Water Column
About: Oscillating Water Column is a research topic. Over the lifetime, 1379 publications have been published within this topic receiving 18958 citations.
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TL;DR: In this paper, a 2D numerical model based on the RANS equations and the VOF surface capturing scheme (RANS-VOF) is implemented in order to study the optimum turbine-chamber coupling for a given oscillating water column (OWC) wave energy converter.
192 citations
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TL;DR: In this paper, the hydrodynamic performance of a fixed Oscillating Water Column (OWC) wave energy device under various wave conditions and geometric parameters was tested experimentally in a wave flume.
187 citations
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TL;DR: In this paper, an oscillating water column (OWC) is studied experimentally to examine energy efficiencies for power take-off in a wave environment with plane progressive waves of steepness ranging from kA = 0.01 to 0.22 and water depth ratios varying from kh=0.30 to 3.72.
Abstract: An oscillating water column device enables the conversion of wave energy into electrical energy via wave interaction with a semi-submerged chamber coupled with a turbine for power take off. This present work concentrates on the wave interaction with the semi-submerged chamber, whereby a shore based oscillating water column (OWC) is studied experimentally to examine energy efficiencies for power take-off. The wave environment considered comprises plane progressive waves of steepnesses ranging from kA=0.01 to 0.22 and water depth ratios varying from kh=0.30 to 3.72, where k, A, and h denote the wave number, wave amplitude, and water depth, respectively. The key feature of this experimental campaign is a focus on the influence of front wall geometry on the OWC’s performance. More specifically, this focus includes: front wall draught, thickness, and aperture shape of the submerged front wall. We make use of a two-dimensional inviscid theory for an OWC for comparative purposes and to explain trends noted in the experimental measurements. The work undertaken here has revealed a broad banded efficiency centered about the natural frequency of the OWC. The magnitude and shape of the efficiency curves are influenced by the geometry of the front wall. Typical peak magnitude resonant efficiencies are in the order of 70%.
176 citations
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TL;DR: In this paper, a stochastic model was applied to devise an optimal algorithm for the rotational speed control of an oscillating-water-column (OWC) wave power plant equipped with a Wells turbine and to evaluate the average power output of the plant.
160 citations
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TL;DR: In this paper, a numerical method based on a two-phase level set with the global mass correction and immersed boundary method is developed to simulate wave interaction with a semi-submerged chamber.
158 citations