Fluidic Components for Oscillating Water Column Based Wave Energy Plants
01 Jan 2011-Vol. 1, pp 1979-1983
TL;DR: In this paper, a combination of a fluidic diode and the unidirectional turbine can achieve a very high impedance to reverse flow while having a high efficiency in the forward direction, over a wide range of flow coefficients.
Abstract: A bidirectional (oscillating) air flow is central to energy conversion from wave to wire in an oscillating water column based wave energy plant. Several classes of bidirectional turbines, which operate with such an oscillating flow, have been designed and tested with limited efficiencies. A topology which uses fluidic diodes in conjunction with unidirectional turbines is shown to significantly improve the efficiency. The design and test results from several fluidic diodes for such an application are discussed. It is shown that a combination of a fluidic diode and the unidirectional turbine can achieve a very high impedance to reverse flow while having a high efficiency in the forward direction, over a wide range of flow coefficients.Copyright © 2011 by JSME
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TL;DR: In this article, a twin unidirectional impulse turbine has been proposed in order to enhance the performance of wave energy plant, however, the turbine characteristics have not been clarified to date.
Abstract: A twin unidirectional impulse turbine has been proposed in order to enhance the performance of wave energy plant. This turbine system uses two unidirectional impulse turbines and their flow direction is different from each other. However, the turbine characteristics have not been clarified to date. The performances of a unidirectional impulse turbine under steady flow conditions were investigated experimentally by using a wind tunnel with large piston/cylinder in this study. Then, efficiency of the twin impulse turbine have been estimated by a quasi-steady analysis using experimental results.
34 citations
TL;DR: In this paper, a CFD model has been used to analyze the flow field of the turbine when working in both operation modes: direct and reverse, and the efficiency of the twin turbine configuration has been calculated from the results of the numerical model.
33 citations
TL;DR: In this article, the aerodynamic performance of two unidirectional-radial-air-turbine configurations; inflow and outflow, was analyzed in terms of full-scale power extraction using extrapolated hydrodynamic experimental data of irregular waves.
18 citations
TL;DR: In this paper, a unidirectional radial air-inflow-turbine design using Computational-Fluid-Dynamics (CFD) suitable for application with a vented-OWC is presented.
15 citations
TL;DR: In this paper, the use of a radial turbine to improve the system's efficiency by enhancing flow rectification is presented for the first time, and an experimentally validated numerical model has been used to analyse the flow field of the radial turbine when working in both direct and reverse modes.
13 citations