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Power estimates of an undulating membrane tidal energy converter ArchiMer
Trasch, Martin; Deporte, Astrid; Delacroix, Sylvain; Drevet, Jean-baptiste; Gaurier, Benoit; Germain, Gregory.
An experimental study of an undulating membrane based on the Eel Energy device is presented in this paper. This system uses interaction between a semi-rigid plate and an axial flow to generate undulation. At full scale, the deformation of the structure is then converted into electrical power using linear electromagnetic generators. In order to simulate the power take-off on a 1/20th scale prototype, hydraulic dampers are located all over the length of the device. The dampers have non-linear behaviour. A representative damping parameter have been introduced to study their impact. Results are presented in function of fluid velocity and damping adjustment. Undulation mode, frequency and forces on the structure are described. Results show that fluid velocity...
Tipo: Text Palavras-chave: Marine renewable energy; Tidal energy converter; Power take-off; Fluid-structure interaction; Flume tank.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00411/52205/53359.pdf
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Etude d’une hydrolienne à membrane ondulante à convertisseurs linéaires ArchiMer
Deporte, Astrid; Germain, Gregory; Trasch, M.; Davies, Peter; Drevet, J. B..
Tidal energy converters are mostly marine turbines. They have many disavantages in sea where the environment is very inhospitable. We study a new system based on undulating membrane. Pressure deforms the device periodically, we observe a wave propagating along the length. Electromagnetic converters are distributed over the length of the membrane and act like dampers. In this paper, we present numerical and experimental developments carried out to study the system’s behavior.
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00246/35765/34278.pdf
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Analytical linear modelization of a buckled undulating membrane tidal energy converter ArchiMer
Trasch, Martin; Deporte, Astrid; Delacroix, Sylvain; Germain, Gregory; Drevet, Jean-baptiste.
This paper presents an analytical linear model developed to study the behaviour of a buckled membrane tidal energy converter. The Euler beam theory and the elongated body theory are used for the fluid structure interaction formulation. The effect of electromechanical converters used to convert the undulating motion into electrical energy is reproduced by adding a term equivalent to viscous material damping. The influence of compression force, flaps and hanging conditions is studied, as well as the effects of simulated power take-off through internal damping. The system's behaviour is characterized by undulating mode, critical flow velocity, motion frequency and amplitude. The model shows good agreement in terms of frequency and satisfactory results for the...
Tipo: Text Palavras-chave: Marine renewable energy; Tidal energy converter; Power take-off; Fluid-structure interaction; Slender body theory.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00445/55631/57277.pdf
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Caractérisation du fonctionnement d'une hydrolienne à membrane ondulante pour la récupération de l'énergie des courants marins ArchiMer
Deporte, Astrid.
This manuscript presents three approaches : analytical, experimental and numerical, to study the behaviour of a flexible membrane tidal energy converter. This technology, developed by the EEL Energy company, is based on periodic deformations of a pre-stressed flexible structure. Energy converters, located on each side of the device, are set into motion by the wave-like motion. In the analytical model, the membrane is represented by a linear beam model at one dimension and the flow by a 3 dimensions potential fluid. The fluid forces are evaluated by the elongated body theory. Energy is dissipated all over the length of the membrane. A 20th scale experimental prototype has been designed with micro-dampers to simulate the power take-off. Trials have allowed...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00349/46002/46033.pdf
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Étude d’une membrane ondulante pour la récupération de l’énergie des courants marins ArchiMer
Deporte, Astrid; Germain, Gregory; Drevet, Jean-baptiste; Davies, Peter.
This project deals with the study of the mechanical behavior of a wavering membrane used to collect marine current energy. We give first a description of means and method used to characterize our system. Then the results of the experiments on a one to sixth prototype are presented. In parallel, a numerical study is performed. This modelling and experiments permit to confirm the efficiency of the wavering membrane.
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00141/25199/23308.pdf
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