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Interaction lit fluidisé de particules solides-rayonnement solaire concentré pour la mise au point d'un procédé de chauffage de gaz à plus de 1000 K

Abstract : At the moment the traditional fossil energy (oil, coal ...) are beginning to run out, causing humanity to seek other sources of energy to meet his needs. Nature holds many sources of inexhaustible and clean energy like solar energy, biomass and wind energy. The availability of solar energy, its free and renewal encourage its collection and use. Solar energy can be collected for various uses as conducting an endothermic chemical reaction or production of electricity. The production of solar electricity is made by photovoltaic processes or by thermodynamic processes. Those have an interesting performance, but are currently limited by temperature steam cycles. one solution is to heat a gas at very high temperatures at the entrance of a gas turbine. The work presented in this report describes a process of collecting concentrated solar energy based on a change section fluidized bed. The collection of solar energy is directly through a transparent quartz window. The design of our solar receiver is based on two studies. The first enable us to cold test several transparent columns with different geometries and dimensions to optimize the distribution of particles during fluidization. This study enable us to choose the dimensions and geometry of the solar receiver. In parallel, we made a first receiver artificial illumination by infrared lamps. we have designed the receiver in RAPSODEE laboratory of the Ecole des Mines d'Albi. It helped us to verify the feasibility of the process and to have the first results of the hot fluidized bed. The solar receiver was then tested in 4.6 m solar concentrator of PROMES-CNRS Odeillo. During our work we studied experimentally and numerically heat transfer in the fluidized bed and the influence of various physical parameters for the effectiveness of the receiver. A mathematical model of radiative transfer based on the Monte Carlo Method in 1 D was achieved. The model is used to determine the distribution of heat in the different layers of the fluidized bed and the radiative losses. We conclude for the relevance of our choice in this work and the perspectives.
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Submitted on : Wednesday, August 12, 2009 - 10:12:55 AM
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  • HAL Id : tel-00409692, version 1

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Arezki Bounaceur. Interaction lit fluidisé de particules solides-rayonnement solaire concentré pour la mise au point d'un procédé de chauffage de gaz à plus de 1000 K. Energie électrique. École Nationale Supérieure des Mines de Paris, 2008. Français. ⟨NNT : 2008ENMP1609⟩. ⟨tel-00409692⟩

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