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Amélioration des performances énergétiques et environnementales des systèmes frigorifiques au moyen de la brumisation des condenseurs à air

Abstract : The application of water mist in the air upstream of the air-cooled condensers can reduce the energy consumption of refrigeration. The advantage of water mist is the lowering of air temperature obtained by evaporation of the spray. The optimization of this method provides an efficiency approaching that of evaporative systems while eliminating the risk of development and transport of bacteria such as legionella. The problem is addressed here in two ways: the first theoretical and numerical (using the code MIRABELLES and development of a model heat exchange air-droplet/condenser) and the second experiment (establishment of a pilot and a heat pump). Using the code MIRABELLES, it was determined the characteristics of a spray operating in a given environment and its impact on the lowering of air temperature. The digital data obtained have guided the choice of materials and the experimental using condition of water mist. Measurements on the pilot show the improvement of heat exchange between air and the condenser by means of the mist and quantify the influence of the impact drops/condenser fins. The application of the mist on the heat pump has highlighted the gains in power consumption and the increase in refrigeration. The comparison of all experimental results with the numerical results has validated the thermal model simulating the interaction between a droplet-laden air and water condenser.
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  • HAL Id : tel-01746240, version 1

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Julien Tissot. Amélioration des performances énergétiques et environnementales des systèmes frigorifiques au moyen de la brumisation des condenseurs à air. Autre [cond-mat.other]. Université Henri Poincaré - Nancy 1, 2011. Français. ⟨NNT : 2011NAN10099⟩. ⟨tel-01746240⟩

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