Etude thermodynamique de l'encrassement des échangeurs de chaleur : application à la géométrie plane : simulation expérimentale par dépôt de glace

Abstract : This report is a study of plate heat exchangers fouling. This problem is dealt with a new point of view, the entropic criterion, which allows to take into account both the mechanical and therrmal energy losses. Different models are developped: mono-dimensionnal model for the half-exchanger and the whole exchanger. A global model for the whole exchanger (exchanger taken as a "black box") is also applied. These models are used with different kinds of parameters (temperatures, regimes and kinds. of flow) and adimensionnements (compared with the initial power or compared with non fouling initial state) for the basic geometry of a plate exchanger. Moreover the study of industrial cases for corrugated plates heat exchangers is done for the global model. The experimental aspect of this work is an ice deposit simulation. The different devices used for this part are detailed. The analysis of the first results allowed to understand the influence of parameters like temperatures and flows, in the ice formation growth. These results agreed with the models described above, for the range of the experiments done.
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Guy Hoyon. Etude thermodynamique de l'encrassement des échangeurs de chaleur : application à la géométrie plane : simulation expérimentale par dépôt de glace. Autre. Université Henri Poincaré - Nancy 1, 1997. Français. ⟨NNT : 1997NAN10292⟩. ⟨tel-01747115⟩

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