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Développement de méthodes d’analyse avancées de données expérimentales sur les phénomènes d’encrassement d’échangeurs thermiques en conditions réelles de fonctionnement

Abstract : The lack of dedicated tool, enabling at industrials to act effectively on the fouling phenomena in heat exchanger is the origin of this study. The purpose of the thesis is to develop a methodology in order to assess - in situ - at the characteristic parameters of the fouling effects, implement and then validate the data analysis methods to extract a fouling effects prediction tools from the knowledge of a limited number of operating data. We focus on the fouling phenomena of heat exchangers in real environment, on charged water, by insisting on the development of the methodologies of identification of fouling kinetics and on the validation procedures for concrete cases. The approach was carried out on a test bench whose operating conditions imply situations close to real operating conditions, in particular the presence of typical impromptu events which modify the fouling kinetics. The methodological process of data analysis put in place, and which allowed establishing a prediction model of fouling using artificial neural network modelization, was then applied and validated on an industrial installation. The purpose of the approach allows, for any installation and from a small number of sensors, to develop a tool for evaluating and predicting the kinetics of fouling of thermal equipment in order to develop a maintenance practice from the perspective of reducing energy costs and costs of intervention.
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Christophe Weber. Développement de méthodes d’analyse avancées de données expérimentales sur les phénomènes d’encrassement d’échangeurs thermiques en conditions réelles de fonctionnement. Thermique [physics.class-ph]. Université de Nantes, 2018. Français. ⟨tel-02521003⟩

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