التفاصيل البيبلوغرافية
| العنوان: |
Development of CFD models applied to fluidized beds for waste gasification ; Développement de modèles CFD appliqués à des lits fluidisés pour la gazéification des déchets |
| المؤلفون: |
Tricomi, Leonardo |
| المساهمون: |
Lavoie, Jean-Michel, Chiaramonti, David |
| بيانات النشر: |
Université de Sherbrooke |
| سنة النشر: |
2017 |
| المجموعة: |
Université de Sherbrooke: Savoirs UdeS |
| مصطلحات موضوعية: |
CFD models, TFM, DPM, Power Spectral Density (PSD), Kinetic Theory of Granular Flow (KTGF), Bubbling fluidized bed, Pressure drop, Lit fluidisé bouillonnant, Fluctuations de pression, Modèles CFD–TFM/DPM, Densité spectrale de puissance (PSD), Théorie cinétique du flux granulaire (KTGF) |
| الوصف: |
The thesis work is part of a project that aims to develop a reliable CFD model to investigate the fluid-dynamics of a fluidized bubbling bed during gasification of refuse derived fuel (RDF) from sorted municipal solid waste (MSW). Gasification is a thermochemical process that converts carbon-containing materials into syngas. In this specific context scaling up is challenging because it implies dealing with a complex chemistry combined to heat and mass transfer phenomena in a multi-phase fluid environment. CFD modeling could represent a potential tool to predict the impact of the reactor configuration and operating conditions on gas yield, composition and potential contaminants. Validation of CFD simulations for such systems has been so far possible using different sophisticated experimental tools, allowing to link the model with experimental data. However, such high tech equipment may not always be available, especially at industrial scale. Hence, this work focuses on investigating the accuracy and numerical sensitivity of two different CFD models employed in the characterization of dense solid-particle flows in bubbling fluidized beds. The key parameter adopted to describe and quantify the dynamic behavior of this multiphase system is the power spectral density (PSD) distribution of pressure fluctuations. This PSD function was used to assess the accuracy of CFD models using one set of operating condition. The same type of analysis, extended to a wider range of operating conditions, may lead to a robust validation of the numerical models presented in this work. In spite of his measurement simplicity, pressure drop data present a strong connection with the bed fluid-dynamics and its interpretation could help to improve the fluidized bed technologies very fast, pushing CFD models closer to applications. ; Résumé : Le but de ce projet est de développer un modèle CFD fiable pour étudier la dynamique des fluides d'un lit fluidisé en régime bullant pendant la gazéification de combustibles solides de ... |
| نوع الوثيقة: |
doctoral or postdoctoral thesis |
| اللغة: |
English |
| Relation: |
http://hdl.handle.net/11143/11333 |
| الاتاحة: |
http://hdl.handle.net/11143/11333 |
| Rights: |
© Leonardo Tricomi |
| رقم الانضمام: |
edsbas.F0F53FB5 |
| قاعدة البيانات: |
BASE |