Sökning: "bubbling beds"
Visar resultat 6 - 10 av 20 avhandlingar innehållade orden bubbling beds.
6. Numerical simulation of fluid dynamics and cooling-tube erosion in bubbling fluidized beds
Sammanfattning : .... LÄS MER
7. Modelling and Simulation of Turbulent Gas-Solid Flows applied to Fluidization
Sammanfattning : Modelling of gas-solid suspensions has been studied with emphasis on suitable closure laws. A study of characteristic time scales and energy dissipation mechanisms is made for the case of a simple shear flow. Applications of the modelling are presented in the form of simulation and validation of experiments in fluidized beds. LÄS MER
8. Packed-Fluidized Bed Reactors – Batch Experiments and Fundamental Modeling with Random Metal Packings
Sammanfattning : The aim of this work is to investigate the effect of random packings on heat and mass transfer phenomena, when applied in bubbling fluidized beds. For this purpose, first, the heat transfer coefficient to a horizontal tube submerged in a fluidized bed containing various types of random packings was investigated. LÄS MER
9. Fluidized-Bed Reactor Systems for Chemical-Looping Combustion with Inherent Separation of CO2
Sammanfattning : In chemical-looping combustion (CLC) a gaseous fuel can be burnt with inherent separation of carbon dioxide. The system consists of two reactors, a fuel reactor and an air reactor and an oxygen-carrier in the form of metal oxide particles that transports oxygen from the air to the fuel. LÄS MER
10. Fluid Dynamics and Erosion in a Fluidized Bed for Energy Production. A Numerical and Experimental Study
Sammanfattning : This thesis presents an experimental and a numerical investigation of fluid dynamics and erosion of heat transfer tubes in fluidized beds for energy conversion. The objective is to obtain recommendations for suitable models that can be used to predict the fluid dynamics and material wastage of heat exchanger tubes in fluidized beds. LÄS MER