Evaluation of Comsol Multiphysics for modelling of fluidized bed combustion

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/220197
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Type: Examensarbete för masterexamen
Master Thesis
Title: Evaluation of Comsol Multiphysics for modelling of fluidized bed combustion
Authors: Cima, Elisabeth
Abstract: Fluidized bed (FB) combustion offers an efficient and flexible way of producing heat and power from a large range of solid fuels. The installed capacity of FB boilers has increased steadily over the last years and there are today units as large as 460MWe. The continued development and scale up of FB boilers require research, where an important tool that could assist the development is modelling of the combustion processes. Due to the complex fluid dynamics and fuel conversion phenomena in FB boilers, comprehensive modelling of these units require simplified ways to describe the combustion process. In the present work, a model describing the mass and heat transfer in a bubbling fluidized bed (BFB) has been implemented in Comsol Multiphysics, version 5.1. The aim of the work is to investigate the possibilities and challenges of using Comsol for modelling of FB boilers. Reasonable results are obtained for the mass balance whereas further work is required for the coupled mass and heat balance. It is concluded that Comsol offers a flexible environment for this type of modelling. However, the flexibility is also challenging, and more complex models require a solid knowledge about the software.
Keywords: Energi;Hållbar utveckling;Energiteknik;Energy;Sustainable Development;Energy Engineering
Issue Date: 2015
Publisher: Chalmers tekniska högskola / Institutionen för energi och miljö
Chalmers University of Technology / Department of Energy and Environment
URI: https://hdl.handle.net/20.500.12380/220197
Collection:Examensarbeten för masterexamen // Master Theses

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