Modeling of flow conditions in down draft gasifiers using tin film models

Torben Kvist Jensen, Benny Gøbel, Ulrik Birk Henriksen

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Abstract

In order to examine how an inhomogeneous char bed affects the gas flow through the bed, a dynamic model have been developed to describe the flow distribution in a down draft gasifier. The gas flow distribution through the bed was determined using a thin film model approach. The temperatures in the bed were determined from a thermodynamic model of the gasification process. Model calculations showed that a relatively small fraction of the gas was flowing through a part of the bed that was fuelled with smaller particles compared to a part of the bed that was fuelled with larger particles. The calculations also show that if the height of the two different parts of the bed were not evened out the bed would not be stable. However, if transport of particles from one part of the bed to the other occurred the bed would be stable.
Original languageEnglish
Title of host publicationProceedings of The 16. International Conference of Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems, ECOS 2003
Place of PublicationDenmark
PublisherTechnical University of Denmark
Publication date2003
Pages1089-1095
Publication statusPublished - 2003
Event16th International Conference on Efficiency, Costs, Optimization, Simulation and Environmental Impact of Energy Systems - Copenhagen, Denmark
Duration: 30 Jun 20032 Jul 2003
Conference number: 16
http://www.ecos2003.dtu.dk/

Conference

Conference16th International Conference on Efficiency, Costs, Optimization, Simulation and Environmental Impact of Energy Systems
Number16
CountryDenmark
CityCopenhagen
Period30/06/200302/07/2003
Internet address

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