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Heat and mass transfer of drying particles in a fluidised bed

Heat and mass transfer of drying particles in a fluidised bed
Heat and mass transfer of drying particles in a fluidised bed
In this study, the heat transfer and drying process of arabica coffee beans in a batch fluidized bed roaster has been studied. Herein, the discrete element method (DEM) has been used and modified to account for resolved 1D temperature and moisture content profiles within each single coffee bean. This approach has the strength to provide much more information on the global (fluidization, mixing) and local (particle data) level compared to existing coffee roaster models. Therefore, the product quality can be evaluated on-line by many more specific criteria beyond the averaged global particle temperature and moisture content. Instead, information of every single particle is available which includes heat and mass transfer coefficients, its local position inside the bed, collision forces, etc. Furthermore, the overall roaster performance is based on e.g. fluidization stability, mixing efficiency or uniformity of quality properties among all particles. More data are presented to account for a broader coffee bean roasting evaluation. Modeling results are in good agreement with experimental data.
289-295
American Society Of Mechanical Engineers (ASME)
Brunchmuller, J.
85a4c922-5ce6-4d96-a8c6-9cc07a81793f
Gu, S.
a6f7af91-4731-46fe-ac4d-3081890ab704
Van Wachem, B.G.M.
bfe5ca52-5cc0-4e5c-add8-3b25567e9beb
Luo, K.H.
1c9be6c6-e956-4b12-af13-32ea855c69f3
Brunchmuller, J.
85a4c922-5ce6-4d96-a8c6-9cc07a81793f
Gu, S.
a6f7af91-4731-46fe-ac4d-3081890ab704
Van Wachem, B.G.M.
bfe5ca52-5cc0-4e5c-add8-3b25567e9beb
Luo, K.H.
1c9be6c6-e956-4b12-af13-32ea855c69f3

Brunchmuller, J., Gu, S., Van Wachem, B.G.M. and Luo, K.H. (2010) Heat and mass transfer of drying particles in a fluidised bed. In 2010 14th International Heat Transfer Conference. vol. 4, American Society Of Mechanical Engineers (ASME). pp. 289-295 . (doi:10.1115/IHTC14-22292).

Record type: Conference or Workshop Item (Paper)

Abstract

In this study, the heat transfer and drying process of arabica coffee beans in a batch fluidized bed roaster has been studied. Herein, the discrete element method (DEM) has been used and modified to account for resolved 1D temperature and moisture content profiles within each single coffee bean. This approach has the strength to provide much more information on the global (fluidization, mixing) and local (particle data) level compared to existing coffee roaster models. Therefore, the product quality can be evaluated on-line by many more specific criteria beyond the averaged global particle temperature and moisture content. Instead, information of every single particle is available which includes heat and mass transfer coefficients, its local position inside the bed, collision forces, etc. Furthermore, the overall roaster performance is based on e.g. fluidization stability, mixing efficiency or uniformity of quality properties among all particles. More data are presented to account for a broader coffee bean roasting evaluation. Modeling results are in good agreement with experimental data.

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More information

Published date: 8 August 2010
Venue - Dates: 14th ASME International Heat Transfer Conference, 2010-08-08

Identifiers

Local EPrints ID: 171487
URI: https://eprints.soton.ac.uk/id/eprint/171487
PURE UUID: 01700554-ede1-40ee-9720-47ee09ed73bb

Catalogue record

Date deposited: 17 Jan 2011 14:30
Last modified: 19 Dec 2018 17:30

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