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A dual-scale model for describing drier and porous medium interactions

Perre, Patrick & Turner, Ian W. (2006) A dual-scale model for describing drier and porous medium interactions. AIChE Journal, 52(9), pp. 3109-3117.

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Abstract

A dual-scale modeling approach is proposed to describe the coupling of the drier (large-scale) and the porous medium (macroscale) throughout drying. This model is used to investigate the vacuum drying of a softwood board placed in an experimental vacuum chamber that is heated by two infrared (IR) emitters. The large-scale model provides important information for the drying engineer to assess and tune the performance of the drier. This model allows simulation of the chamber wall and IR emitter temperature evolution, together with changes in the chamber vapor, air, and water mass balances. The comprehensive two-dimensional drying model known as TransPore is used to determine the heat and mass transfer occurring at the macroscale of the board. Finally, four case studies are presented to elucidate the intricate coupling that exists between the chamber technical specifications and the drying behavior of the porous medium. A highlight of the dual-scale model is its ability to predict the condensation on the walls of a poorly insulated vacuum chamber for the case of a weak pump.

Impact and interest:

11 citations in Scopus
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7 citations in Web of Science®

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ID Code: 8187
Item Type: Journal Article
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author. Author contact details: i.turner@qut.edu.au
Keywords: two, dimensional heat and mass transfer, vacuum chamber model, experimental data, kiln, load coupling
DOI: 10.1002/aic.10918
ISSN: 0001-1541
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Timber Pulp and Paper (091210)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Heat and Mass Transfer Operations (091505)
Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > NUMERICAL AND COMPUTATIONAL MATHEMATICS (010300) > Numerical Analysis (010301)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2006 John Wiley & Sons
Deposited On: 22 Jun 2007
Last Modified: 29 Feb 2012 23:22

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