MODELING VACUUM-CONTACT DRYING OF WOOD: THE WATER POTENTIAL APPROACH
作者:
Maurice Defo,
Alain Cloutier,
Yves Fortin,
期刊:
Drying Technology
(Taylor Available online 2000)
卷期:
Volume 18,
issue 8
页码: 1737-1778
ISSN:0737-3937
年代: 2000
DOI:10.1080/07373930008917809
出版商: Taylor & Francis Group
关键词: effective water conductivity;finite element method;moisture content;pressure;sugar maple;temperature
数据来源: Taylor
摘要:
A two-dimensional mathematical model for vacuum-contact drying of wood is presented. The moisture and heat equations are based on the water potential concept whereas the pressure equation is formulated considering unsteady state conservation equation of dry air. Most of the model parameters were determined during independent experiments. The set of equations is then solved in a coupled form using the finite element method. The validation of the model is performed using experimental results obtained during vacuum-contact drying of sugar maple sapwood. The experimental and calculated data are in good agreement. Nevertheless, some discrepancies are observed which can be attributed to the boundary conditions used and to the fact that heat transfer by convection was neglected.
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