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|Title: ||A combined constant rate and diffusion model to simulate kiln-drying of Pinus radiata timber|
|Author: ||Youngman, M. J.|
Woodhead, Ian M.
Buchan, Graeme D.
|Date: ||Mar-1999 |
|Publisher: ||Lincoln University. Applied Computing, Mathematics and Statistics Group.|
|Series/Report no.: ||Research report (Lincoln University (Canterbury, N.Z.). Applied Computing, Mathematics and Statistics Group) ; no. 99/04|
|Item Type: ||Monograph|
|Abstract: ||This paper presents the use of a combined constant drying-rate and diffusion
model to simulate the drying of Pinus Radiata timber under kiln-drying
conditions. The constant drying-rate and diffusion coefficients of the model,
which control the drying rate of individual pieces of timber, were determined
from calibrating the model against the experimental drying curves obtained
under the kiln-drying conditions. The experimental drying curves were
obtained from the gravimetric measurements of the moisture content of timber
during kiln drying. Statistical relationships were developed for the constant
drying-rate and the diffusion coefficients of the model as functions of kiln
temperature and the dry basis density of timber. To determine the effects of
variability of timber, a simulation scheme was developed based on the model, the
probability distribution of the density of timber, the equations for the constant
drying-rate coefficient and the diffusion coefficient. The model and the associated
simulation method provides a simple way to estimate the drying time of a stack
of timber provided that accurate experimental results for the specific timber kiln are used for the parameter estimation.|
|Persistent URL (URI): ||http://hdl.handle.net/10182/935|
|Appears in Collections:||Applied Computing Research Report series|
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