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Comparison of two modeling approaches for a multi-cylinder paper dryer

Karlsson, Magnus LU and Stenström, Stig LU (2004) In Proceedings of the 14th International Drying Symposium (IDS 2004) A. p.422-429
Abstract
Two modeling approaches for a multi-cylinder cardboard dryer were compared with

respect to fitting parameters and model structure. Model 1 includes internal mass

transfer while model 2 does not. One important fitting parameter for all models is the

contact heat transfer coefficient between the cylinder and the paper. Two different

correlations, a constant value and a moisture dependant (linear) heat transfer coefficient

were applied on both models. Prediction of the average moisture ratio was found to be

equally good for the two models while they differed in predictability for other and more

detailed information. Model 1 revealed the critical sections in the paper dryer... (More)
Two modeling approaches for a multi-cylinder cardboard dryer were compared with

respect to fitting parameters and model structure. Model 1 includes internal mass

transfer while model 2 does not. One important fitting parameter for all models is the

contact heat transfer coefficient between the cylinder and the paper. Two different

correlations, a constant value and a moisture dependant (linear) heat transfer coefficient

were applied on both models. Prediction of the average moisture ratio was found to be

equally good for the two models while they differed in predictability for other and more

detailed information. Model 1 revealed the critical sections in the paper dryer where

high moisture content (providing low strength) and high gas pressures occur in the

paper web. The linear correlation of the contact heat transfer coefficient showed no

advantages in model 1 while it was found to be more appropriate for model 2. The heat

flux is reduced at low moisture ratios in both models but for model 1 the reduction is

due to internal mass transfer resistance rather than reduced contact between the cylinder

and the paper. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Proceedings of the 14th International Drying Symposium (IDS 2004)
volume
A
pages
422 - 429
ISBN
85-904573-1-1
language
English
LU publication?
yes
id
0eae9296-a35e-4510-9947-5a50305732ad (old id 530060)
alternative location
http://www.feq.unicamp.br/~ids2004/volA/pp%20422-429.pdf
date added to LUP
2007-09-21 10:54:17
date last changed
2016-04-16 11:44:36
@misc{0eae9296-a35e-4510-9947-5a50305732ad,
  abstract     = {Two modeling approaches for a multi-cylinder cardboard dryer were compared with<br/><br>
respect to fitting parameters and model structure. Model 1 includes internal mass<br/><br>
transfer while model 2 does not. One important fitting parameter for all models is the<br/><br>
contact heat transfer coefficient between the cylinder and the paper. Two different<br/><br>
correlations, a constant value and a moisture dependant (linear) heat transfer coefficient<br/><br>
were applied on both models. Prediction of the average moisture ratio was found to be<br/><br>
equally good for the two models while they differed in predictability for other and more<br/><br>
detailed information. Model 1 revealed the critical sections in the paper dryer where<br/><br>
high moisture content (providing low strength) and high gas pressures occur in the<br/><br>
paper web. The linear correlation of the contact heat transfer coefficient showed no<br/><br>
advantages in model 1 while it was found to be more appropriate for model 2. The heat<br/><br>
flux is reduced at low moisture ratios in both models but for model 1 the reduction is<br/><br>
due to internal mass transfer resistance rather than reduced contact between the cylinder<br/><br>
and the paper.},
  author       = {Karlsson, Magnus and Stenström, Stig},
  isbn         = {85-904573-1-1},
  language     = {eng},
  pages        = {422--429},
  series       = {Proceedings of the 14th International Drying Symposium (IDS 2004)},
  title        = {Comparison of two modeling approaches for a multi-cylinder paper dryer},
  volume       = {A},
  year         = {2004},
}