A model for through-drying of tissue paper at constant pressure drop and high drying intensity
(2007) In Drying Technology 25(12). p.1949-1958- Abstract
- A mathematical model for through drying of paper at constant pressure drop was developed. The model is based on physical properties; hence, basis weight, pressure drop, drying air temperature, pore size distribution, initial gas fraction, and tortuosity are important input parameters to the model. The model was solved for different combinations of the variables basis weight, drying air temperature, and pressure drop corresponding to industrial conditions and the results were compared with data from bench-scale experiments. The simulations show that the drying rate curve is very sensitive to the air flow rate and that correctly modeling the correlation between pressure drop and air flow rate is the most important factor for a successful... (More)
- A mathematical model for through drying of paper at constant pressure drop was developed. The model is based on physical properties; hence, basis weight, pressure drop, drying air temperature, pore size distribution, initial gas fraction, and tortuosity are important input parameters to the model. The model was solved for different combinations of the variables basis weight, drying air temperature, and pressure drop corresponding to industrial conditions and the results were compared with data from bench-scale experiments. The simulations show that the drying rate curve is very sensitive to the air flow rate and that correctly modeling the correlation between pressure drop and air flow rate is the most important factor for a successful model for through drying. The model was tuned by adjusting the parameters initial gas fraction and tortuosity in order to give the best possible fit to experimental data. For a given basis weight and pressure drop, different drying air temperatures resulted in relatively constant values of the fitted parameters. This means that the model can well predict the effects of changes in drying air temperature based on a tuning of the model performed at the same basis weight and pressure drop. However, for a given basis weight, an increase in pressure drop yielded fitted parameters that were somewhat different; i.e., a lower initial gas fraction and a higher tortuosity, a change that increases the resistance to air flow. This implies that the correlation between pressure drop and air flow rate in the model does not quite capture the nonlinear relationship shown by the experiments. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/702160
- author
- Weineisen, Henrik LU and Stenström, Stig LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Modeling, TAD, Through air drying, Through drying, Tissue
- in
- Drying Technology
- volume
- 25
- issue
- 12
- pages
- 1949 - 1958
- publisher
- TAPPI
- external identifiers
-
- wos:000253875600006
- scopus:36849047364
- ISSN
- 1532-2300
- DOI
- 10.1080/07373930701727259
- language
- English
- LU publication?
- yes
- id
- e3846c5d-d0d1-4da7-944d-80835a1afc33 (old id 702160)
- date added to LUP
- 2016-04-01 12:06:00
- date last changed
- 2023-09-01 19:23:52
@article{e3846c5d-d0d1-4da7-944d-80835a1afc33,
abstract = {{A mathematical model for through drying of paper at constant pressure drop was developed. The model is based on physical properties; hence, basis weight, pressure drop, drying air temperature, pore size distribution, initial gas fraction, and tortuosity are important input parameters to the model. The model was solved for different combinations of the variables basis weight, drying air temperature, and pressure drop corresponding to industrial conditions and the results were compared with data from bench-scale experiments. The simulations show that the drying rate curve is very sensitive to the air flow rate and that correctly modeling the correlation between pressure drop and air flow rate is the most important factor for a successful model for through drying. The model was tuned by adjusting the parameters initial gas fraction and tortuosity in order to give the best possible fit to experimental data. For a given basis weight and pressure drop, different drying air temperatures resulted in relatively constant values of the fitted parameters. This means that the model can well predict the effects of changes in drying air temperature based on a tuning of the model performed at the same basis weight and pressure drop. However, for a given basis weight, an increase in pressure drop yielded fitted parameters that were somewhat different; i.e., a lower initial gas fraction and a higher tortuosity, a change that increases the resistance to air flow. This implies that the correlation between pressure drop and air flow rate in the model does not quite capture the nonlinear relationship shown by the experiments.}},
author = {{Weineisen, Henrik and Stenström, Stig}},
issn = {{1532-2300}},
keywords = {{Modeling; TAD; Through air drying; Through drying; Tissue}},
language = {{eng}},
number = {{12}},
pages = {{1949--1958}},
publisher = {{TAPPI}},
series = {{Drying Technology}},
title = {{A model for through-drying of tissue paper at constant pressure drop and high drying intensity}},
url = {{http://dx.doi.org/10.1080/07373930701727259}},
doi = {{10.1080/07373930701727259}},
volume = {{25}},
year = {{2007}},
}