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Assessment of different paper drying processes to reduce the total energy costs from a mill perspective

Lindell, Kristian LU and Stenström, Stig LU (2004) In Proceedings of the 14th International Drying Symposium (IDS 2004) B. p.1233-1240
Abstract
Since the energy required in the paper drying process gives rise to substantial costs for

the paper producing companies, it is of great interest to reduce the input of primary

energy resources to the dryer. Either process changes or further heat recovery can be

employed. A simulation tool was developed, using the programming tool Extend, with

the aim to accurately describe the energy use and costs in different paper drying

processes to make possible the evaluation of different process changes from an energy

point of view. The tool was used to evaluate the total use of and costs for energy in a

fictive conventional paper dryer at various dew points in the PM-hood air. Also... (More)
Since the energy required in the paper drying process gives rise to substantial costs for

the paper producing companies, it is of great interest to reduce the input of primary

energy resources to the dryer. Either process changes or further heat recovery can be

employed. A simulation tool was developed, using the programming tool Extend, with

the aim to accurately describe the energy use and costs in different paper drying

processes to make possible the evaluation of different process changes from an energy

point of view. The tool was used to evaluate the total use of and costs for energy in a

fictive conventional paper dryer at various dew points in the PM-hood air. Also the

potentials for heat recovery were assessed. From the simulation results, the overall

economics of the drying process at the various conditions were calculated. The overall

energy efficiency was shown to increase with increasing dew points since the required

energy for air heating was reduced and the potential for heat recovery was improved.

The prices of energy resources were shown to have a large effect on the total economics

of the drying process. For a dryer limited paper machine, the increased production at

lower dew points was shown to increase the profitability of the paper machine. (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
B
pages
1233 - 1240
ISBN
85-904573-1-1
language
English
LU publication?
yes
id
a0558541-3aa5-4eaf-a264-07e864ac6a78 (old id 530064)
alternative location
http://www.feq.unicamp.br/~ids2004/volB/pp%201233-1240.pdf
date added to LUP
2007-09-21 12:05:18
date last changed
2016-04-16 11:32:13
@inproceedings{a0558541-3aa5-4eaf-a264-07e864ac6a78,
  abstract     = {Since the energy required in the paper drying process gives rise to substantial costs for<br/><br>
the paper producing companies, it is of great interest to reduce the input of primary<br/><br>
energy resources to the dryer. Either process changes or further heat recovery can be<br/><br>
employed. A simulation tool was developed, using the programming tool Extend, with<br/><br>
the aim to accurately describe the energy use and costs in different paper drying<br/><br>
processes to make possible the evaluation of different process changes from an energy<br/><br>
point of view. The tool was used to evaluate the total use of and costs for energy in a<br/><br>
fictive conventional paper dryer at various dew points in the PM-hood air. Also the<br/><br>
potentials for heat recovery were assessed. From the simulation results, the overall<br/><br>
economics of the drying process at the various conditions were calculated. The overall<br/><br>
energy efficiency was shown to increase with increasing dew points since the required<br/><br>
energy for air heating was reduced and the potential for heat recovery was improved.<br/><br>
The prices of energy resources were shown to have a large effect on the total economics<br/><br>
of the drying process. For a dryer limited paper machine, the increased production at<br/><br>
lower dew points was shown to increase the profitability of the paper machine.},
  author       = {Lindell, Kristian and Stenström, Stig},
  booktitle    = {Proceedings of the 14th International Drying Symposium (IDS 2004)},
  isbn         = {85-904573-1-1},
  language     = {eng},
  pages        = {1233--1240},
  title        = {Assessment of different paper drying processes to reduce the total energy costs from a mill perspective},
  volume       = {B},
  year         = {2004},
}