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An Experimental Study of Contact Coefficients in Paper Drying

Wilhelmsson, B; Fagerholm, L; Nilsson, L and Stenström, Stig LU (1994) In Tappi Journal 77(5). p.159-168
Abstract
The influence of different dryer fabrics on the contact coefficient has been studied experimentally under various conditions. A bench-scale drying apparatus, in which the fabric could be fixed at variable tensions, was used in the experiments. A technique for measuring the heat flux and surface temperatures of the paper sample and the hot surface was developed. Three paper grades were used in the investigation: newsprint, fine paper, and liner The key parameters affecting the heat transfer were found to be the moisture content of the sheet and the hot surface temperature. The applied fabric tension, the number of contact points and the contact area of the fabric did not have significant influence on the heat transfer in the 2-6 kN/m fabric... (More)
The influence of different dryer fabrics on the contact coefficient has been studied experimentally under various conditions. A bench-scale drying apparatus, in which the fabric could be fixed at variable tensions, was used in the experiments. A technique for measuring the heat flux and surface temperatures of the paper sample and the hot surface was developed. Three paper grades were used in the investigation: newsprint, fine paper, and liner The key parameters affecting the heat transfer were found to be the moisture content of the sheet and the hot surface temperature. The applied fabric tension, the number of contact points and the contact area of the fabric did not have significant influence on the heat transfer in the 2-6 kN/m fabric tension range investigated. An extensive review of the literature on contact coefficients was conducted. It showed a very large scattering of results, due mainly to different experimental conditions and techniques. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
COEFFICIENTS, CONTACTING, DRYING, FABRIC, HEAT TRANSFER, MOISTURE, CONTENT, REVIEW, TENSION
in
Tappi Journal
volume
77
issue
5
pages
159 - 168
publisher
TAPPI
external identifiers
  • wos:A1994NK93000022
  • scopus:0028442002
ISSN
0734-1415
language
English
LU publication?
yes
id
1d6fbb30-6cc7-4281-b602-c83817bb6fdb (old id 3914092)
date added to LUP
2013-07-01 11:12:07
date last changed
2017-02-19 04:07:50
@article{1d6fbb30-6cc7-4281-b602-c83817bb6fdb,
  abstract     = {The influence of different dryer fabrics on the contact coefficient has been studied experimentally under various conditions. A bench-scale drying apparatus, in which the fabric could be fixed at variable tensions, was used in the experiments. A technique for measuring the heat flux and surface temperatures of the paper sample and the hot surface was developed. Three paper grades were used in the investigation: newsprint, fine paper, and liner The key parameters affecting the heat transfer were found to be the moisture content of the sheet and the hot surface temperature. The applied fabric tension, the number of contact points and the contact area of the fabric did not have significant influence on the heat transfer in the 2-6 kN/m fabric tension range investigated. An extensive review of the literature on contact coefficients was conducted. It showed a very large scattering of results, due mainly to different experimental conditions and techniques.},
  author       = {Wilhelmsson, B and Fagerholm, L and Nilsson, L and Stenström, Stig},
  issn         = {0734-1415},
  keyword      = {COEFFICIENTS,CONTACTING,DRYING,FABRIC,HEAT TRANSFER,MOISTURE,CONTENT,REVIEW,TENSION},
  language     = {eng},
  number       = {5},
  pages        = {159--168},
  publisher    = {TAPPI},
  series       = {Tappi Journal},
  title        = {An Experimental Study of Contact Coefficients in Paper Drying},
  volume       = {77},
  year         = {1994},
}