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Absorption of infrared radiation and the radiation transfer mechanism in paper. Part II: Application to infrared dryers.

Pettersson, M and Stenström, Stig LU (1998) In Journal of Pulp and Paper Science 24(11). p.356-363
Abstract
A comparison of the absorption in paper of radiation from different IR sources has been made based on a theoretical model. As a first approach, blackbody spectra at 1300 K and 2500 K were compared. The radiation from the body at 1300 K is more readily absorbed by the paper There is, however only a small difference in the in-depth absorption when the intensities are adjusted to give the same amount of absorbed energy. Measurements of the spectral distribution from a gas-fired heater were used for a more careful comparison between gas-fired and electrical IR dryers. For electrical dryers, no such measurements have been found in the literature and therefore a mathematical model was developed. The absorption of radiation in the thickness... (More)
A comparison of the absorption in paper of radiation from different IR sources has been made based on a theoretical model. As a first approach, blackbody spectra at 1300 K and 2500 K were compared. The radiation from the body at 1300 K is more readily absorbed by the paper There is, however only a small difference in the in-depth absorption when the intensities are adjusted to give the same amount of absorbed energy. Measurements of the spectral distribution from a gas-fired heater were used for a more careful comparison between gas-fired and electrical IR dryers. For electrical dryers, no such measurements have been found in the literature and therefore a mathematical model was developed. The absorption of radiation in the thickness direction was compared for a wet paper a board with a wet core and for a coated paper The radiation from the gas-fired dryer is more readily absorbed by the paper For all these cases, the electrically generated radiation is absorbed somewhat more evenly in the thickness direction than the radiation from the gas-fired heater. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
infrared driers, absorption, infrared radiation, mathematical models, gas heaters, electric heating, z direction, wave lengths, equations
in
Journal of Pulp and Paper Science
volume
24
issue
11
pages
356 - 363
publisher
TAPPI
external identifiers
  • wos:000077077900004
  • scopus:0032207690
ISSN
0826-6220
language
English
LU publication?
yes
id
815416d4-9b54-47d2-90f5-f00ec8ada17c (old id 3914018)
date added to LUP
2013-07-01 12:22:24
date last changed
2017-01-01 06:58:24
@article{815416d4-9b54-47d2-90f5-f00ec8ada17c,
  abstract     = {A comparison of the absorption in paper of radiation from different IR sources has been made based on a theoretical model. As a first approach, blackbody spectra at 1300 K and 2500 K were compared. The radiation from the body at 1300 K is more readily absorbed by the paper There is, however only a small difference in the in-depth absorption when the intensities are adjusted to give the same amount of absorbed energy. Measurements of the spectral distribution from a gas-fired heater were used for a more careful comparison between gas-fired and electrical IR dryers. For electrical dryers, no such measurements have been found in the literature and therefore a mathematical model was developed. The absorption of radiation in the thickness direction was compared for a wet paper a board with a wet core and for a coated paper The radiation from the gas-fired dryer is more readily absorbed by the paper For all these cases, the electrically generated radiation is absorbed somewhat more evenly in the thickness direction than the radiation from the gas-fired heater.},
  author       = {Pettersson, M and Stenström, Stig},
  issn         = {0826-6220},
  keyword      = {infrared driers,absorption,infrared radiation,mathematical models,gas heaters,electric heating,z direction,wave lengths,equations},
  language     = {eng},
  number       = {11},
  pages        = {356--363},
  publisher    = {TAPPI},
  series       = {Journal of Pulp and Paper Science},
  title        = {Absorption of infrared radiation and the radiation transfer mechanism in paper. Part II: Application to infrared dryers.},
  volume       = {24},
  year         = {1998},
}