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Change of footwear insulation at various sweating rates

Kuklane, Kalev LU ; Holmér, Ingvar LU and Giesbrecht, Gordon (1999) In Applied Human Science, Journal of Physiological Anthropology 18(5). p.161-168
Abstract
Moisture inside the footwear can considerably affect the thermal insulation. In this study with a thermal foot model there was simulated three sweat rates (3, 5 and 10 g/h). Five types of footwear with various insulation levels (dry insulation from 0.19 to 0.50 m2•K/W) were tested. The footwear insulation reduction was calculated for 1.5 hour period. The reduction in insulation was related to sweating rate and initial insulation. The footwear with high insulation lost even in percentile more insulation than thin boots at the same conditions (9-19 % at 3 g/h, 13-27 % at 5 g/h and 19-36 % at 10 g/h). A relationship between insulation decrease and sweating rate was established. An 8-hour sweating test (5 g/h) and a test for determining... (More)
Moisture inside the footwear can considerably affect the thermal insulation. In this study with a thermal foot model there was simulated three sweat rates (3, 5 and 10 g/h). Five types of footwear with various insulation levels (dry insulation from 0.19 to 0.50 m2•K/W) were tested. The footwear insulation reduction was calculated for 1.5 hour period. The reduction in insulation was related to sweating rate and initial insulation. The footwear with high insulation lost even in percentile more insulation than thin boots at the same conditions (9-19 % at 3 g/h, 13-27 % at 5 g/h and 19-36 % at 10 g/h). A relationship between insulation decrease and sweating rate was established. An 8-hour sweating test (5 g/h) and a test for determining evaporative heat losses were carried out in addition. The insulation reduction during the first 1.5 hours of the 8-hour test answered for more than half of the total reduction. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
keywords
thermal foot model footwear sweating insulation reduction estimation
in
Applied Human Science, Journal of Physiological Anthropology
volume
18
issue
5
pages
161 - 168
ISSN
1345-3475
language
English
LU publication?
no
id
f1bd6556-6a04-4a28-bae5-60cc91410c3c (old id 633338)
date added to LUP
2008-02-21 14:34:39
date last changed
2016-04-16 11:50:52
@misc{f1bd6556-6a04-4a28-bae5-60cc91410c3c,
  abstract     = {Moisture inside the footwear can considerably affect the thermal insulation. In this study with a thermal foot model there was simulated three sweat rates (3, 5 and 10 g/h). Five types of footwear with various insulation levels (dry insulation from 0.19 to 0.50 m2•K/W) were tested. The footwear insulation reduction was calculated for 1.5 hour period. The reduction in insulation was related to sweating rate and initial insulation. The footwear with high insulation lost even in percentile more insulation than thin boots at the same conditions (9-19 % at 3 g/h, 13-27 % at 5 g/h and 19-36 % at 10 g/h). A relationship between insulation decrease and sweating rate was established. An 8-hour sweating test (5 g/h) and a test for determining evaporative heat losses were carried out in addition. The insulation reduction during the first 1.5 hours of the 8-hour test answered for more than half of the total reduction.},
  author       = {Kuklane, Kalev and Holmér, Ingvar and Giesbrecht, Gordon},
  issn         = {1345-3475},
  keyword      = {thermal foot model footwear sweating insulation reduction estimation},
  language     = {eng},
  number       = {5},
  pages        = {161--168},
  series       = {Applied Human Science, Journal of Physiological Anthropology},
  title        = {Change of footwear insulation at various sweating rates},
  volume       = {18},
  year         = {1999},
}