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Change of footwear insulation at various sweating rates

På svenska

Author

  • Kalev Kuklane
  • Ingvar Holmér
  • Gordon Giesbrecht

Summary, in English

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.

Publishing year

1999

Language

English

Pages

161-168

Publication/Series

Journal of Physiological Anthropology Applied Human Science

Volume

18

Issue

5

Document type

Journal article

Publisher

BioMed Central (BMC)

Topic

  • Production Engineering, Human Work Science and Ergonomics

Keywords

  • thermal foot model footwear sweating insulation reduction estimation

Status

Published

Research group

  • Thermal Environment Laboratory

ISBN/ISSN/Other

  • ISSN: 1345-3475