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Change of footwear insulation at various sweating rates

In English

Författare

  • 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.

Publiceringsår

1999

Språk

Engelska

Sidor

161-168

Publikation/Tidskrift/Serie

Journal of Physiological Anthropology Applied Human Science

Volym

18

Issue

5

Dokumenttyp

Artikel i tidskrift

Förlag

BioMed Central (BMC)

Ämne

  • Production Engineering, Human Work Science and Ergonomics

Nyckelord

  • thermal foot model footwear sweating insulation reduction estimation

Status

Published

Forskningsgrupp

  • Thermal Environment Laboratory

ISBN/ISSN/Övrigt

  • ISSN: 1345-3475