Title
Dry and wet heat transfer through clothing dependent on the clothing properties under cold conditions
Author
TNO Defensie en Veiligheid
Richards, M.G.M.
Rossi, R.
Meinander, H.
Broede, P.
Candas, V.
den Hartog, E.A.
Holmér, I.
Nocker, W.
Havenith, G.
Publication year
2008
Abstract
The purpose of this study was to investigate the effect of moisture on the heat transfer through clothing in relation to the water vapour resistance, type of underwear, location of the moisture and climate. This forms part of the work performed for work package 2 of the European Union THERMPROTECT project. Thermal manikin results of dry and wet heat loss are presented from different laboratories for a range of 2-layer clothing with similar dry insulations but different water vapour permeabilities and absorptive properties. The results obtained from the different manikins are generally consistent with one another. For each climate, total wet heat loss is predominately dependent on the permeability of the outer layer. At 10 °C, the apparent evaporative heat loss is markedly higher than expected from evaporation alone (measured at 34 °C), which is attributed to condensation within the clothing and to increased conductivity of the wet clothing layers.Chemicals / CAS: water, 7732-18-5; Water, 7732-18-5
Subject
Clothing systems
Heat transfer
Moisture condensation
Wet conduction
Sweat
Thermal conductivity
Clothing
Cold
Humans
Materials Testing
Sweat
Thermal Conductivity
Water
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TNO identifier
241137
ISSN
1080-3548
Source
International Journal of Occupational Safety and Ergonomics (JOSE), 14 (14), 69-76
Document type
article