Dry and wet heat transfer through clothing dependent on the clothing properties under cold conditions.
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 each other. For each climate, total wet heat loss is predominately dependent on the permeability of the outer layer. At 10 degrees C, the apparent evaporative heat loss is markedly higher than expected from evaporation alone (measured at 34 degrees C), which is attributed to condensation within the clothing and to increased conductivity of the wet clothing layers.
Richards
Mark G M
MG
EMPA, Swiss Federal Laboratories for Materials Testing and Research, St. Gallen, Switzerland. mark.richards@empa.ch
Rossi
René
R
Meinander
Harriet
H
Broede
Peter
P
Candas
Victor
V
den Hartog
Emiel
E
Holmér
Ingvar
I
Nocker
Wolfgang
W
Havenith
George
G
D003020:Clothing; D003080:Cold Temperature; D006801:Humans; D008422:Materials Testing; D013542:Sweat; D013814:Thermal Conductivity; D014867:Water
D014867:Water