2007, Piran, Slovenia

Table 1 1.
Properties of the tested materials.
Thickness
(mm)
Weight
(gįm -2 )
Thermal
conductivity
(Wįm -1 K -1 )
Personal protective equipment
Emissivity for
IR
(-)
Emissivity for
Solar
(-)
Protective clothing
Orange 0.55 265 0.037 0.72 0.74
Black 0.55 265 0.029 0.90 0.77
Navy 0.55 265 0.035 0.98 0.73
Underwear
PP (for infrared test) 1.40 140 0.044 0.90 0.90
PP (for solar test) 1.13 176 0.038 0.90 0.90
RESULTS
Calculation results are plotted with the experimental ones for both the radiant conditions. The
calculation agrees well with the experiment except for the surface temperature of the PC
during the exposure to the radiant source. The measured surface temperatures are lower than
those derived by calculation. This is probably because the employed sensor measures an
intermediate temperature between the PC and the environment.
Figure 2. Experimental and calculated temperature distributions in the PC system
during the exposure to the long-wave and solar radiation, plotted against the
distance from the skin model. Initial distributions are also given.
The developed model gives a good explanation why the highest temperature arises not over
the surface, but inside the PC. That is, a part of the radiant heat flux is absorbed inside the PC,
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