2007, Piran, Slovenia

Environmental Ergonomics XII
Igor B. Mekjavic, Stelios N. Kounalakis & Nigel A.S. Taylor (Eds.), © BIOMED, Ljubljana 2007
RESULT
Water Vapor Resistance (Ret): Table 2 shows Ret values of the 3 ensembles. JSLIST has a
lower water vapor resistance than the BDO, but both were still on the same level for
breathable properties. The emergency CB could be considered to be non-breathable [7].
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Table 2 Testing result of Ret
Sample Type Ret (Pa.m 2 /W) Method
JSLIST 6.1 ISO 11092
BDO 8.6
Emergency CB 346.2
Temperature Response of sweating torso in summer condition: The tendency of the curves in
Figure 1 showed that the JSLIST seemed to be the best structure for dissipating heat produced
by a person in moderate metabolic during the summer condition. Figure 2 shows that the same
sequence of wearing temperature for the 3 suits in a high metabolic state as that in moderate
metabolic state. However, the temperature of those CB suits in high metabolic state was
above 1 o C higher than those in moderate metabolic state.
Temp.ˇ ]˘ Jˇ ^
39.5
39
38.5
38
37.5
37
36.5
36
35.5
35
34.5
0 0.5 1 1.5 2 2.5 3 3.5
Timeˇ ]hrˇ ^
JSLIST
indigenous BDO
emergency CB
Figure 1. Temperature of three suits in moderate metabolic state and summer condition
Sweating manikin testing result: Table 3 showed the thermal insulation, moisture vapor index,
total heat transfer (Hd+He). The result described the capability of heat dissipation for the 3
CB clothing system dressed in summer condition. Under the metabolic rate of 360 W/ and
520 W/ , the total heat transfer of JSLIST, BDO and emergency CB individually was just
185, 177, 94 W/ in summer condition. Therefore, the 3 CB suits could not sufficiently get
rid of metabolic heat completely, and the heat was gradually cumulated in human body.