2007, Piran, Slovenia

Clothing
the P plots above 60%RH (participants feeling discomfort). There were differences
between the AM and PM groups. It seemed that the participants of AM group sweated
more, thus the Tcl decreased significantly.
(c) P plot (AM group) (d) Tcl plot (AM group)
(c) P plot (PM group) (d) Tcl plot (PM group)
Figure 3: Plots of Tcl and P change along time
(a) P plot (b) Tcl plot
Figure 4: Plots of Tcl and P of AM versus PM (SC).
To further investigate the influence of the testing time, two participants were asked to
participate in the AM and PM experiments (wearing SC T-shirts) respectively on
different days. As shown in Figure 4, the P for the PM results began to increase earlier
than observed in the AM trials, the peaks of P of PM results were also higher. The Tcl
of PM results was obviously higher.
DISCUSSION
By comparing the P plots of each participant wearing SC and C T-shirts in Figure 3a
and 3c, it can be found that the P of SC plots started to increase several minutes later
than the C plots. Since the two fabrics have similar construction, it can be assumed
that their warmth keeping property was the same. Based on this assumption, each
participant should begin to sweat at the same time, no matter which T-shirt he was
wearing. Therefore, the delay of P beginning to increase between SC and C can only
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