2007, Piran, Slovenia

Environmental Ergonomics XII
Igor B. Mekjavic, Stelios N. Kounalakis & Nigel A.S. Taylor (Eds.), © BIOMED, Ljubljana 2007
corresponds to the increased heat loss due to the cooling, and was therefore used to define the
heat loss in the conditions investigated. However, for the analysis only the maximum P value
was used since in the future the PCG will be equipped with continuous water supply.
Measurement for each condition investigated was repeated three times. The measurements
were performed in a climatic chamber where the environmental temperature and relative
humidity were kept at 20 ±1°C and 50 ±3%, respectively. The mean wind speed was 0.74
±0.02 m/s (MiniAir2, Schiltknecht, Gossau, Switzerland).
With the use of the heating cylinder, we investigated the heat loss (i) when the thinner or the
thicker membrane contacted the air, (ii) when the fit of PCG on the surface of the manikin
changed, and (iii) when different fabrics were placed over the PCG. To investigate the effect
of placing different fabrics over the PCG one synthetic (80% polyester and 20%
polyurethane) and two cotton fabrics distinctive by their thickness were used. Furthermore,
with the use of the anatomically formed manikin, we investigated the heat loss of a pants and
a shirt (Figure 2A), manufactured from PCG and tailored to fit the manikin. Heat loss was
investigated while the manikin was standing still and wore pants and shirt made of PCG.
Furthermore, when the manikin was either standing still or was walking (2.5 km/h) with
clothing typically for female (Figure 2B) or male (Figure 2C) were placed over the PCG. All
clothing was 100% cotton and there was no additional layer between the manikin and the
PCG and the PCG and the clothing.
A B C
Figure 2 The clothing ensemble manufactured from the PCG (A), and the female (B) and
male (C) clothing as used on the manikin.
Statistics: According to the data, the statistical analysis was performed with either a Student ttest
or ANOVA, where a Tukey test for post hoc comparisons was used if a significant
difference was found (p < 0.05).
RESULTS
With placing the thicker membrane in contact with the air, the heat loss significantly
(p