2007, Piran, Slovenia

Environmental Ergonomics XII
Igor B. Mekjavic, Stelios N. Kounalakis & Nigel A.S. Taylor (Eds.), © BIOMED, Ljubljana 2007
Table 1: Experimental conditions for the acclimation series (Griefahn, 1997). Air velocity
was 0.5 ms -1 for the radiation and 0.3 ms -1 for the other series.
Type of
Air Wet-bulb Mean radiant Duration of
climate
temp. (Ta) temp. (Twb) temp. (Tr) series
warm-humid 37°C 32.0°C Tr = Ta 15 days
hot-dry 50°C 26.5°C Tr = Ta 15 days
radiation 25°C 16.2°C Tr = 90.8 °C 15 days
neutral 25°C 19.5°C Tr = Ta 12 days
Figure 1: Change in time response of Tco of a person during acclimation to dry heat. The grey
shaded area indicates heat exposure time. Ta was 22°C in the first and final resting periods.
Table 2: ANOVA results for the development of resting and final Tco over the first 12 days in
4 climates. Nominator and denominator degrees of freedom (df1, df2), F- and p-values.
386
Effect
Resting Tco
Final Tco
df1 df2 F p df1 df2 F p
day 11 308 3.22 0.0004 11 308 6.52