Wet bulb temperature evaluation is of the utmost
importance for correct design of the evaporative cooling
section, and is also a very important parameter for
absorption systems. The wetter the inlet air, the higher is
the amount of condensation in the cooling coils for the
same final temperature. The result is an increase in thermal
load on the chiller, without air temperature reduction, and
with decrease in cooling section performance. So as to
calculate wet bulb temperature, average daily wet and dry
bulb temperature values were correlated. The graphs,
reported in Figures 4 and 5 for each site, show a marked
linear distribution. Least-square linear relations obtained
from the data shown are represented by continuous curves
in the Figures. These relations allowed correlation of
average dry and wet bulb temperatures in our simulation.
The method is admittedly approximate, since it supplies a
deterministic value of wet bulb temperature for each dry
bulb temperature, consequently neglecting statistical
variations of wet bulb temperature. This is a compromise
between the need for avoiding excessive complication of