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Fig. 3.9. Dependence of dew point on ambient temperature and relative humidity.
As an example, if the ambient temperature is 30
°C and relative humidity is 80 %, the temperature of
the coolant must be above 27 °C in order to avoid condensation. As can be seen from Fig. 3.9, it is
always safe (from the condensation point-of-view) to use coolant temperature at or above ambient
temperature. In this respect the radiator solution (see Section 3.6.2) is an easy way to avoid
condensation issues (provided that the radiator is located appropriately).