What does Dew point -40C mean in an air drying unit.

Answer Posted / murthy

dew point temp is temp at which the first dew will be
formed if compressed. air dew point is defined because of
dew formation due to C02 & water which forms dry ice ,not
because of air liquefication.air with dew point -40C means
it is temperature upto which there will be no dew formation
upto this temp if pressure is increased even upto critical
pressure

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