PRECOOLER/CHILLER/REHEATER HEAT EXCHANGER FOR AIR DRYERS

摘要

A heat exchanger (10) comprising a precooler and reheater core (12) adjacent a chiller core (14), first heat transfer passages (52, 54) extending through both cores through which incoming air passes in a first direction, second heat transfer passages (56) extending through the chiller core through which coolant passes in heat exchange relationship with incoming air and perpendicular to the first direction, and third heat transfer passages (60) extending through the precooler and reheater core (12) through which cooled air from the chiller core passes in heat exchange relationship with the incoming air and perpendicular to the first direction. A manifold (40) contiguous with both cores conducts chilled air from the chiller core to the third set of heat transfer passages. Incoming air is chilled in the chiller core and thereafter exchanges heat with the incoming air in the precooler and reheater core to precool the incoming air to form water droplets and to raise the temperature of the chilled air.