Answer: In the precooler of the cold dryer, there are different numbers of baffles, which have four functions:
(1) To change the streamline of the compressed air entering the cold dryer, so that it changes from horizontal flow to turbulent flow, so as to enhance the convective heat exchange intensity between the cold and hot air flows.
(2) During the movement of the air flow, the tiny condensed water droplets gather and grow due to continuous collision with the baffle, and the centrifugal effect is generated due to the repeated change of the movement direction. The water droplets are separated from the air under the dual effects of gravity and inertia.
(3) It can extend the movement path of the cold and hot air in the precooler and prolong the contact time, so as to make the heat exchange more sufficient.
(4) It can change the convection direction of the cold and hot air, so that the forward convection becomes the deflected convection, and improve the convective heat transfer coefficient.
