An integrated dehumidification method that combines boundary layer control with mainstream disturbance enhanced heat exchange comprises heat transfer enhancement units; within each unit, a periodic vortex is formed along a extending direction of the flow channel by setting a boundary layer flow control device adjacent to a boundary layer, thus realizing cleaning of the cold and hot side walls, as a result it destroys the boundary layer blocking heat transfer, and helps to rapidly transfer a cold and heat energy generated on the cold and hot side walls to a flow mainstream channel; a mainstream disturbance device is set on the flow mainstream channel to form an axial vortex at the back of the device to cooperate with a stream emanating from the boundary layer, thus rapidly transferring the cold and heat energy from the boundary layer to a whole field to form an even temperature field.

A HVAC system includes a housing including at least one wall, an air flow path defined at least partially by the at least one wall, and a door disposed in the air flow path, where the door is configured to i) block a flow of air through the air flow path when the door is in at least one closed position, and ii) allow the flow of air through the air flow path when the door is in a position other than the at least one closed position. A gap is formed between the door and the at least one wall when the door is in the position other than the at least one closed position. The HVAC system further includes a noise-reducing feature defined on at least a portion of the at least one wall. The noise-reducing feature configured to break up, into several smaller structures, an air flow structure formed when air flowing through the gap contacts an end of the door, thereby reducing air vibration in the gap and reducing noise of the HVAC system during operation thereof.

A vortex air handling system includes a housing, a heat exchanger, an air conducting unit, and a water handling assembly. The housing includes an air intake port, an air output port, and an interior space connecting the air intake port and the air output port. The heat exchanger is positioned in the interior space and includes a plurality of walls defining a vortex path running from an outer portion to a central portion of the walls. The air conducting unit is designed to conduct air into the air intake port, through the vortex path, and out the air output port. The water handling assembly includes a supply assembly, a Peltier water cooling unit to cool water received from the supply assembly, and a dispensing assembly to dispense cooled water received from the Peltier water cooling unit into the interior space and into contact with the heat exchanger and air passing through the heat exchanger.