Humidity control by DOAS Part 2

This note illustrates the humidity control of HVAC system by DOAS. The processes are shown in the Psychrometric chart.

In this case, the DOAS handles the entire room latent load, while the AHU/FCU cooling coil is responsible only for the room sensible heat load.

Related notes:

Humidity control by DOAS Part 1

Air conditioning process in summer at partial load condition Part 1 (CAV)

Air conditioning process in summer at partial load condition Part 2 (VAV)

Psychrometric process – sensible cooling

Psychrometric process – sensible heating