The two-stage evaporative cooling system is shown in Fig. 1 .
The hot and humid outdoor air is drawn using the fresh air fan
FAF-1 where it enters the adsorption compartment ofthe desiccant
wheel. The air loses moisture to the desiccant material and exits the
desiccant wheel at higher temperature and lower humidity ratio.
Next to the fresh air enters a sensible wheel where it exchanges heat
with the air exhausted from the room by means of the exhaust air
fan EAF-1 . The fresh air exits the sensible wheel at lower temperature and at the same humidity ratio