For HVAC systems where the DOAS unit is supplying air for ventilation, latent control and possible zone sensible cooling, the airflow control will need to include sensors and control algorithms for latent and sensible temperature
control, as well as IAQ control.
While the DD reduces the latent energy by removing water, it increases the sensible load by a greater factor by increasing sensible temperature
. In conclusion, the system will perform better without the DD, reducing the load on the AHU.
The fan position was included since the sensible temperature
rise across the fan has a significant impact on the DEC performance.