Can DOAS AirLoop flow rates be scheduled?
We are trying to model a dedicated outdoor air system that modifies its flow based on a time of day schedule.
By adding a fractional schedule to the Maximum Fraction of Outdoor Air Schedule Name in the Controller:OutdoorAir object, this achieves the desired reduction in outdoor air. However, the flow in the AirLoop itself does not change and the system becomes a recirc systems at hours where the max OA fraction is scheduled to be less than 1.
As a result we don't see the fan power savings we expect, and also now have to contend with recirc air which isn't real. Is there a way to get the whole air systems flow rate to follow our fractional schedule?
@Abarker it sounds like you are using EnergyPlus, but are you using one of its interfaces (DesignBuilder, OpenStudio, etc.) to create and edit the EnergyPlus model?
Attaching your sample file (idf or whatever format you have) would also be helpful to describing the system you're modeling.
Hi @Aaron Boranian, the model geometry was built using the OS SketchUp plugin and then edited further in IDF editor. All HVAC objects start as HVACTemplate and are then modified / refined further as needed.