Specify 100% outdoor air and an exhaust fan of the same size. Check the example files for “DOAS” (Dedicated Outdoor Air System”.
James V Dirkes II, PE, BEMP, LEED AP
The Building Performance Team Inc
1631 Acacia Drive, Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of giovani
Sent: Wednesday, August 15, 2012 5:31 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] No return air modeling
Dear All,
I have a question, How to simulate HVAC system that has no return air?
I get case about VAV system with exhaust fan and no return ducting. The designer has designed airflow though to exhaust fan is smaller from supply air (just half of supply air). I want to evaluate it (about energy and ventilation rate) but I have no idea how to configure the model without return air.
I really appreciate with any help. Thank you.
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