In my Energy Plus model, I have a low temp (hydronic) radiant system and a single duct uncontrolled air terminal (connected to an AHU with a heating & cooling coil) serving the same thermal zone. I want the radiant system to be the main heating component and any remaining zone loads to be met by the other equipment. So as to do this, I already defined heating priority # 1 to radiant heating system and # 2 to single duct air terminal. However, my simulation results show that radiant system is not operating at all and all the zone loads are still met by air terminal units. How can I reverse this operation? Is there any other settings that can successfully couple these two systems?
Thanks in Advance.
Omer T. Karaguzel PhD Candidate
Center for Building Performance & Diagnostics (CBPD)
Carnegie Mellon University
Pittsburgh, PA 15213