Minimizing unmet hours for DOAS chilled beam
Hi,
Currently I am trying to model 4 dedicated outdoor air systems, all of them having the same layout. This is for a school project in which the building has two stories, with 2 DOAS for each story. Each DOAS is associated with roughly 15-30 unique thermal zones. The DOAS layout has a water cooling coil > water heating coil > variable fan then branches out to the associated thermal zone (each zone having a “single duct constant volume four pipe beam”). All of the fields for the AirTerminal:SingleDuct:ConstantVolume:FourPipeBeam have been left standard. An “AEDG Hot Water Loop” has been set with the “OS:Coil:Heating:FourPipeBeam,” and an “AEDG Chilled Water Loop” has been set with the “OS:Coil:Cooling:FourPipeBeam.”
The simulation (OpenStudio) runs with no errors except there being a large amount of unmet hours. Does anyone know what might be causing the high unmet hours and what might resolve this? May it have something to do with the DOAS supply air temperature?
@LastnameFirstname what simulation tool are you using? I'm guessing EnergyPlus and/or OpenStudio based on some of the objects you've mentioned in your post. Can you add this as a tag or update the title and/or body of your post so that others know and can provide better solutions?