Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
OpenStudio uses the EnergyPlus object named HVACTemplate:Zone:IdealLoadsAirSystem, which expands into ZoneHVAC:IdealLoadsAirSystem to model ideal systems. Ultimately the ZoneHVAC:IdealLoadsAirSystem does connect to the zone via nodes, however this is managed by OpenStudio for you. All that you normally need to do is check the box to enable ideal air loads. Are you enabling ideal air loads using the interface in the screenshot? Can you provide the full error message, or perhaps even the entire model?
| | 2 | No.2 Revision |
OpenStudio uses the EnergyPlus object named HVACTemplate:Zone:IdealLoadsAirSystem, which expands into ZoneHVAC:IdealLoadsAirSystem to model ideal systems. Ultimately the ZoneHVAC:IdealLoadsAirSystem does connect to the zone via nodes, however this is managed by OpenStudio for you. All that you normally need to do is check the box to enable ideal air loads. Are you enabling ideal air loads using the interface in the screenshot? Can you provide the full error message, or perhaps even the entire model?
Update
After reviewing the model I found that the failure is caused by a VAV air system that does not have any zones attached.
I added a terminal and attached the two zones in the model that did not have ideal air loads turned on (zones 8 and 9) and the model did simulate. You could alternatively remove the system (and supporting plant) entirely.
There are still some warnings that you might want to heed. Particularly the warning about no thermostats in the zones.
