Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The grouping that was described in the EnergyPlus example is just grouping within a single zone (for multiple offices being modeled as a single zone). In the OpenStudio Application you can access internal mass object through the internal loads tab. It requires you to choose a construction for the internal mass along with a square footage. You can add one or multiple internal mass objects to a space/zone depending on what you need. And in your case you may need to add these to each space/zone.
There are two other approaches to do this in OpenStudio. One is to model each unit a a space and then combine multiple spaces to a zone. OpenStudio will convert the space that are not part of the zone boundary to internal mass objects when converting to an EnergyPlus file prior to simulation. You can also create interior partitions in OpenStudio which is a surface group that lives within a space. OpenStudio interior partitions can be converted to internal mass objects when OpenStudio converts to an EnergyPlus IDF file.
