VRF fluid control heating: heating coil heating rate + supplemental coil heating rate not matching air terminal heating rate

[yujiex]

Issue overview

When one VRF serves one conditioned zone with one terminal unit, we would expect the "Zone VRF Air Terminal Total Heating Rate" to match the "Heating Coil Heating Rate"+ supplemental coil heating rate + Fan heating rate - outdoor air load. However, we observed some mismatches between these two quantities, as is shown in the following plot

Details

Some additional details for this issue (if relevant):

• Platform (MacOS 13.5)
• Version of EnergyPlus (23.1)

Defect file

idf:
US+SF+CZ4A+hp+crawlspace+IECC_2006_VRF.idf.txt

epw:
USA_NY_New.York-John.F.Kennedy.Intl.AP.744860_TMY3.epw.txt

Checklist

Add to this list or remove from it as applicable. This is a simple templated set of guidelines.

• Defect file added (list location of defect file here)
• Ticket added to Pivotal for defect (development team task)
• Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)

[mjwitte]

Zone VRF Air Terminal Total Heating Rate is relative to the zone. So Total Heating Rate = Heating Coil + Supp Heating Coil + Fan Heat - Outdoor Air Load.

[yujiex]

Zone VRF Air Terminal Total Heating Rate is relative to the zone. So Total Heating Rate = Heating Coil + Supp Heating Coil + Fan Heat - Outdoor Air Load.

I'll add Fan Heat and outdoor air load to the system. The outdoor air mass flow rate is around 0.03kg/s