Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
You have your zone and system design heating SAT set to 40C. This means there is a 0C delta T across the zone reheat coil when it sizes.
Sizing:Zone, Perimeter_ZN_4, !- Zone or ZoneList Name 40.0000, !- Zone Heating Design Supply Air Temperature {C}
Sizing:System, AC_1_SDVAV, !- AirLoop Name 40.0, !- Central Heating Design Supply Air Temperature {C}
| | 2 | No.2 Revision |
You have your zone and system design heating SAT set to 40C. This means there is a 0C delta T across the zone reheat coil when it sizes.
| | 3 | No.3 Revision |
You have your zone and system design heating SAT set to 40C. This means there is a 0C delta T across the zone reheat coil when it sizes.sizes. Lower the design heating SAT in the Sizing:System object and you should see reheat coil capacity > 0.
Sizing:Zone,
Perimeter_ZN_4, !- Zone or ZoneList Name
40.0000, !- Zone Heating Design Supply Air Temperature {C}
Sizing:System,
AC_1_SDVAV, !- AirLoop Name
40.0, !- Central Heating Design Supply Air Temperature {C}
| | 4 | No.4 Revision |
You have your zone and system design heating SAT set to 40C. This means there is a 0C delta T across the zone reheat coil when it sizes. Lower the design heating SAT in the Sizing:System object and you should see reheat coil capacity > 0.
The Sizing:Zone object specifies the design requirements for zone equipment (e.g.. PTAC, fan coil, and coils in terminal units) and the coil entering air condition used to size zone coils is usually the zone temperature. The Sizing:System object specifies the design requirements for air loops and outdoor air systems (e.g., the SAT leaving the air loop and entering the zone (or zone equipment in the case of terminal units). For zone terminal units with reheat coils, the design entering coil air temperature is the temperature of the air leaving the air loop (i.e., Sizing:System design SAT).
Sizing:Zone,
Perimeter_ZN_4, !- Zone or ZoneList Name
40.0000, !- Zone Heating Design Supply Air Temperature {C}
Sizing:System,
AC_1_SDVAV, !- AirLoop Name
40.0, !- Central Heating Design Supply Air Temperature {C}
