Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I modified the 5ZoneAirCooled.idf example file that comes with EnergyPlus in order to inspect this. I created two files - one with a 70F heating setpoint and 72F cooling setpoint and teh other with a 70F heating setpoint and a 74F cooling setpoint
Both show appropriate control of heating and cooling most of the time. However, in the heating months, there are occasional times during the heating season, when the cooling setpoint is overshot. I haven't as yet pinpointed the exact cause, but it may be related to the supply air temperature setpoint during winter months.
This test model was created by modifying the EnergyPlus example file in EP3. Diagrams and data visualization are also generated with EP3.
| | 2 | No.2 Revision |
I modified the 5ZoneAirCooled.idf example file that comes with EnergyPlus in order to inspect this. I created two files - one with a 70F heating setpoint and 72F cooling setpoint and teh other with a 70F heating setpoint and a 74F cooling setpoint
Both show appropriate control of heating and cooling most of the time. However, in the heating months, there are occasional times during the heating season, when the cooling setpoint is overshot. I haven't as yet pinpointed the exact cause, but it may be related to the supply air temperature setpoint during winter months.
This test model was created by modifying the EnergyPlus example file in EP3. Diagrams and data visualization are also generated with EP3.
| | 3 | No.3 Revision |
I modified the 5ZoneAirCooled.idf example file that comes with EnergyPlus in order to inspect this. I created two files - one with a 70F heating setpoint and 72F cooling setpoint and teh other with a 70F heating setpoint and a 74F cooling setpoint
Both show appropriate control of heating and cooling most of the time. However, in the heating months, there are occasional times during the heating season, when the cooling setpoint is overshot. I haven't as yet pinpointed the exact cause, but it may be related to the supply air temperature setpoint during winter months.
This test model was created by modifying the EnergyPlus example file in EP3. Diagrams and data visualization are also generated with EP3.
| | 4 | No.4 Revision |
I modified the 5ZoneAirCooled.idf example file that comes with EnergyPlus in order to inspect this. I created two files - one with a 70F heating setpoint and 72F cooling setpoint and teh other with a 70F heating setpoint and a 74F cooling setpoint
Both show appropriate control of heating and cooling most of the time. However, in the heating months, there are occasional times during the heating season, when the cooling setpoint is overshot. I haven't as yet pinpointed the exact cause, but it may be related to the supply air temperature setpoint during winter months.
This test model was created by modifying the EnergyPlus example file in EP3. Diagrams and data visualization are also generated with EP3.
| | 5 | No.5 Revision |
I modified the 5ZoneAirCooled.idf example file that comes with EnergyPlus in order to inspect this. I created two files - one with a 70F heating setpoint and 72F cooling setpoint and teh other with a 70F heating setpoint and a 74F cooling setpoint
Both show appropriate control of heating and cooling most of the time. However, in the heating months, there are occasional times during the heating season, when the cooling setpoint is overshot. I haven't as yet pinpointed the exact cause, but it may be related to the supply air temperature setpoint during winter months.
This test model was created by modifying the EnergyPlus example file in EP3. Diagrams and data visualization are also generated with EP3.
| | 6 | No.6 Revision |
I modified the 5ZoneAirCooled.idf example file that comes with EnergyPlus in order to inspect this. I created two files - one with a 70F heating setpoint and 72F cooling setpoint and teh other with a 70F heating setpoint and a 74F cooling setpoint
Both show appropriate control of heating and cooling most of the time. However, in the heating months, there are occasional times during the heating season, when the cooling setpoint is overshot. I haven't as yet pinpointed the exact cause, but it may be related to the supply air temperature setpoint during winter months.
This test model was created by modifying the EnergyPlus example file in EP3. Diagrams and data visualization are also generated with EP3.
EDIT
The times when space temperature was overshot in the above models was due to the chiller plant not being available during the winter months. Thus the AirLoopHVAC was not meeting setpoint. The VAV damper control (which is what this question is about) is adequately adjusting flow and temperature to meet Zone temperature setpoints even when there is only a 2F spread between heating and cooling setpoints (70F and 72F):
This test model was created by modifying the EnergyPlus example file in EP3. Diagrams and data visualization are also generated with EP3.
