modelChiller
Chiller controller
Information
This is a controller for the chiller system, which includes the dedicated condenser and evaporator pumps.
The system is enabled if any of the input control signals uHea
or uCoo is true.
When enabled,
- the condenser and evaporator pumps are operated at constant speed, and
- the condenser (resp. evaporator) mixing valve is modulated with a PI loop controlling the minimum (resp. maximum) inlet temperature.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | TConWatEntMin | Minimum value of condenser water entering temperature | |
| Real | TEvaWatEntMax | Maximum value of evaporator water entering temperature |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Interfaces.BooleanInput | uCoo | Cooling enable signal | |
| Buildings.Controls.OBC.CDL.Interfaces.BooleanInput | uHea | Heating enable signal | |
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | TConWatEnt | Condenser water entering temperature | |
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | TEvaWatEnt | Evaporator water entering temperature | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | yValCon | Condenser mixing valve control signal | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | yValEva | Evaporator mixing valve control signal | |
| Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput | yChi | Chiller enable signal |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Logical.Or | heaOrCoo | Heating or cooling enabled | |
| Buildings.Controls.OBC.Utilities.PIDWithEnable | conValEva | Evaporator three-way valve control | |
| Buildings.Controls.OBC.Utilities.PIDWithEnable | conValCon | Condenser three-way valve control | |
| Buildings.Controls.OBC.CDL.Reals.Sources.Constant | maxTEvaWatEnt | Maximum value of evaporator water entering temperature | |
| Buildings.Controls.OBC.CDL.Reals.Sources.Constant | minTConWatEnt | Minimum value of condenser water entering temperature |
Revisions
-
July 31, 2020, by Antoine Gautier:
First implementation.