modelAirsideEconomizer
Controller for airside economizer
Information
This model implements an airside economizer controller to modulate the outdoor air damper in order to maintain desired mixed air temperature. When the airside economizer is open, which means the system is in free cooling or partial mechanical cooling, the position of the OA damper is controlled by a PI controller to maintain a desired mixed air temperature; otherwise, the position of the OA damper is set as closed.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | minOAFra | Minimum outdoor air fraction | |
| Control | |||
| Real | gai | 1 | Gain of controller |
| Modelica.Units.SI.Time | Ti | 50 | Integrator time |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | TMixAirSet | Mixed air setpoint temperature | |
| Modelica.Blocks.Interfaces.RealInput | TMixAirMea | Measured mixed air temperature | |
| Modelica.Blocks.Interfaces.IntegerInput | cooMod | Cooling mode of the cooling system | |
| Modelica.Blocks.Interfaces.RealOutput | y | Connector of Real output signal | |
| Buildings.Controls.Continuous.LimPID | con | PID controller |
Revisions
-
August 16, 2017 by Yangyang Fu:
First implementation.