modelIdealUser
Ideal user model
Information
This is a simple ideal user model used by
Buildings.DHC.Plants.Cooling.Examples.StoragePlantDualSource.
The load of the user is described by a varying mass flow rate setpoint.
The valve is controlled to maintain the requested mass flow rate.
The model sets its leaving water temperature to the user-specified temperature
T_CHWR_nominal.
Parameters
| Type | Name | Default | Description |
|---|
| Modelica.Units.SI.MassFlowRate | m_flow_nominal | | Nominal mass flow rate |
| Modelica.Units.SI.Temperature | T_CHWR_nominal | | Nominal temperature of CHW return |
| Modelica.Units.SI.PressureDifference | dp_nominal | | Nominal pressure drop when valve is fully open |
Components
| Type | Name | Default | Description |
|---|
| Buildings.Fluid.Actuators.Valves.TwoWayEqualPercentage | val | | User control valve |
| Buildings.Controls.Continuous.LimPID | conPI | | PI controller |
| Modelica.Blocks.Interfaces.RealInput | mPre_flow | | Load in terms of flow rate prescription |
| Modelica.Blocks.Interfaces.RealOutput | yVal_actual | | Consumer control valve actuator position |
| Buildings.Fluid.Sensors.RelativePressure | senRelPre | | Differential pressure sensor |
| Modelica.Blocks.Interfaces.RealOutput | dp | | Differential pressure from the sensor |
| Modelica.Fluid.Interfaces.FluidPort_a | port_a | | Fluid connector a (positive design flow direction is from port_a to port_b) |
| Modelica.Fluid.Interfaces.FluidPort_b | port_b | | Fluid connector b (positive design flow direction is from port_a to port_b) |
| Buildings.Fluid.Sensors.MassFlowRate | senMasFlo | | Mass flow rate sensor |
| Buildings.Fluid.Sources.PropertySource_T | proSou | | Ideal temperature source |
| Modelica.Blocks.Sources.Constant | TRet | | Constant CHW return temperature |
Contents
| Name | Description |
|---|
| Medium | Medium package |
Revisions
-
July 31, 2023, by Michael Wetter:
Revised implementation, removed unused parameter.
-
February 18, 2022 by Hongxiang Fu:
First implementation. This is for
#2859.