modelPCV
Extends from ThermofluidStream.Interfaces.SISOFlow.
Information
This component can be used to emulate a pressure-drop or output-pressure regulated control valve, depending on the chosen valve mode.
Depending on the parameter mode, either the pressure at the outlet p_out or the pressure difference dp between inlet and outlet can be stipulated. This is done either by parameter pressure_set_par or via input connector pressure_set_var when setting pressureFromInput = true. The resulting mass flow will be determined by its usual dynamics.
Setting dp instead of p_out has advantages, when p_out is determined by a volume at the outlet (for instance an accumulator).
The pressure difference dp is normalized, such that it cannot create pressure and it is zero for zero or negative mass flow.
If the desired pressure drop or outlet pressure, i.e. the target pressure drop in either case, can't be reached, a red dot shows up on the icon.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Mode | mode | ThermofluidStream.FlowControl.Internal.Types.PressureControlValveMode.drop | Valve mode |
| SI.Pressure | eps | 1 | Threshold for visual warning |
| Pressure setpoint | |||
| Boolean | pressureFromInput | false | If true, pressure input connector is enabled |
| SI.AbsolutePressure | pressure_set_par | 0 | Setpoint for pressure / pressure difference |
| Advanced | |||
| SI.MassFlowRate | m_flow_reg | dropOfCommons.m_flow_reg | Regularization mass flow |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | pressure_set_var | Pressure input connector [Pa] | |
| SI.Pressure | dp_raw | Not normalized desired dp |