MassFlowSource_hIdeal flow source that produces a prescribed mass flow with prescribed specific enthalpy, mass fraction and trace substances |
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Models an ideal flow source, with prescribed values of flow rate, temperature and composition:
- Prescribed mass flow rate.
- Prescribed specific enthalpy.
- Boundary composition (only for multi-substance or trace-substance flow).
If use_m_flow_in is false (default option), the m_flow parameter
is used as boundary pressure, and the m_flow_in input connector is disabled; if use_m_flow_in is true, then the m_flow parameter is ignored, and the value provided by the input connector is used instead.
The same thing goes for the temperature and composition
Note, that boundary temperature, mass fractions and trace substances have only an effect if the mass flow is from the boundary into the port. If mass is flowing from the port into the boundary, the boundary definitions, with exception of boundary flow rate, do not have an effect.
Parameters (9)
| nPorts |
Value: 0 Type: Integer Description: Number of ports |
|---|---|
| use_m_flow_in |
Value: false Type: Boolean Description: Get the mass flow rate from the input connector |
| use_h_in |
Value: false Type: Boolean Description: Get the specific enthalpy from the input connector |
| use_X_in |
Value: false Type: Boolean Description: Get the composition from the input connector |
| use_C_in |
Value: false Type: Boolean Description: Get the trace substances from the input connector |
| m_flow |
Value: 0 Type: MassFlowRate (kg/s) Description: Fixed mass flow rate going out of the fluid port |
| h |
Value: Medium.h_default Type: SpecificEnthalpy (J/kg) Description: Fixed value of specific enthalpy |
| X |
Value: Medium.X_default Type: MassFraction[Medium.nX] (kg/kg) Description: Fixed value of composition |
| C |
Value: Medium.C_default Type: ExtraProperty[Medium.nC] Description: Fixed values of trace substances |
Connectors (5)
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ports |
Type: FluidPort_b[nPorts] |
|---|---|---|
 |
m_flow_in |
Type: RealInput Description: Prescribed mass flow rate |
|
h_in |
Type: RealInput Description: Prescribed fluid specific enthalpy |
|
X_in |
Type: RealInput[Medium.nX] Description: Prescribed fluid composition |
|
C_in |
Type: RealInput[Medium.nC] Description: Prescribed boundary trace substances |
Components (1)
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medium |
Type: BaseProperties Description: Medium in the source |
|---|
Used in Examples (1)
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Modelica.Fluid.Examples.DrumBoiler Complete drum boiler model, including evaporator and supplementary components |