WOLFRAM SYSTEMMODELER

MassFlowSource_h

Ideal flow source that produces a prescribed mass flow with prescribed specific enthalpy, mass fraction and trace substances

Wolfram Language

In[1]:=
SystemModel["Modelica.Fluid.Sources.MassFlowSource_h"]
Out[1]:=

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)

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)

medium

Type: BaseProperties

Description: Medium in the source

Used in Examples (1)

DrumBoiler

Modelica.Fluid.Examples.DrumBoiler

Complete drum boiler model, including evaporator and supplementary components