Modelica.Media.Examples.Tests.Components

Information

Package Content

Name	Description
FluidPort	Interface for quasi one-dimensional fluid flow in a piping network (incompressible or compressible, one or more phases, one or more substances)
FluidPort_a	Fluid connector with filled icon
FluidPort_b	Fluid connector with outlined icon
PortVolume	Fixed volume associated with a port by the finite volume method
FixedMassFlowRate	Ideal pump that produces a constant mass flow rate from a large reservoir at fixed temperature and mass fraction
FixedAmbient	Ambient pressure, temperature and mass fraction source
ShortPipe	Simple pressure loss in pipe
PartialTestModel	Basic test model to test a medium
PartialTestModel2	Slightly larger test model to test a medium

Modelica.Media.Examples.Tests.Components.FluidPort

Information

Parameters

Name	Description
replaceable package Medium	Medium model

Contents

Name	Description
replaceable package Medium	Medium model
p	Pressure in the connection point [Pa]
m_flow	Mass flow rate from the connection point into the component [kg/s]
h	Specific mixture enthalpy in the connection point [J/kg]
H_flow	Enthalpy flow rate into the component (if m_flow > 0, H_flow = m_flow*h) [W]
Xi[Medium.nXi]	Independent mixture mass fractions m_i/m in the connection point [kg/kg]
mXi_flow[Medium.nXi]	Mass flow rates of the independent substances from the connection point into the component (if m_flow > 0, mX_flow = m_flow*X) [kg/s]
C[Medium.nC]	Properties c_i/m in the connection point
mC_flow[Medium.nC]	Flow rates of auxiliary properties from the connection point into the component (if m_flow > 0, mC_flow = m_flow*C) [kg/s]

Modelica.Media.Examples.Tests.Components.FluidPort_a

Information

Parameters

Name	Description
replaceable package Medium	Medium model

Contents

Name	Description
p	Pressure in the connection point [Pa]
m_flow	Mass flow rate from the connection point into the component [kg/s]
h	Specific mixture enthalpy in the connection point [J/kg]
H_flow	Enthalpy flow rate into the component (if m_flow > 0, H_flow = m_flow*h) [W]
Xi[Medium.nXi]	Independent mixture mass fractions m_i/m in the connection point [kg/kg]
mXi_flow[Medium.nXi]	Mass flow rates of the independent substances from the connection point into the component (if m_flow > 0, mX_flow = m_flow*X) [kg/s]
C[Medium.nC]	Properties c_i/m in the connection point
mC_flow[Medium.nC]	Flow rates of auxiliary properties from the connection point into the component (if m_flow > 0, mC_flow = m_flow*C) [kg/s]

Modelica.Media.Examples.Tests.Components.FluidPort_b

Information

Parameters

Name	Description
replaceable package Medium	Medium model

Contents

Name	Description
p	Pressure in the connection point [Pa]
m_flow	Mass flow rate from the connection point into the component [kg/s]
h	Specific mixture enthalpy in the connection point [J/kg]
H_flow	Enthalpy flow rate into the component (if m_flow > 0, H_flow = m_flow*h) [W]
Xi[Medium.nXi]	Independent mixture mass fractions m_i/m in the connection point [kg/kg]
mXi_flow[Medium.nXi]	Mass flow rates of the independent substances from the connection point into the component (if m_flow > 0, mX_flow = m_flow*X) [kg/s]
C[Medium.nC]	Properties c_i/m in the connection point
mC_flow[Medium.nC]	Flow rates of auxiliary properties from the connection point into the component (if m_flow > 0, mC_flow = m_flow*C) [kg/s]

Modelica.Media.Examples.Tests.Components.PortVolume

Information

This component models the volume of fixed size that is associated with the fluid port to which it is connected. This means that all medium properties inside the volume, are identical to the port medium properties. In particular, the specific enthalpy inside the volume (= medium.h) is always identical to the specific enthalpy in the port (port.h = medium.h). Usually, this model is used when discretizing a component according to the finite volume method into volumes in internal ports that only store energy and mass and into transport elements that just transport energy, mass and momentum between the internal ports without storing these quantities during the transport.

Parameters

Name	Description
replaceable package Medium	Medium model
V	Fixed size of junction volume [m3]
Initial pressure or initial density
use_p_start	Select p_start or d_start
p_start	Initial pressure [Pa]
d_start	Initial density [kg/m3]
Initial temperature or initial specific enthalpy
use_T_start	Select T_start or h_start
T_start	Initial temperature [K]
h_start	Initial specific enthalpy [J/kg]
Only for multi-substance flow
X_start[Medium.nX]	Initial mass fractions m_i/m [kg/kg]

Connectors

Name	Description
replaceable package Medium	Medium model
port

Modelica.Media.Examples.Tests.Components.FixedMassFlowRate

Information

Parameters

Name	Description
m_flow	Fixed mass flow rate from an infinite reservoir to the fluid port [kg/s]
X_ambient[Medium.nX]	Ambient mass fractions m_i/m of reservoir [kg/kg]
replaceable package Medium	Medium model
Ambient temperature or ambient specific enthalpy
use_T_ambient	Select T_ambient or h_ambient
T_ambient	Ambient temperature [K]
h_ambient	Ambient specific enthalpy [J/kg]

Connectors

Name	Description
replaceable package Medium	Medium model
port

Modelica.Media.Examples.Tests.Components.FixedAmbient

Information

Model FixedAmbient_pt defines constant values for ambient conditions:

• Ambient pressure.
• Ambient temperature.
• Ambient mass fractions (only for multi-substance flow).

Note, that ambient temperature and mass fractions have only an effect if the mass flow is from the ambient into the port. If mass is flowing from the port into the ambient, the ambient definitions, with exception of ambient pressure, do not have an effect.

Parameters

Name	Description
replaceable package Medium	Medium model
Ambient pressure or ambient density
use_p_ambient	Select p_ambient or d_ambient
p_ambient	Ambient pressure [Pa]
d_ambient	Ambient density [kg/m3]
Ambient temperature or ambient specific enthalpy
use_T_ambient	Select T_ambient or h_ambient
T_ambient	Ambient temperature [K]
h_ambient	Ambient specific enthalpy [J/kg]
Only for multi-substance flow
X_ambient[Medium.nX]	Ambient mass fractions m_i/m [kg/kg]

Connectors

Name	Description
replaceable package Medium	Medium model
port

Modelica.Media.Examples.Tests.Components.ShortPipe

Information

Model ShortPipe defines a simple pipe model with pressure loss due to friction. It is assumed that no mass or energy is stored in the pipe.

Parameters

Name	Description
replaceable package Medium	Medium model
dp_nominal	Nominal pressure drop [Pa]
m_flow_nominal	Nominal mass flow rate at nominal pressure drop [kg/s]

Connectors

Name	Description
replaceable package Medium	Medium model
port_a
port_b

Modelica.Media.Examples.Tests.Components.PartialTestModel

Information

Parameters

Name	Description
replaceable package Medium	Medium model
p_start	Initial value of pressure [Pa]
T_start	Initial value of temperature [K]
h_start	Initial value of specific enthalpy [J/kg]
X_start[Medium.nX]	Initial value of mass fractions

Connectors

Name	Description
replaceable package Medium	Medium model

Modelica.Media.Examples.Tests.Components.PartialTestModel2

Information

Parameters

Name	Description
replaceable package Medium	Medium model
p_start	Initial value of pressure [Pa]
T_start	Initial value of temperature [K]
h_start	Initial value of specific enthalpy [J/kg]
X_start[Medium.nX]	Initial value of mass fractions

Connectors

Name	Description
replaceable package Medium	Medium model