Modelica.Media.Examples.Tests.Components

Functions, connectors and models needed for the media model tests

Information

Extends from Modelica.Icons.Library (Icon for library).

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

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

Interface for quasi one-dimensional fluid flow in a piping network (incompressible or compressible, one or more phases, one or more substances)

Information

Type Name Description

AbsolutePressure p Pressure in the connection point [Pa]

flow MassFlowRate m_flow Mass flow rate from the connection point into the component [kg/s]

SpecificEnthalpy h Specific mixture enthalpy in the connection point [J/kg]

flow EnthalpyFlowRate H_flow Enthalpy flow rate into the component (if m_flow > 0, H_flow = m_flow*h) [W]

MassFraction Xi[Medium.nXi] Independent mixture mass fractions m_i/m in the connection point [kg/kg]

flow MassFlowRate 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]

ExtraProperty C[Medium.nC] properties c_i/m in the connection point

flow ExtraPropertyFlowRate 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]

Type	Name	Description
AbsolutePressure	p	Pressure in the connection point [Pa]
flow MassFlowRate	m_flow	Mass flow rate from the connection point into the component [kg/s]
SpecificEnthalpy	h	Specific mixture enthalpy in the connection point [J/kg]
flow EnthalpyFlowRate	H_flow	Enthalpy flow rate into the component (if m_flow > 0, H_flow = m_flow*h) [W]
MassFraction	Xi[Medium.nXi]	Independent mixture mass fractions m_i/m in the connection point [kg/kg]
flow MassFlowRate	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]
ExtraProperty	C[Medium.nC]	properties c_i/m in the connection point
flow ExtraPropertyFlowRate	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 definition

connector FluidPort 
  "Interface for quasi one-dimensional fluid flow in a piping network (incompressible or compressible, one or more phases, one or more substances)"

  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium 
    "Medium model";

  Medium.AbsolutePressure p "Pressure in the connection point";
  flow Medium.MassFlowRate m_flow 
    "Mass flow rate from the connection point into the component";

  Medium.SpecificEnthalpy h "Specific mixture enthalpy in the connection point";
  flow Medium.EnthalpyFlowRate H_flow 
    "Enthalpy flow rate into the component (if m_flow > 0, H_flow = m_flow*h)";

  Medium.MassFraction Xi[Medium.nXi] 
    "Independent mixture mass fractions m_i/m in the connection point";
  flow Medium.MassFlowRate 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)";

  Medium.ExtraProperty C[Medium.nC] "properties c_i/m in the connection point";
  flow Medium.ExtraPropertyFlowRate 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)";

end FluidPort;

Modelica.Media.Examples.Tests.Components.FluidPort_a

Fluid connector with filled icon

Modelica.Media.Examples.Tests.Components.FluidPort_a

Information

Modelica.Media.Examples.Tests.Components.FluidPort_a

Extends from FluidPort (Interface for quasi one-dimensional fluid flow in a piping network (incompressible or compressible, one or more phases, one or more substances)).

Parameters

Type Name Default Description

replaceable package Medium PartialMedium Medium model

Type	Name	Default	Description
replaceable package Medium	PartialMedium	Medium model

Type	Name	Description
AbsolutePressure	p	Pressure in the connection point [Pa]
flow MassFlowRate	m_flow	Mass flow rate from the connection point into the component [kg/s]
SpecificEnthalpy	h	Specific mixture enthalpy in the connection point [J/kg]
flow EnthalpyFlowRate	H_flow	Enthalpy flow rate into the component (if m_flow > 0, H_flow = m_flow*h) [W]
MassFraction	Xi[Medium.nXi]	Independent mixture mass fractions m_i/m in the connection point [kg/kg]
flow MassFlowRate	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]
ExtraProperty	C[Medium.nC]	properties c_i/m in the connection point
flow ExtraPropertyFlowRate	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 definition

connector FluidPort_a "Fluid connector with filled icon"
  extends FluidPort;
end FluidPort_a;

Modelica.Media.Examples.Tests.Components.FluidPort_b

Fluid connector with outlined icon

Modelica.Media.Examples.Tests.Components.FluidPort_b

Information

Extends from FluidPort (Interface for quasi one-dimensional fluid flow in a piping network (incompressible or compressible, one or more phases, one or more substances)).

Parameters

Type Name Default Description

replaceable package Medium PartialMedium Medium model

Type	Name	Default	Description
replaceable package Medium	PartialMedium	Medium model

Type	Name	Description
AbsolutePressure	p	Pressure in the connection point [Pa]
flow MassFlowRate	m_flow	Mass flow rate from the connection point into the component [kg/s]
SpecificEnthalpy	h	Specific mixture enthalpy in the connection point [J/kg]
flow EnthalpyFlowRate	H_flow	Enthalpy flow rate into the component (if m_flow > 0, H_flow = m_flow*h) [W]
MassFraction	Xi[Medium.nXi]	Independent mixture mass fractions m_i/m in the connection point [kg/kg]
flow MassFlowRate	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]
ExtraProperty	C[Medium.nC]	properties c_i/m in the connection point
flow ExtraPropertyFlowRate	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 definition

connector FluidPort_b "Fluid connector with outlined icon"
  extends FluidPort;
end FluidPort_b;

Modelica.Media.Examples.Tests.Components.PortVolume

Fixed volume associated with a port by the finite volume method

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

Type Name Default Description

Volume V 1e-6 Fixed size of junction volume [m3]

Initial pressure or initial density

Boolean use_p_start true select p_start or d_start

AbsolutePressure p_start 101325 Initial pressure [Pa]

Density d_start 1 Initial density [kg/m3]

Initial temperature or initial specific enthalpy

Boolean use_T_start true select T_start or h_start

Temperature T_start Modelica.SIunits.Conversions... Initial temperature [K]

SpecificEnthalpy h_start 1.e4 Initial specific enthalpy [J/kg]

Only for multi-substance flow

MassFraction X_start[Medium.nX] Initial mass fractions m_i/m [kg/kg]

Type	Name	Default	Description
Volume	V	1e-6	Fixed size of junction volume [m3]
Initial pressure or initial density
Boolean	use_p_start	true	select p_start or d_start
AbsolutePressure	p_start	101325	Initial pressure [Pa]
Density	d_start	1	Initial density [kg/m3]
Initial temperature or initial specific enthalpy
Boolean	use_T_start	true	select T_start or h_start
Temperature	T_start	Modelica.SIunits.Conversions...	Initial temperature [K]
SpecificEnthalpy	h_start	1.e4	Initial specific enthalpy [J/kg]
Only for multi-substance flow
MassFraction	X_start[Medium.nX]		Initial mass fractions m_i/m [kg/kg]

Connectors

Type Name Description

FluidPort_a port

Type	Name	Description
FluidPort_a	port

Modelica definition

model PortVolume 
  "Fixed volume associated with a port by the finite volume method"
  import SI = Modelica.SIunits;

  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium 
    "Medium model";

  parameter SI.Volume V=1e-6 "Fixed size of junction volume";

  parameter Boolean use_p_start=true "select p_start or d_start";
  parameter Medium.AbsolutePressure p_start = 101325 "Initial pressure";
  parameter Medium.Density d_start=1 "Initial density";
  parameter Boolean use_T_start=true "select T_start or h_start";
  parameter Medium.Temperature T_start = Modelica.SIunits.Conversions.from_degC(20) 
    "Initial temperature";
  parameter Medium.SpecificEnthalpy h_start = 1.e4 "Initial specific enthalpy";
  parameter Medium.MassFraction X_start[Medium.nX] 
    "Initial mass fractions m_i/m";

  FluidPort_a port(redeclare package Medium = Medium);
  Medium.BaseProperties medium(preferredMediumStates=true);
  SI.Energy U "Internal energy of port volume";
  SI.Mass m "Mass of junction volume";
  SI.Mass mXi[Medium.nXi] "Independent substance masses of junction volume";

initial equation 
  if not Medium.singleState then
    if use_p_start then
       medium.p = p_start;
    else
       medium.d = d_start;
    end if;
  end if;

  if use_T_start then
     medium.T = T_start;
  else
     medium.h = h_start;
  end if;

  medium.Xi = X_start[1:Medium.nXi];
equation 
  // Connect port to medium variables
     medium.p = port.p;
     medium.h = port.h;
     medium.Xi = port.Xi;

  // Total quantities
     m    = V*medium.d;
     mXi = m*medium.Xi;
     U    = m*medium.u;

  // Mass and energy balance
     der(m)    = port.m_flow;
     der(mXi) = port.mXi_flow;
     der(U)    = port.H_flow;
end PortVolume;

Modelica.Media.Examples.Tests.Components.FixedMassFlowRate

Ideal pump that produces a constant mass flow rate from a large reservoir at fixed temperature and mass fraction

Modelica.Media.Examples.Tests.Components.FixedMassFlowRate

Information

Parameters

Type Name Default Description

MassFlowRate m_flow Fixed mass flow rate from an infinite reservoir to the fluid port [kg/s]

MassFraction X_ambient[Medium.nX] Ambient mass fractions m_i/m of reservoir [kg/kg]

Ambient temperature or ambient specific enthalpy

Boolean use_T_ambient true select T_ambient or h_ambient

Temperature T_ambient Modelica.SIunits.Conversions... Ambient temperature [K]

SpecificEnthalpy h_ambient 1.e4 Ambient specific enthalpy [J/kg]

Type	Name	Default	Description
MassFlowRate	m_flow		Fixed mass flow rate from an infinite reservoir to the fluid port [kg/s]
MassFraction	X_ambient[Medium.nX]		Ambient mass fractions m_i/m of reservoir [kg/kg]
Ambient temperature or ambient specific enthalpy
Boolean	use_T_ambient	true	select T_ambient or h_ambient
Temperature	T_ambient	Modelica.SIunits.Conversions...	Ambient temperature [K]
SpecificEnthalpy	h_ambient	1.e4	Ambient specific enthalpy [J/kg]

Connectors

Type Name Description

FluidPort_b port

Type	Name	Description
FluidPort_b	port

Modelica definition

model FixedMassFlowRate 
  "Ideal pump that produces a constant mass flow rate from a large reservoir at fixed temperature and mass fraction"

  parameter Medium.MassFlowRate m_flow 
    "Fixed mass flow rate from an infinite reservoir to the fluid port";

  parameter Boolean use_T_ambient=true "select T_ambient or h_ambient";
  parameter Medium.Temperature T_ambient=
      Modelica.SIunits.Conversions.from_degC(20) "Ambient temperature";
  parameter Medium.SpecificEnthalpy h_ambient=
      1.e4 "Ambient specific enthalpy";
  parameter Medium.MassFraction X_ambient[Medium.nX] 
    "Ambient mass fractions m_i/m of reservoir";

  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium 
    "Medium model";

  Medium.BaseProperties medium "Medium in the source";
  FluidPort_b port(redeclare package Medium = Medium);
equation 
   if use_T_ambient then
     medium.T = T_ambient;
   else
     medium.h = h_ambient;
   end if;

   medium.Xi     = X_ambient[1:Medium.nXi];
   medium.p      = port.p;
   port.m_flow   = -m_flow;
   port.mXi_flow = semiLinear(port.m_flow, port.Xi, medium.Xi);
   port.H_flow   = semiLinear(port.m_flow, port.h, medium.h);
end FixedMassFlowRate;

Modelica.Media.Examples.Tests.Components.FixedAmbient

Ambient pressure, temperature and mass fraction source

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

Type Name Default Description

Ambient pressure or ambient density

Boolean use_p_ambient true select p_ambient or d_ambient

AbsolutePressure p_ambient 101325 Ambient pressure [Pa]

Density d_ambient 1 Ambient density [kg/m3]

Ambient temperature or ambient specific enthalpy

Boolean use_T_ambient true select T_ambient or h_ambient

Temperature T_ambient Modelica.SIunits.Conversions... Ambient temperature [K]

SpecificEnthalpy h_ambient 1.e4 Ambient specific enthalpy [J/kg]

Only for multi-substance flow

MassFraction X_ambient[Medium.nX] Ambient mass fractions m_i/m [kg/kg]

Type	Name	Default	Description
Ambient pressure or ambient density
Boolean	use_p_ambient	true	select p_ambient or d_ambient
AbsolutePressure	p_ambient	101325	Ambient pressure [Pa]
Density	d_ambient	1	Ambient density [kg/m3]
Ambient temperature or ambient specific enthalpy
Boolean	use_T_ambient	true	select T_ambient or h_ambient
Temperature	T_ambient	Modelica.SIunits.Conversions...	Ambient temperature [K]
SpecificEnthalpy	h_ambient	1.e4	Ambient specific enthalpy [J/kg]
Only for multi-substance flow
MassFraction	X_ambient[Medium.nX]		Ambient mass fractions m_i/m [kg/kg]

Connectors

Type Name Description

FluidPort_b port

Type	Name	Description
FluidPort_b	port

Modelica definition

model FixedAmbient 
  "Ambient pressure, temperature and mass fraction source"
  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium 
    "Medium model";

  parameter Boolean use_p_ambient=true "select p_ambient or d_ambient";
  parameter Medium.AbsolutePressure p_ambient= 101325 "Ambient pressure";
  parameter Medium.Density d_ambient=1 "Ambient density";
  parameter Boolean use_T_ambient=true "select T_ambient or h_ambient";
  parameter Medium.Temperature T_ambient=
      Modelica.SIunits.Conversions.from_degC(20) "Ambient temperature";
  parameter Medium.SpecificEnthalpy h_ambient=
      1.e4 "Ambient specific enthalpy";
  parameter Medium.MassFraction X_ambient[Medium.nX] 
    "Ambient mass fractions m_i/m";

  Medium.BaseProperties medium "Medium in the source";
  FluidPort_b port(redeclare package Medium = Medium);

equation 
  if use_p_ambient or Medium.singleState then
    medium.p = p_ambient;
  else
    medium.d = d_ambient;
  end if;

  if use_T_ambient then
    medium.T = T_ambient;
  else
    medium.h = h_ambient;
  end if;

  medium.Xi = X_ambient[1:Medium.nXi];

  port.p = medium.p;
  port.H_flow   = semiLinear(port.m_flow, port.h, medium.h);
  port.mXi_flow = semiLinear(port.m_flow, port.Xi, medium.Xi);
end FixedAmbient;

Modelica.Media.Examples.Tests.Components.ShortPipe

Simple pressure loss in pipe

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

Type Name Default Description

AbsolutePressure dp_nominal Nominal pressure drop [Pa]

MassFlowRate m_flow_nominal Nominal mass flow rate at nominal pressure drop [kg/s]

Type	Name	Default	Description
AbsolutePressure	dp_nominal		Nominal pressure drop [Pa]
MassFlowRate	m_flow_nominal		Nominal mass flow rate at nominal pressure drop [kg/s]

Connectors

Type Name Description

FluidPort_a port_a

FluidPort_b port_b

Type	Name	Description
FluidPort_a	port_a
FluidPort_b	port_b

Modelica definition

model ShortPipe "Simple pressure loss in pipe"
   replaceable package Medium = Modelica.Media.Interfaces.PartialMedium 
    "Medium model";

  parameter Medium.AbsolutePressure dp_nominal(min=1.e-10) 
    "Nominal pressure drop";
  parameter Medium.MassFlowRate m_flow_nominal(min=1.e-10) 
    "Nominal mass flow rate at nominal pressure drop";

  FluidPort_a port_a(redeclare package Medium = Medium);
  FluidPort_b port_b(redeclare package Medium = Medium);
  // Medium.BaseProperties medium_a(p=port_a.p, h=port_a.h, Xi=port_a.Xi)
  //   "Medium properties in port_a";
  // Medium.BaseProperties medium_b(p=port_b.p, h=port_b.h, Xi=port_b.Xi)
  //   "Medium properties in port_b";
  Medium.MassFlowRate m_flow 
    "Mass flow rate from port_a to port_b (m_flow > 0 is design flow direction)";
  Modelica.SIunits.Pressure dp "Pressure drop from port_a to port_b";
equation 
  /* Handle reverse and zero flow */
  port_a.H_flow   = semiLinear(port_a.m_flow, port_a.h,   port_b.h);
  port_a.mXi_flow = semiLinear(port_a.m_flow, port_a.Xi, port_b.Xi);

  /* Energy, mass and substance mass balance */
  port_a.H_flow + port_b.H_flow = 0;
  port_a.m_flow + port_b.m_flow = 0;
  port_a.mXi_flow + port_b.mXi_flow = zeros(Medium.nXi);

  // Design direction of mass flow rate
  m_flow = port_a.m_flow;

  // Pressure drop
  dp = port_a.p - port_b.p;
  m_flow = (m_flow_nominal/dp_nominal)*dp;
end ShortPipe;

Modelica.Media.Examples.Tests.Components.PartialTestModel

Basic test model to test a medium

Modelica.Media.Examples.Tests.Components.PartialTestModel

Information

Extends from Modelica.Icons.Example (Icon for an example model).

Parameters

Type Name Default Description

AbsolutePressure p_start Medium.p_default Initial value of pressure [Pa]

Temperature T_start Medium.T_default Initial value of temperature [K]

SpecificEnthalpy h_start Medium.h_default Initial value of specific enthalpy [J/kg]

Real X_start[Medium.nX] Medium.X_default Initial value of mass fractions

Type	Name	Default	Description
AbsolutePressure	p_start	Medium.p_default	Initial value of pressure [Pa]
Temperature	T_start	Medium.T_default	Initial value of temperature [K]
SpecificEnthalpy	h_start	Medium.h_default	Initial value of specific enthalpy [J/kg]
Real	X_start[Medium.nX]	Medium.X_default	Initial value of mass fractions

Modelica definition

partial model PartialTestModel "Basic test model to test a medium"
  import SI = Modelica.SIunits;
  extends Modelica.Icons.Example;

  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium 
    "Medium model";
  parameter SI.AbsolutePressure p_start = Medium.p_default 
    "Initial value of pressure";
  parameter SI.Temperature T_start = Medium.T_default 
    "Initial value of temperature";
  parameter SI.SpecificEnthalpy h_start = Medium.h_default 
    "Initial value of specific enthalpy";
  parameter Real X_start[Medium.nX] = Medium.X_default 
    "Initial value of mass fractions";

/*
  parameter SI.AbsolutePressure p_start = 1.0e5 "Initial value of pressure";
  parameter SI.Temperature T_start = 300 "Initial value of temperature";
  parameter SI.Density h_start = 1 "Initial value of specific enthalpy";
  parameter Real X_start[Medium.nX] = Medium.reference_X
    "Initial value of mass fractions";
*/
  PortVolume volume(redeclare package Medium = Medium,
                    p_start=p_start,
                    T_start=T_start,
                    h_start=h_start,
                    X_start = X_start,
                    V=0.1);
  FixedMassFlowRate fixedMassFlowRate(redeclare package Medium = Medium,
    T_ambient=1.2*T_start,
    h_ambient=1.2*h_start,
    m_flow=1,
    X_ambient=0.5*X_start);
  FixedAmbient ambient(
    redeclare package Medium = Medium,
    T_ambient=T_start,
    h_ambient=h_start,
    X_ambient=X_start,
    p_ambient=p_start);
  ShortPipe shortPipe(redeclare package Medium = Medium,
    m_flow_nominal=1,
    dp_nominal=0.1e5);
equation 
  connect(fixedMassFlowRate.port, volume.port);
  connect(volume.port, shortPipe.port_a);
  connect(shortPipe.port_b, ambient.port);
end PartialTestModel;

Modelica.Media.Examples.Tests.Components.PartialTestModel2

slightly larger test model to test a medium

Modelica.Media.Examples.Tests.Components.PartialTestModel2

Information

Extends from Modelica.Icons.Example (Icon for an example model).

Parameters

Type Name Default Description

AbsolutePressure p_start 1.0e5 Initial value of pressure [Pa]

Temperature T_start 300 Initial value of temperature [K]

SpecificEnthalpy h_start 1 Initial value of specific enthalpy [J/kg]

Real X_start[Medium.nX] Medium.reference_X Initial value of mass fractions

Type	Name	Default	Description
AbsolutePressure	p_start	1.0e5	Initial value of pressure [Pa]
Temperature	T_start	300	Initial value of temperature [K]
SpecificEnthalpy	h_start	1	Initial value of specific enthalpy [J/kg]
Real	X_start[Medium.nX]	Medium.reference_X	Initial value of mass fractions

Modelica definition

partial model PartialTestModel2 
  "slightly larger test model to test a medium"
  import SI = Modelica.SIunits;
  extends Modelica.Icons.Example;

  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium 
    "Medium model";
  parameter SI.AbsolutePressure p_start = 1.0e5 "Initial value of pressure";
  parameter SI.Temperature T_start = 300 "Initial value of temperature";
  parameter SI.SpecificEnthalpy h_start = 1 
    "Initial value of specific enthalpy";
  parameter Real X_start[Medium.nX] = Medium.reference_X 
    "Initial value of mass fractions";
  PortVolume volume(redeclare package Medium = Medium,
                    p_start=p_start,
                    T_start=T_start,
                    h_start=h_start,
                    X_start = X_start,
                    V=0.1);
  FixedMassFlowRate fixedMassFlowRate(redeclare package Medium = Medium,
    T_ambient=1.2*T_start,
    h_ambient=1.2*h_start,
    m_flow=1,
    X_ambient=0.5*X_start);
  FixedAmbient ambient(
    redeclare package Medium = Medium,
    T_ambient=T_start,
    h_ambient=h_start,
    X_ambient=X_start,
    p_ambient=p_start);
  ShortPipe shortPipe(redeclare package Medium = Medium,
    m_flow_nominal=1,
    dp_nominal=0.1e5);
  PortVolume volume1(
                    redeclare package Medium = Medium,
                    p_start=p_start,
                    T_start=T_start,
                    h_start=h_start,
                    X_start = X_start,
                    V=0.1);
  ShortPipe shortPipe1(
                      redeclare package Medium = Medium,
    m_flow_nominal=1,
    dp_nominal=0.1e5);
equation 
  connect(fixedMassFlowRate.port, volume.port);
  connect(volume.port, shortPipe.port_a);
  connect(volume1.port, shortPipe1.port_a);
  connect(shortPipe.port_b, volume1.port);
  connect(shortPipe1.port_b, ambient.port);
end PartialTestModel2;

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Modelica.Media.Examples.Tests.Components

Information

Package Content

Modelica.Media.Examples.Tests.Components.FluidPort

Information

Contents

Modelica definition

Modelica.Media.Examples.Tests.Components.FluidPort_a

Information

Parameters

Contents

Modelica definition

Modelica.Media.Examples.Tests.Components.FluidPort_b

Information

Parameters

Contents

Modelica definition

Modelica.Media.Examples.Tests.Components.PortVolume

Information

Parameters

Connectors

Modelica definition

Modelica.Media.Examples.Tests.Components.FixedMassFlowRate

Information

Parameters

Connectors

Modelica definition

Modelica.Media.Examples.Tests.Components.FixedAmbient

Information

Parameters

Connectors

Modelica definition

Modelica.Media.Examples.Tests.Components.ShortPipe

Information

Parameters

Connectors

Modelica definition

Modelica.Media.Examples.Tests.Components.PartialTestModel

Information

Parameters

Modelica definition

Modelica.Media.Examples.Tests.Components.PartialTestModel2

Information

Parameters

Modelica definition