Buildings.Fluids.Sources

Information

Package Content

Name	Description
Examples	Collection of models that illustrate model use and test models
FixedBoundary_phX	Boundary pressure, specific enthalpy and mass fraction source
FixedBoundary_pTX	Boundary pressure, temperature and mass fraction source
PrescribedBoundary_phX	Prescribed pressure, specific enthalpy and mass fraction source
PrescribedBoundary_pTX	Prescribed pressure, temperature and mass fraction source
PrescribedExtraPropertyFlowRate	Source with mass flow that does not take part in medium mass balance (such as CO2)
PrescribedMassFlowRate_phX	Ideal pump that produces a prescribed mass flow with prescribed specific enthalpy and mass fraction
PrescribedMassFlowRate_pTX	Ideal pump that produces a prescribed mass flow with prescribed temperature and mass fraction

Buildings.Fluids.Sources.FixedBoundary_phX

Information

Parameters

Type	Name	Default	Description
replaceable package Medium		PartialMedium	Medium model within the source
AbsolutePressure	p		Boundary pressure [Pa]
SpecificEnthalpy	h		Boundary specific enthalpy [J/kg]
Only for multi-substance flow
MassFraction	X[Medium.nX]	Medium.X_default	Boundary mass fractions m_i/m [kg/kg]
Advanced
Temp	flowDirection	Types.SourceFlowDirection.Bi...	Uni- or bidirectional flow component

Connectors

Type	Name	Description
FluidPort_b	port

Modelica definition

model FixedBoundary_phX 
  "Boundary pressure, specific enthalpy and mass fraction source" 
  extends Modelica_Fluid.Sources.FixedBoundary_phX;
equation 
 ///////////////////////////////////////////////////////////////////////////////////
 // Extra species flow. This may be removed when upgrading to the new Modelica.Fluid.  
 port.mC_flow = semiLinear(port.m_flow, port.C, 0);
 ///////////////////////////////////////////////////////////////////////////////////
end FixedBoundary_phX;

Buildings.Fluids.Sources.FixedBoundary_pTX

Information

Parameters

Type	Name	Default	Description
replaceable package Medium		PartialMedium	Medium model within the source
AbsolutePressure	p		Boundary pressure [Pa]
Temperature	T		Boundary temperature [K]
Only for multi-substance flow
MassFraction	X[Medium.nX]	Medium.X_default	Boundary mass fractions m_i/m [kg/kg]
Advanced
Temp	flowDirection	Types.SourceFlowDirection.Bi...	Uni- or bidirectional flow component

Connectors

Type	Name	Description
FluidPort_b	port

Modelica definition

model FixedBoundary_pTX 
  "Boundary pressure, temperature and mass fraction source" 
  extends Modelica_Fluid.Sources.FixedBoundary_pTX;
equation 
 ///////////////////////////////////////////////////////////////////////////////////
 // Extra species flow. This may be removed when upgrading to the new Modelica.Fluid.  
 port.mC_flow = semiLinear(port.m_flow, port.C, 0);
 ///////////////////////////////////////////////////////////////////////////////////
end FixedBoundary_pTX;

Buildings.Fluids.Sources.PrescribedBoundary_phX

Information

Parameters

Type	Name	Default	Description
replaceable package Medium		PartialMedium	Medium model within the source
Pressure	p		Fixed value of pressure [Pa]
SpecificEnthalpy	h		Fixed value of specific enthalpy [J/kg]
MassFraction	X[Medium.nX]	Medium.X_default	Fixed value of composition [1]
Advanced
Temp	flowDirection	Types.SourceFlowDirection.Bi...	Uni- or bidirectional flow component

Connectors

Type	Name	Description
FluidPort_b	port
input RealInput	p_in	Prescribed boundary pressure
input RealInput	h_in	Prescribed boundary specific enthalpy
input RealInput	X_in[Medium.nX]	Prescribed boundary composition

Modelica definition

model PrescribedBoundary_phX 
  "Prescribed pressure, specific enthalpy and mass fraction source" 
  extends Modelica_Fluid.Sources.PrescribedBoundary_phX;
equation 
 ///////////////////////////////////////////////////////////////////////////////////
 // Extra species flow. This may be removed when upgrading to the new Modelica.Fluid.  
 port.mC_flow = semiLinear(port.m_flow, port.C, 0);
 ///////////////////////////////////////////////////////////////////////////////////
end PrescribedBoundary_phX;

Buildings.Fluids.Sources.PrescribedBoundary_pTX

Information

Parameters

Type	Name	Default	Description
replaceable package Medium		PartialMedium	Medium model within the source
Pressure	p		Fixed value of pressure [Pa]
Temperature	T		Fixed value of temperature [K]
MassFraction	X[Medium.nX]	Medium.X_default	Fixed value of composition [1]
Advanced
Temp	flowDirection	Types.SourceFlowDirection.Bi...	Uni- or bidirectional flow component

Connectors

Type	Name	Description
FluidPort_b	port
input RealInput	p_in	Prescribed boundary pressure
input RealInput	T_in	Prescribed boundary temperature
input RealInput	X_in[Medium.nX]	Prescribed boundary composition

Modelica definition

model PrescribedBoundary_pTX 
  "Prescribed pressure, temperature and mass fraction source" 
  extends Modelica_Fluid.Sources.PrescribedBoundary_pTX;
equation 
 ///////////////////////////////////////////////////////////////////////////////////
 // Extra species flow. This may be removed when upgrading to the new Modelica.Fluid.  
 port.mC_flow = semiLinear(port.m_flow, port.C, 0);
 ///////////////////////////////////////////////////////////////////////////////////
end PrescribedBoundary_pTX;

Buildings.Fluids.Sources.PrescribedExtraPropertyFlowRate

Information

Parameters

Type	Name	Default	Description
ExtraPropertyFlowRate	mC_flow[Medium.nC]	ones(Medium.nC)	Fixed mass flow rate for extra property going out of the fluid port

Connectors

Type	Name	Description
FluidPort_b	port
input RealInput	mC_flow_in[Medium.nC]	Prescribed mass flow rate for extra property

Modelica definition

model PrescribedExtraPropertyFlowRate 
  "Source with mass flow that does not take part in medium mass balance (such as CO2)" 
  extends Buildings.BaseClasses.BaseIcon;
  replaceable package Medium = 
      Modelica.Media.Interfaces.PartialMedium "Medium model within the source";
  
  Modelica_Fluid.Interfaces.FluidPort_b port(redeclare package Medium = Medium,
      m_flow(min=-Modelica.Constants.inf, max=0));
  
  parameter Medium.ExtraPropertyFlowRate mC_flow[Medium.nC] = ones(Medium.nC) 
    "Fixed mass flow rate for extra property going out of the fluid port";
  Modelica.Blocks.Interfaces.RealInput mC_flow_in[Medium.nC](redeclare type 
      SignalType = 
       Medium.ExtraPropertyFlowRate) 
    "Prescribed mass flow rate for extra property";
equation 
  if cardinality(mC_flow_in)==0 then
    mC_flow_in = mC_flow;
  end if;
  assert(sum(mC_flow_in) >= 0, "Reverse flow for species source is not implemented yet.");
  port.m_flow = -Modelica.Constants.eps;
  port.C = mC_flow_in/Modelica.Constants.eps;
  port.h = Medium.h_default;
end PrescribedExtraPropertyFlowRate;

Buildings.Fluids.Sources.PrescribedMassFlowRate_phX

Information

Parameters

Type	Name	Default	Description
replaceable package Medium		PartialMedium	Medium model within the source
MassFlowRate	m_flow	0	Fixed mass flow rate going out of the fluid port [kg/s]
SpecificEnthalpy	h		Fixed value of the fluid specific enthalpy [J/kg]
MassFraction	X[Medium.nX]	Medium.X_default	Fixed value of the fluid composition [kg/kg]
Advanced
Temp	flowDirection	Types.SourceFlowDirection.Bi...	Uni- or bidirectional flow component

Connectors

Type	Name	Description
FluidPort_b	port
input RealInput	m_flow_in	Prescribed mass flow rate
input RealInput	h_in	Prescribed fluid specific enthalpy
input RealInput	X_in[Medium.nX]	Prescribed fluid composition

Modelica definition

model PrescribedMassFlowRate_phX 
  "Ideal pump that produces a prescribed mass flow with prescribed specific enthalpy and mass fraction" 
  extends Modelica_Fluid.Sources.PrescribedMassFlowRate_hX;
equation 
 ///////////////////////////////////////////////////////////////////////////////////
 // Extra species flow. This may be removed when upgrading to the new Modelica.Fluid.  
 port.mC_flow = semiLinear(port.m_flow, port.C, 0);
 ///////////////////////////////////////////////////////////////////////////////////
end PrescribedMassFlowRate_phX;

Buildings.Fluids.Sources.PrescribedMassFlowRate_pTX

Information

Parameters

Type	Name	Default	Description
replaceable package Medium		PartialMedium	Medium model within the source
MassFlowRate	m_flow	0	Fixed mass flow rate going out of the fluid port [kg/s]
Temperature	T		Fixed value of the fluid temperature [K]
MassFraction	X[Medium.nX]	Medium.X_default	Fixed value of the fluid composition [kg/kg]
Advanced
Temp	flowDirection	Types.SourceFlowDirection.Bi...	Uni- or bidirectional flow component

Connectors

Type	Name	Description
FluidPort_b	port
input RealInput	m_flow_in	Prescribed mass flow rate
input RealInput	T_in	Prescribed fluid temperature
input RealInput	X_in[Medium.nX]	Prescribed fluid composition

Modelica definition

model PrescribedMassFlowRate_pTX 
  "Ideal pump that produces a prescribed mass flow with prescribed temperature and mass fraction" 
  extends Modelica_Fluid.Sources.PrescribedMassFlowRate_TX;
equation 
 ///////////////////////////////////////////////////////////////////////////////////
 // Extra species flow. This may be removed when upgrading to the new Modelica.Fluid.  
 port.mC_flow = semiLinear(port.m_flow, port.C, 0);
 ///////////////////////////////////////////////////////////////////////////////////
end PrescribedMassFlowRate_pTX;