Buildings.Fluid.Sensors.Examples

Collection of models that illustrate model use and test models

Information

This package contains examples for the use of models that can be found in Buildings.Fluid.Sensors.

Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).

Package Content

Name Description

EnthalpyFlowRate Test model for enthalpy flow rate

ExtraProperty

TemperatureDryBulb

TemperatureWetBulb

MassFraction

MoistAirEnthalpyFlowRate Test model for sensible and latent enthalpy flow rate

RelativeHumidity Test model for relative humidity sensor

Name	Description
EnthalpyFlowRate	Test model for enthalpy flow rate
ExtraProperty
TemperatureDryBulb
TemperatureWetBulb
MassFraction
MoistAirEnthalpyFlowRate	Test model for sensible and latent enthalpy flow rate
RelativeHumidity	Test model for relative humidity sensor

Buildings.Fluid.Sensors.Examples.EnthalpyFlowRate

Test model for enthalpy flow rate

Buildings.Fluid.Sensors.Examples.EnthalpyFlowRate

Information

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica definition

model EnthalpyFlowRate "Test model for enthalpy flow rate"
  extends Modelica.Icons.Example;
  import Buildings;

  package Medium = Buildings.Media.IdealGases.SimpleAir;
  Buildings.Fluid.Sensors.EnthalpyFlowRate senH_flow(redeclare package Medium
      = Medium, m_flow_nominal=2) "Sensor for enthalpy flow rate";
  Buildings.Fluid.Sources.MassFlowSource_h sou(
    use_m_flow_in=true,
    use_h_in=true,
    redeclare package Medium = Medium,
    nPorts=1);
  Buildings.Fluid.Sources.Boundary_ph sin(use_h_in=true, redeclare package
      Medium = Medium,
    nPorts=1);
  Modelica.Blocks.Sources.Ramp ramp(
    duration=1,
    height=-2,
    offset=1);
  Modelica.Blocks.Sources.Constant const(k=10);
  Modelica.Blocks.Sources.Constant const1(k=20);
  inner Modelica.Fluid.System system;
  Buildings.Fluid.Sensors.SpecificEnthalpyTwoPort senH(redeclare package Medium
      = Medium, m_flow_nominal=2);
  Buildings.Fluid.Sensors.MassFlowRate senM_flow(redeclare package Medium =
        Medium);
  Buildings.Utilities.Diagnostics.AssertEquality assertEquality;
  Modelica.Blocks.Math.Product product;
equation 
  connect(ramp.y, sou.m_flow_in);
  connect(const.y, sou.h_in);
  connect(const1.y, sin.h_in);
  connect(sou.ports[1], senH_flow.port_a);
  connect(senH_flow.port_b, senH.port_a);
  connect(senH.port_b, senM_flow.port_a);
  connect(senM_flow.port_b, sin.ports[1]);
  connect(senH_flow.H_flow, assertEquality.u1);
  connect(senH.h_out, product.u1);
  connect(senM_flow.m_flow, product.u2);
  connect(product.y, assertEquality.u2);
end EnthalpyFlowRate;

Buildings.Fluid.Sensors.Examples.ExtraProperty

Information

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica definition

model ExtraProperty
  extends Modelica.Icons.Example;
  import Buildings;
 package Medium = Buildings.Media.GasesPTDecoupled.SimpleAir(extraPropertiesNames={"CO2"});

  MixingVolumes.MixingVolume vol(
    redeclare package Medium = Medium,
    V=2*3*3,
    nPorts=4) "Mixing volume";
  inner Modelica.Fluid.System system;
  Sources.PrescribedExtraPropertyFlowRate sou(redeclare package Medium = Medium,
    nPorts=3,
    use_m_flow_in=true);
  Modelica.Blocks.Sources.Constant step(k=8.18E-6);
  Buildings.Fluid.Sensors.TraceSubstances senVol(
                    redeclare package Medium = Medium) "Sensor at volume";
  Buildings.Fluid.Sensors.TraceSubstances senSou(
                    redeclare package Medium = Medium, substanceName="CO2") 
    "Sensor at source";
  Modelica.Blocks.Sources.Constant m_flow(k=15*1.2/3600) "Fresh air flow rate";
  Buildings.Fluid.Sources.MassFlowSource_T mSou(
                                          redeclare package Medium = Medium,
    use_m_flow_in=true,
    nPorts=2);
  Modelica.Blocks.Math.Gain gain(k=-1);
  Buildings.Fluid.Sources.MassFlowSource_T mSin(
                                          redeclare package Medium = Medium,
    use_m_flow_in=true,
    nPorts=2);
  Buildings.Fluid.Sensors.Conversions.To_VolumeFraction masFraSou(
                                                   MMMea=Modelica.Media.
        IdealGases.Common.SingleGasesData.CO2.MM);
  Buildings.Fluid.Sensors.Conversions.To_VolumeFraction masFraVol(
                                                   MMMea=Modelica.Media.
        IdealGases.Common.SingleGasesData.CO2.MM);
  Buildings.Fluid.Sensors.RelativePressure dp(
                      redeclare package Medium = Medium);
  Buildings.Utilities.Diagnostics.AssertEquality assertEquality(startTime=0,
      threShold=1E-8);
  Modelica.Blocks.Sources.Constant zer(k=0) "Zero signal";
  Buildings.Fluid.Sensors.Pressure preSen(  redeclare package Medium = Medium) 
    "Pressure sensor";
equation 
  connect(m_flow.y, mSou.m_flow_in);
  connect(m_flow.y, gain.u);
  connect(gain.y, mSin.m_flow_in);
  connect(senSou.C, masFraSou.m);
  connect(senVol.C, masFraVol.m);
  connect(dp.p_rel, assertEquality.u1);
  connect(zer.y, assertEquality.u2);
  connect(mSou.ports[1], dp.port_a);
  connect(mSin.ports[1], dp.port_b);
  connect(mSou.ports[2], vol.ports[1]);
  connect(mSin.ports[2], vol.ports[2]);
  connect(vol.ports[4], senVol.port);
  connect(sou.ports[1], vol.ports[3]);
  connect(sou.ports[2], preSen.port);
  connect(sou.ports[3], senSou.port);
  connect(step.y, sou.m_flow_in);
end ExtraProperty;

Buildings.Fluid.Sensors.Examples.TemperatureDryBulb

Information

This examples is a unit test for the dynamic dry bulb temperature sensor.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica definition

model TemperatureDryBulb
  extends Modelica.Icons.Example;

// package Medium =  annotation 1;
 package Medium = Buildings.Media.PerfectGases.MoistAir "Medium model";
  Buildings.Fluid.Sources.Boundary_pT sin(
    redeclare package Medium = Medium,
    nPorts=1,
    T=293.15);
  Buildings.Fluid.Sources.MassFlowSource_T masFloRat(
    redeclare package Medium = Medium,
    use_T_in=true,
    use_m_flow_in=true,
    nPorts=1);
    Modelica.Blocks.Sources.Ramp TDryBul(
    height=10,
    duration=1,
    offset=273.15 + 30) "Dry bulb temperature";
    Modelica.Blocks.Sources.Ramp XHum(
    height=(0.0133 - 0.0175),
    offset=0.0175,
    duration=60) "Humidity concentration";
  Modelica.Blocks.Sources.Constant const;
  Modelica.Blocks.Math.Feedback feedback;
  Buildings.Utilities.Diagnostics.AssertEquality assertEquality(
      threShold=0.001, startTime=0);
  Modelica.Blocks.Continuous.FirstOrder firOrd(T=10,
    initType=Modelica.Blocks.Types.Init.InitialState,
    y_start=293.15);
  Buildings.Fluid.Sensors.TemperatureTwoPort temSteSta(
                                               redeclare package Medium =
        Medium, m_flow_nominal=2) "Steady state temperature sensor";
  inner Modelica.Fluid.System system;
    Modelica.Blocks.Sources.Pulse m_flow(
    offset=-1,
    amplitude=2,
    period=30) "Mass flow rate";
  Buildings.Fluid.Sensors.TemperatureDynamicTwoPort temDyn(
    redeclare package Medium = Medium,
    initType=Modelica.Blocks.Types.Init.InitialState,
    T_start=293.15,
    m_flow_nominal=2);
equation 
  connect(TDryBul.y, masFloRat.T_in);
  connect(const.y, feedback.u1);
  connect(XHum.y, feedback.u2);
  connect(XHum.y, masFloRat.X_in[1]);
  connect(feedback.y, masFloRat.X_in[2]);
  connect(temSteSta.T, firOrd.u);
  connect(masFloRat.ports[1], temSteSta.port_a);
  connect(firOrd.y, assertEquality.u1);
  connect(m_flow.y, masFloRat.m_flow_in);
  connect(temSteSta.port_b, temDyn.port_a);
  connect(temDyn.port_b, sin.ports[1]);
  connect(temDyn.T, assertEquality.u2);
end TemperatureDryBulb;

Buildings.Fluid.Sensors.Examples.TemperatureWetBulb

Information

This examples is a unit test for the wet bulb sensor. The problem setup is such that the moisture concentration and the dry bulb temperature are varied simultaneously in such a way that the wet bulb temperature is constant. This wet bulb temperature is checked against a constant value with an assert statement. In case this assert is triggered, then either the wet bulb sensor or the medium model got broken (assuming that the inputs remained unchanged).

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica definition

model TemperatureWetBulb
  extends Modelica.Icons.Example;
  import Buildings;

 package Medium = Buildings.Media.PerfectGases.MoistAir "Medium model";

    Modelica.Blocks.Sources.Ramp p(
    duration=1,
    offset=101325,
    height=250);
  Buildings.Fluid.Sources.Boundary_pT sin(             redeclare package Medium
      = Medium,
    use_p_in=true,
    nPorts=1,
    T=293.15);
  Buildings.Fluid.Sensors.TemperatureWetBulbTwoPort senWetBul(redeclare package
      Medium = Medium, m_flow_nominal=10) "Wet bulb temperature sensor";
  Buildings.Fluid.Sources.MassFlowSource_T massFlowRate(            redeclare 
      package Medium = Medium, m_flow=1,
    use_T_in=true,
    use_X_in=true,
    nPorts=1);
    Modelica.Blocks.Sources.Ramp TDryBul(
    height=10,
    duration=1,
    offset=273.15 + 30) "Dry bulb temperature";
    Modelica.Blocks.Sources.Ramp XHum(
    duration=1,
    height=(0.0133 - 0.0175),
    offset=0.0175) "Humidity concentration";
  Modelica.Blocks.Sources.Constant const(k=1);
  Modelica.Blocks.Math.Feedback feedback;
  Buildings.Utilities.Diagnostics.AssertEquality assertEquality(threShold=0.05);
  Modelica.Blocks.Sources.Constant TWetBulExp(k=273.15 + 25) 
    "Expected wet bulb temperature";
  inner Modelica.Fluid.System system;
  Buildings.Fluid.Sensors.MassFraction masFra(
                      redeclare package Medium = Medium) "Mass fraction";
equation 
  connect(TDryBul.y, massFlowRate.T_in);
  connect(const.y, feedback.u1);
  connect(XHum.y, feedback.u2);
  connect(XHum.y, massFlowRate.X_in[1]);
  connect(feedback.y, massFlowRate.X_in[2]);
  connect(p.y, sin.p_in);
  connect(massFlowRate.ports[1], senWetBul.port_a);
  connect(senWetBul.port_b, sin.ports[1]);
  connect(TWetBulExp.y, assertEquality.u1);
  connect(senWetBul.T, assertEquality.u2);
  connect(senWetBul.port_a, masFra.port);
end TemperatureWetBulb;

Buildings.Fluid.Sensors.Examples.MassFraction

Information

This examples is a unit test for the mass fraction sensor.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica definition

model MassFraction
  extends Modelica.Icons.Example;
  import Buildings;

  package Medium = Buildings.Media.PerfectGases.MoistAirUnsaturated 
    "Medium model";

  Buildings.Fluid.Sources.Boundary_pT sin(             redeclare package Medium
      = Medium,
    T=293.15,
    nPorts=1);
  Buildings.Fluid.Sources.MassFlowSource_T masFloRat(
    redeclare package Medium = Medium,
    use_m_flow_in=false,
    use_T_in=false,
    X={0.02,0.98},
    m_flow=10,
    nPorts=1);
  inner Modelica.Fluid.System system;
  Buildings.Fluid.Sensors.MassFraction senMasFra2(redeclare package Medium =
        Medium) "Mass fraction";
  Buildings.Fluid.MixingVolumes.MixingVolume vol(
    redeclare package Medium = Medium,
    V=1,
    nPorts=3) "Volume";
  Buildings.Fluid.FixedResistances.FixedResistanceDpM dp(
    redeclare package Medium = Medium,
    m_flow_nominal=10,
    dp_nominal=200);
  Buildings.Fluid.Sensors.MassFractionTwoPort senMasFra1(redeclare package
      Medium = Medium, m_flow_nominal=10);
equation 
  connect(dp.port_b, sin.ports[1]);
  connect(masFloRat.ports[1], senMasFra1.port_a);
  connect(senMasFra1.port_b, vol.ports[1]);
  connect(vol.ports[2], dp.port_a);
  connect(vol.ports[3], senMasFra2.port);
end MassFraction;

Buildings.Fluid.Sensors.Examples.MoistAirEnthalpyFlowRate

Test model for sensible and latent enthalpy flow rate

Buildings.Fluid.Sensors.Examples.MoistAirEnthalpyFlowRate

Information

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica definition

model MoistAirEnthalpyFlowRate 
  "Test model for sensible and latent enthalpy flow rate"
  extends Modelica.Icons.Example;
  import Buildings;

  package Medium = Buildings.Media.PerfectGases.MoistAir;
  Buildings.Fluid.Sensors.EnthalpyFlowRate senH_flow(redeclare package Medium
      = Medium, m_flow_nominal=1) "Sensor for enthalpy flow rate";
  Buildings.Fluid.Sources.MassFlowSource_T sou(
    use_m_flow_in=true,
    redeclare package Medium = Medium,
    nPorts=1,
    X=Medium.X_default,
    T=293.15);
  Buildings.Fluid.Sources.Boundary_pT sin(               redeclare package
      Medium = Medium,
    nPorts=1,
    T=313.15,
    X={0.02,0.98});
  Modelica.Blocks.Sources.Ramp ramp(
    duration=1,
    height=-2,
    offset=1);
  inner Modelica.Fluid.System system;
  Buildings.Fluid.Sensors.SpecificEnthalpyTwoPort senH(redeclare package Medium
      = Medium, m_flow_nominal=1);
  Buildings.Fluid.Sensors.MassFlowRate senM_flow(redeclare package Medium =
        Medium);
  Buildings.Utilities.Diagnostics.AssertEquality assEqu1;
  Modelica.Blocks.Math.Product product;
  Buildings.Fluid.Sensors.LatentEnthalpyFlowRate senHLat_flow(redeclare package
      Medium =         Medium, m_flow_nominal=1) 
    "Sensor for latent enthalpy flow rate";
  Buildings.Fluid.Sensors.SensibleEnthalpyFlowRate senHSen_flow(redeclare 
      package Medium = Medium, m_flow_nominal=1) 
    "Sensor for sensible enthalpy flow rate";
  Modelica.Blocks.Math.Add add1;
  Buildings.Utilities.Diagnostics.AssertEquality assEqu2;
equation 
  connect(ramp.y, sou.m_flow_in);
  connect(sou.ports[1], senH_flow.port_a);
  connect(senH_flow.port_b, senH.port_a);
  connect(senH.port_b, senM_flow.port_a);
  connect(senH_flow.H_flow, assEqu1.u1);
  connect(senH.h_out, product.u1);
  connect(senM_flow.m_flow, product.u2);
  connect(product.y, assEqu1.u2);
  connect(senHLat_flow.H_flow, add1.u1);
  connect(senHSen_flow.H_flow, add1.u2);
  connect(senM_flow.port_b, senHLat_flow.port_a);
  connect(senHLat_flow.port_b, senHSen_flow.port_a);
  connect(senH_flow.H_flow, assEqu2.u1);
  connect(add1.y, assEqu2.u2);
  connect(senHSen_flow.port_b, sin.ports[1]);
end MoistAirEnthalpyFlowRate;

Buildings.Fluid.Sensors.Examples.RelativeHumidity

Test model for relative humidity sensor

Buildings.Fluid.Sensors.Examples.RelativeHumidity

Information

This examples is a unit test for the relative humidity sensor.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Modelica definition

model RelativeHumidity "Test model for relative humidity sensor"
  extends Modelica.Icons.Example;
  import Buildings;

  package Medium = Buildings.Media.PerfectGases.MoistAir "Medium model";

  Buildings.Fluid.Sources.Boundary_pT sin(             redeclare package Medium
      = Medium,
    use_p_in=false,
    T=293.15,
    nPorts=1);
  Buildings.Fluid.Sources.MassFlowSource_T massFlowRate(            redeclare 
      package Medium = Medium, m_flow=1,
    use_T_in=true,
    use_X_in=true,
    nPorts=2,
    use_m_flow_in=true);
    Modelica.Blocks.Sources.Ramp TDryBul(
    height=10,
    duration=1,
    offset=273.15 + 30) "Dry bulb temperature";
    Modelica.Blocks.Sources.Ramp XHum(
    duration=1,
    height=(0.0133 - 0.0175),
    offset=0.0175) "Humidity concentration";
  Modelica.Blocks.Sources.Constant const(k=1);
  Modelica.Blocks.Math.Feedback feedback;
  inner Modelica.Fluid.System system;
  Buildings.Fluid.FixedResistances.FixedResistanceDpM dp(
    redeclare package Medium = Medium,
    m_flow_nominal=10,
    dp_nominal=200);
  Buildings.Fluid.Sensors.RelativeHumidity senRelHum(redeclare package Medium
      = Medium);
    Modelica.Blocks.Sources.Ramp m_flow(
    duration=1,
    height=-2,
    offset=1) "Mass flow rate";
  Buildings.Fluid.Sensors.RelativeHumidityTwoPort relHum(redeclare package
      Medium = Medium, m_flow_nominal=1);
equation 
  connect(TDryBul.y, massFlowRate.T_in);
  connect(const.y, feedback.u1);
  connect(XHum.y, feedback.u2);
  connect(XHum.y, massFlowRate.X_in[1]);
  connect(feedback.y, massFlowRate.X_in[2]);
  connect(dp.port_a, massFlowRate.ports[1]);
  connect(m_flow.y, massFlowRate.m_flow_in);
  connect(dp.port_b, relHum.port_a);
  connect(relHum.port_b, sin.ports[1]);
  connect(massFlowRate.ports[2], senRelHum.port);
end RelativeHumidity;

Automatically generated Fri May 06 14:12:48 2011.