Buildings.Utilities.Psychrometrics.Examples

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Buildings.Utilities.Psychrometrics.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.Utilities.Psychrometrics.

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

Package Content

Name	Description
Density_pTX	Model to test the density computation
DewPointTemperature	Unit test for dew point temperature calculation
HumidityRatioPressure	Unit test for humidity ratio model
MassFraction_pTphi	Unit test for dew point temperature calculation
Phi_pTX	Model to test the relative humidity computation
SaturationPressure	Model to test the wet bulb temperature computation
SaturationPressureLiquid	Model to test the wet bulb temperature computation
SublimationPressureIce	Model to test the wet bulb temperature computation
TWetBul_TDryBulPhi	Model to test the wet bulb temperature computation
TWetBul_TDryBulXi
TotalAirDryAir	Unit test for conversion of humidity per total air and dry air mass
WetBul_pTX	Model to test the wet bulb temperature computation

Buildings.Utilities.Psychrometrics.Examples.Density_pTX

Model to test the density computation

Buildings.Utilities.Psychrometrics.Examples.Density_pTX

Information

This examples is a unit test for the density computation.

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

Modelica definition

model Density_pTX "Model to test the density computation" extends Modelica.Icons.Example; package Medium = Buildings.Media.Air "Medium model"; Modelica.Blocks.Sources.Constant p(k=101325) "Pressure"; Modelica.Blocks.Sources.Ramp XDryBul( height=0.014, offset=0, duration=0.5) "Dry bulb water vapor mass fraction"; Buildings.Utilities.Psychrometrics.Density_pTX den "Density"; Modelica.Blocks.Sources.Ramp TDryBul( duration=0.5, startTime=0.5, height=-10, offset=303.15) "Dry bulb temperature"; equation connect(XDryBul.y, den.X_w); connect(den.p, p.y); connect(TDryBul.y, den.T); end Density_pTX;

Buildings.Utilities.Psychrometrics.Examples.DewPointTemperature

Unit test for dew point temperature calculation

Buildings.Utilities.Psychrometrics.Examples.DewPointTemperature

Information

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

Modelica definition

model DewPointTemperature "Unit test for dew point temperature calculation" extends Modelica.Icons.Example; package Medium = Buildings.Media.Air "Medium model"; Buildings.Utilities.Psychrometrics.pW_TDewPoi watVapPre; Modelica.Blocks.Sources.Ramp XHum( duration=1, height=(0.01 - 0.1), offset=0.1) "Humidity concentration"; Buildings.Utilities.Psychrometrics.pW_X humRat( use_p_in=false); Buildings.Utilities.Psychrometrics.TDewPoi_pW TDewPoi; equation connect(XHum.y, humRat.X_w); connect(humRat.p_w, TDewPoi.p_w); connect(TDewPoi.T, watVapPre.T); end DewPointTemperature;

Buildings.Utilities.Psychrometrics.Examples.HumidityRatioPressure

Unit test for humidity ratio model

Buildings.Utilities.Psychrometrics.Examples.HumidityRatioPressure

Information

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

Modelica definition

model HumidityRatioPressure "Unit test for humidity ratio model" extends Modelica.Icons.Example; package Medium = Buildings.Media.Air "Medium model"; Buildings.Utilities.Psychrometrics.pW_X vapPre( use_p_in=true) "Model for humidity ratio"; Modelica.Blocks.Sources.Ramp XHumDryAir( duration=1, height=(0.0133 - 0.2), offset=0.2) "Humidity concentration in [kg/kg dry air]"; Modelica.Blocks.Sources.Constant p(k=101325) "Pressure"; Buildings.Utilities.Psychrometrics.X_pW humRat( use_p_in=true); Diagnostics.AssertEquality assertEquality(threShold=1E-5) "Checks that model and its inverse implementation are correct"; ToTotalAir toTotalAir; equation connect(vapPre.p_w, humRat.p_w); connect(humRat.X_w, assertEquality.u1); connect(p.y, humRat.p_in); connect(p.y, vapPre.p_in); connect(XHumDryAir.y, toTotalAir.XiDry); connect(toTotalAir.XiTotalAir, vapPre.X_w); connect(toTotalAir.XiTotalAir, assertEquality.u2); end HumidityRatioPressure;

Buildings.Utilities.Psychrometrics.Examples.MassFraction_pTphi

Unit test for dew point temperature calculation

Buildings.Utilities.Psychrometrics.Examples.MassFraction_pTphi

Information

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

Modelica definition

model MassFraction_pTphi "Unit test for dew point temperature calculation" extends Modelica.Icons.Example; package Medium1 = Buildings.Media.Air "Medium model"; package Medium2 = Buildings.Media.Air "Medium model"; Modelica.Blocks.Sources.Ramp Phi( offset=0, duration=0.5, height=1) "Relative humidity"; Buildings.Utilities.Psychrometrics.X_pTphi masFra1 "Mass fraction computation"; Modelica.Blocks.Sources.Ramp T( height=10, offset=283.15, duration=0.5, startTime=0.5) "Temperature"; Modelica.Blocks.Sources.Constant P(k=101325) "Pressure"; Buildings.Utilities.Psychrometrics.X_pTphi masFra2(use_p_in=false) "Mass fraction computation"; equation connect(T.y, masFra1.T); connect(Phi.y, masFra1.phi); connect(T.y, masFra2.T); connect(Phi.y, masFra2.phi); connect(P.y, masFra1.p_in); end MassFraction_pTphi;

Buildings.Utilities.Psychrometrics.Examples.Phi_pTX

Model to test the relative humidity computation

Buildings.Utilities.Psychrometrics.Examples.Phi_pTX

Information

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

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

Modelica definition

model Phi_pTX "Model to test the relative humidity computation" extends Modelica.Icons.Example; package Medium = Buildings.Media.Air "Medium model"; Modelica.Blocks.Sources.Constant p(k=101325) "Pressure"; Modelica.Blocks.Sources.Ramp XDryBul( height=0.014, offset=0, duration=0.5) "Dry bulb water vapor mass fraction"; Buildings.Utilities.Psychrometrics.Phi_pTX phi "Relative humidity"; Modelica.Blocks.Sources.Ramp TDryBul( duration=0.5, startTime=0.5, height=-10, offset=303.15) "Dry bulb temperature"; equation connect(XDryBul.y, phi.X_w); connect(phi.p, p.y); connect(TDryBul.y, phi.T); end Phi_pTX;

Buildings.Utilities.Psychrometrics.Examples.SaturationPressure

Model to test the wet bulb temperature computation

Buildings.Utilities.Psychrometrics.Examples.SaturationPressure

Information

This examples is a unit test for the saturation pressure computation.

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

Modelica definition

model SaturationPressure "Model to test the wet bulb temperature computation" extends Modelica.Icons.Example; package Medium = Buildings.Media.Air "Medium model"; Buildings.Utilities.Psychrometrics.SaturationPressure pSat "Saturation pressure"; Modelica.Blocks.Sources.Ramp T( height=373.15 - 190, duration=1, offset=190) "Temperature"; equation connect(T.y, pSat.TSat); end SaturationPressure;

Buildings.Utilities.Psychrometrics.Examples.SaturationPressureLiquid

Model to test the wet bulb temperature computation

Buildings.Utilities.Psychrometrics.Examples.SaturationPressureLiquid

Information

This examples is a unit test for the saturation pressure computation of liquid water.

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

Modelica definition

model SaturationPressureLiquid "Model to test the wet bulb temperature computation" extends Modelica.Icons.Example; Buildings.Utilities.Psychrometrics.SaturationPressureLiquid pSat "Saturation pressure"; Modelica.Blocks.Sources.Ramp T( height=100, duration=1, offset=273.15) "Temperature"; equation connect(T.y, pSat.TSat); end SaturationPressureLiquid;

Buildings.Utilities.Psychrometrics.Examples.SublimationPressureIce

Model to test the wet bulb temperature computation

Buildings.Utilities.Psychrometrics.Examples.SublimationPressureIce

Information

This examples is a unit test for the sublimation pressure computation of ice.

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

Modelica definition

model SublimationPressureIce "Model to test the wet bulb temperature computation" extends Modelica.Icons.Example; Buildings.Utilities.Psychrometrics.SublimationPressureIce pSat "Saturation pressure"; Modelica.Blocks.Sources.Ramp T( height=273.15 - 190, duration=1, offset=190) "Temperature"; equation connect(T.y, pSat.TSat); end SublimationPressureIce;

Buildings.Utilities.Psychrometrics.Examples.TWetBul_TDryBulPhi

Model to test the wet bulb temperature computation

Buildings.Utilities.Psychrometrics.Examples.TWetBul_TDryBulPhi

Information

This examples is a unit test for the wet bulb computation. The model on the top uses the accurate computation of the wet bulb temperature, whereas the model below uses the approximate computation of the wet bulb temperature.

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

Modelica definition

model TWetBul_TDryBulPhi "Model to test the wet bulb temperature computation" extends Modelica.Icons.Example; package Medium = Buildings.Media.Air "Medium model"; Buildings.Utilities.Psychrometrics.TWetBul_TDryBulPhi wetBulPhi(redeclare package Medium = Medium) "Model for wet bulb temperature"; Modelica.Blocks.Sources.Constant p(k=101325) "Pressure"; Modelica.Blocks.Sources.Ramp phi( duration=1, height=0.98, offset=0.01) "Relative humidity"; Modelica.Blocks.Sources.Constant TDryBul(k=283.15) "Dry bulb temperature"; Buildings.Utilities.Psychrometrics.TWetBul_TDryBulPhi wetBulPhiApp(redeclare package Medium = Medium, approximateWetBulb=true) "Model for wet bulb temperature"; equation connect(p.y, wetBulPhi.p); connect(TDryBul.y, wetBulPhi.TDryBul); connect(phi.y, wetBulPhi.phi); connect(p.y, wetBulPhiApp.p); connect(TDryBul.y, wetBulPhiApp.TDryBul); connect(phi.y, wetBulPhiApp.phi); end TWetBul_TDryBulPhi;

Buildings.Utilities.Psychrometrics.Examples.TWetBul_TDryBulXi

Information

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

Modelica definition

model TWetBul_TDryBulXi extends Modelica.Icons.Example; package Medium = Buildings.Media.Air "Medium model"; Modelica.Blocks.Sources.Ramp TDryBul( height=10, duration=1, offset=273.15 + 30) "Dry bulb temperature"; Buildings.Utilities.Psychrometrics.TWetBul_TDryBulXi wetBul( redeclare package Medium = Medium) "Model for wet bulb temperature"; Modelica.Blocks.Sources.Constant p(k=101325) "Pressure"; Modelica.Blocks.Sources.Ramp XHum( duration=1, height=(0.0133 - 0.0175), offset=0.0175) "Humidity concentration"; Buildings.Utilities.Psychrometrics.TWetBul_TDryBulXi wetBulApp(redeclare package Medium = Medium, approximateWetBulb=true) "Model for wet bulb temperature"; equation connect(p.y, wetBul.p); connect(XHum.y, wetBul.Xi[1]); connect(TDryBul.y, wetBul.TDryBul); connect(p.y, wetBulApp.p); connect(XHum.y, wetBulApp.Xi[1]); connect(TDryBul.y, wetBulApp.TDryBul); end TWetBul_TDryBulXi;

Buildings.Utilities.Psychrometrics.Examples.TotalAirDryAir

Unit test for conversion of humidity per total air and dry air mass

Buildings.Utilities.Psychrometrics.Examples.TotalAirDryAir

Information

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

Modelica definition

model TotalAirDryAir "Unit test for conversion of humidity per total air and dry air mass" extends Modelica.Icons.Example; package Medium = Buildings.Media.Air "Medium model"; Modelica.Blocks.Sources.Ramp XHum( duration=1, height=(0.01 - 0.1), offset=0.1) "Humidity concentration"; ToTotalAir toTotalAir; ToDryAir toDryAir; Diagnostics.AssertEquality assertEquality(threShold=1E-5) "Checks that model and its inverse implementation are correct"; equation connect(toTotalAir.XiDry, XHum.y); connect(toTotalAir.XiTotalAir, toDryAir.XiTotalAir); connect(toDryAir.XiDry, assertEquality.u1); connect(assertEquality.u2, XHum.y); end TotalAirDryAir;

Buildings.Utilities.Psychrometrics.Examples.WetBul_pTX

Model to test the wet bulb temperature computation

Buildings.Utilities.Psychrometrics.Examples.WetBul_pTX

Information

This examples is a unit test for the wet bulb computation.

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

Modelica definition

model WetBul_pTX "Model to test the wet bulb temperature computation" extends Modelica.Icons.Example; package Medium = Buildings.Media.PerfectGases.MoistAirUnsaturated; Modelica.Blocks.Sources.Constant p(k=101325) "Pressure"; Modelica.Blocks.Sources.Ramp XDryBul( duration=1, height=0.014, offset=0) "Dry bulb water vapor mass fraction"; Modelica.Blocks.Sources.Constant TDryBul(k=293.15) "Dry bulb temperature"; Buildings.Utilities.Psychrometrics.WetBul_pTX wetBul_TDryBulX; equation connect(TDryBul.y, wetBul_TDryBulX.TDryBul); connect(XDryBul.y, wetBul_TDryBulX.XDryBul); connect(p.y, wetBul_TDryBulX.p); end WetBul_pTX;

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