Buildings.Controls.OBC.CDL.Psychrometrics.Validation
Collection of models that validate the psychrometrics blocks of the CDL
Information
This package contains models that validate the blocks in Buildings.Controls.OBC.CDL.Psychrometrics.
The examples plot various outputs, which have been verified against analytical solutions. These model outputs are stored as reference data to allow continuous validation whenever models in the library change.
Package Content
| Name | Description |
|---|---|
 DewPoint_TDryBulPhi
|
Model to test the dew point temperature computation |
| SpecificEnthalpy_TDryBulPhi
|
Model to test the specific enthalpy computation |
| WetBulb_TDryBulPhi
|
Model to test the wet bulb temperature computation |
Buildings.Controls.OBC.CDL.Psychrometrics.Validation.DewPoint_TDryBulPhi
Model to test the dew point temperature computation
Information
This examples is a unit test for the dew point temperature computation Buildings.Controls.OBC.CDL.Psychrometrics.DewPoint_TDryBulPhi.
Modelica definition
model DewPoint_TDryBulPhi
"Model to test the dew point temperature computation"
Buildings.Controls.OBC.CDL.Psychrometrics.DewPoint_TDryBulPhi dewBulPhi
"Model for dew point temperature";
Buildings.Controls.OBC.CDL.Continuous.Sources.Ramp phi(
duration=1,
height=1,
offset=0.001)
"Relative humidity";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant TDryBul(
k=273.15+29.4)
"Dry bulb temperature";
Buildings.Controls.OBC.CDL.Continuous.Sources.Ramp TDryBul2(
duration=1,
height=35,
offset=273.15+2.0)
"Dry bulb temperature";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant phi2(
k=0.4)
"Relative humidity";
// ============ Below blocks are from Buildings Library ============
Buildings.Utilities.Psychrometrics.TDewPoi_pW TDewPoi
"Dew point temperature";
Buildings.Utilities.Psychrometrics.X_pTphi X_pTphi(
use_p_in=false)
"Steam mass fraction";
Buildings.Utilities.Psychrometrics.pW_X humRat(
use_p_in=false)
"Water vapor pressure";
// ===================================================================
Buildings.Controls.OBC.CDL.Continuous.Subtract sub
"Dew point temperature difference";
Buildings.Controls.OBC.CDL.Psychrometrics.DewPoint_TDryBulPhi dewBulPhi1
"Model for dew point temperature";
Buildings.Utilities.Psychrometrics.TDewPoi_pW TDewPoi1
"Dew point temperature";
Buildings.Utilities.Psychrometrics.pW_X humRat1(
use_p_in=false)
"Water vapor pressure";
Buildings.Utilities.Psychrometrics.X_pTphi X_pTphi1(
use_p_in=false)
"Steam mass fraction";
Buildings.Controls.OBC.CDL.Continuous.Subtract sub1
"Dew point temperature difference";
equation
connect(humRat.p_w,TDewPoi.p_w);
connect(X_pTphi.X[1],humRat.X_w);
connect(TDryBul.y,dewBulPhi.TDryBul);
connect(phi.y,dewBulPhi.phi);
connect(TDryBul.y,X_pTphi.T);
connect(phi.y,X_pTphi.phi);
connect(TDewPoi.T,sub.u2);
connect(dewBulPhi.TDewPoi,sub.u1);
connect(TDryBul2.y,dewBulPhi1.TDryBul);
connect(TDryBul2.y,X_pTphi1.T);
connect(phi2.y,dewBulPhi1.phi);
connect(phi2.y,X_pTphi1.phi);
connect(X_pTphi1.X[1],humRat1.X_w);
connect(humRat1.p_w,TDewPoi1.p_w);
connect(dewBulPhi1.TDewPoi,sub1.u1);
connect(TDewPoi1.T,sub1.u2);
end DewPoint_TDryBulPhi;
Buildings.Controls.OBC.CDL.Psychrometrics.Validation.SpecificEnthalpy_TDryBulPhi
Model to test the specific enthalpy computation
Information
This examples is a unit test for the specific enthalpy computation Buildings.Controls.OBC.CDL.Psychrometrics.SpecificEnthalpy_TDryBulPhi.
Modelica definition
model SpecificEnthalpy_TDryBulPhi
"Model to test the specific enthalpy computation"
Buildings.Controls.OBC.CDL.Psychrometrics.SpecificEnthalpy_TDryBulPhi hBulPhi
"Model for specific enthalpy computation";
Buildings.Controls.OBC.CDL.Continuous.Sources.Ramp phi(
duration=1,
height=1,
offset=0.001)
"Relative humidity";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant TDryBul(
k=273.15+29.4)
"Dry bulb temperature";
equation
connect(TDryBul.y,hBulPhi.TDryBul);
connect(phi.y,hBulPhi.phi);
end SpecificEnthalpy_TDryBulPhi;
Buildings.Controls.OBC.CDL.Psychrometrics.Validation.WetBulb_TDryBulPhi
Model to test the wet bulb temperature computation
Information
This examples is a unit test for the dew point temperature computation Buildings.Controls.OBC.CDL.Psychrometrics.WetBulb_TDryBulPhi.
Modelica definition
model WetBulb_TDryBulPhi
"Model to test the wet bulb temperature computation"
package Medium=Buildings.Media.Air
"Medium model";
Buildings.Controls.OBC.CDL.Psychrometrics.WetBulb_TDryBulPhi wetBulPhi
"Model for wet bulb temperature";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant p(
k=101325)
"Pressure";
Buildings.Controls.OBC.CDL.Continuous.Sources.Ramp phi(
duration=1,
height=0.95,
offset=0.05)
"Relative humidity";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant TDryBul(
k=273.15+29.4)
"Dry bulb temperature";
// ============ Below blocks are from Buildings Library ============
Buildings.Utilities.Psychrometrics.TWetBul_TDryBulPhi wetBulPhi_BuiLib(
redeclare package Medium=Medium,
approximateWetBulb=true)
"Model for wet bulb temperature";
Buildings.Utilities.Psychrometrics.TWetBul_TDryBulXi wetBulXi(
redeclare package Medium=Medium,
approximateWetBulb=true)
"Model for wet bulb temperature using Xi as an input, used to verify consistency with wetBulPhi";
Buildings.Utilities.Psychrometrics.X_pTphi x_pTphi
"Computes mass fraction";
// ===================================================================
Buildings.Controls.OBC.CDL.Continuous.Subtract sub
"Wet bulb temperature difference";
Buildings.Controls.OBC.CDL.Continuous.Subtract sub1
"Wet bulb temperature difference";
equation
connect(x_pTphi.X[1],wetBulXi.Xi[1]);
connect(TDryBul.y,wetBulPhi.TDryBul);
connect(TDryBul.y,wetBulPhi_BuiLib.TDryBul);
connect(TDryBul.y,wetBulXi.TDryBul);
connect(p.y,x_pTphi.p_in);
connect(phi.y,x_pTphi.phi);
connect(p.y,wetBulXi.p);
connect(phi.y,wetBulPhi_BuiLib.phi);
connect(phi.y,wetBulPhi.phi);
connect(p.y,wetBulPhi_BuiLib.p);
connect(TDryBul.y,x_pTphi.T);
connect(wetBulPhi.TWetBul,sub.u1);
connect(wetBulPhi_BuiLib.TWetBul,sub.u2);
connect(sub1.u1,sub.u1);
connect(wetBulXi.TWetBul,sub1.u2);
end WetBulb_TDryBulPhi;