Buildings.DHC.Plants.Combined.Controls.BaseClasses.Validation
Package with validation models
Information
This package contains validation models.
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
Package Content
| Name | Description |
|---|---|
 StageIndex
|
|
| StagingPlant
|
Validation of plant staging block |
| StagingPump
|
Validation of pump staging block |
Buildings.DHC.Plants.Combined.Controls.BaseClasses.Validation.StageIndex
Information
This is a validation model for the block Buildings.DHC.Plants.Combined.Controls.BaseClasses.StageIndex.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
model StageIndex
extends Modelica.Icons.Example;
Buildings.DHC.Plants.Combined.Controls.BaseClasses.StageIndex
sta(nSta=3, tSta=60) "Staging";
Buildings.Controls.OBC.CDL.Logical.Sources.TimeTable booTimTab(
table=[0,0,0,0; 1,1,0,0; 2,1,1,1; 3,0,1,1; 4,1,0,0; 5,1,0,1; 6,1,1,0; 7,1,0,
1],
timeScale=100,
period=1000) "Source signal";
equation
connect(booTimTab.y[1], sta.u1);
connect(booTimTab.y[2], sta.u1Up);
connect(booTimTab.y[3], sta.u1Dow);
end StageIndex;
Buildings.DHC.Plants.Combined.Controls.BaseClasses.Validation.StagingPlant
Validation of plant staging block
Information
This is a validation model for the plant staging logic implemented in Buildings.DHC.Plants.Combined.Controls.BaseClasses.StagingPlant.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | PLRStaTra | 0.85 | Part load ratio triggering stage transition [1] |
| CHW loop and cooling-only chillers | |||
| Integer | nChi | 2 | Number of units operating at design conditions |
| Real | QChiWatChi_flow_nominal | -4.4E6 | Cooling design heat flow rate of cooling-only chillers (all units) [W] |
| HW loop and heat recovery chillers | |||
| Integer | nChiHea | 3 | Number of units operating at design conditions |
| Real | QChiWatCasCoo_flow_nominal | -6E6 | Cooling design heat flow rate of HRC in cascading cooling mode (all units) [W] |
| Real | QHeaWat_flow_nominal | 6.4E6 | Heating design heat flow rate (all units) [W] |
Modelica definition
model StagingPlant "Validation of plant staging block"
extends Modelica.Icons.Example;
parameter Integer nChi(final min=1, start=1)=2
"Number of units operating at design conditions";
parameter Real QChiWatChi_flow_nominal(
unit="W",
quantity="HeatFlowRate")=-4.4E6
"Cooling design heat flow rate of cooling-only chillers (all units)";
parameter Integer nChiHea(final min=1, start=1)=3
"Number of units operating at design conditions";
parameter Real PLRStaTra(final unit="1", final min=0, final max=1) = 0.85
"Part load ratio triggering stage transition";
parameter Real QChiWatCasCoo_flow_nominal(
unit="W",
quantity="HeatFlowRate")=-6E6
"Cooling design heat flow rate of HRC in cascading cooling mode (all units)";
parameter Real QHeaWat_flow_nominal(
unit="W",
quantity="HeatFlowRate")=6.4E6
"Heating design heat flow rate (all units)";
final parameter Real mChiWat_flow_nominal(
unit="W",
quantity="HeatFlowRate")=abs(QChiWatChi_flow_nominal+QChiWatCasCoo_flow_nominal)/
Buildings.Utilities.Psychrometrics.Constants.cpWatLiq / 5
"CHW design mass flow rate";
final parameter Real mHeaWat_flow_nominal(
unit="W",
quantity="HeatFlowRate")=QHeaWat_flow_nominal/
Buildings.Utilities.Psychrometrics.Constants.cpWatLiq / 10
"HW design mass flow rate";
Buildings.DHC.Plants.Combined.Controls.BaseClasses.StagingPlant
staChi(
final nChi=nChi,
final nChiHea=nChiHea,
final QChiWatChi_flow_nominal=QChiWatChi_flow_nominal,
final QChiWatCasCoo_flow_nominal=QChiWatCasCoo_flow_nominal,
final QChiWatCasCoo_flow_nominal_approx=QChiWatCasCoo_flow_nominal,
final QHeaWat_flow_nominal=QHeaWat_flow_nominal) "Chiller staging block";
Buildings.Controls.OBC.CDL.Reals.Sources.TimeTable ratFlo(table=[0,0,0; 1,
0,0; 4,0.3,0.1; 5,1,0.1; 10,0.1,0.1; 13,1,0.3; 16,0.3,1;20,0.1,0.1; 24,0.1,0.3; 25,
0.1,1; 30,0,0],
timeScale=1000) "Source signal";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant TChiWatSupSet(k=7 + 273.15)
"Source signal";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant TChiWatPriRet(k=12 + 273.15)
"Source signal";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant THeaWatSupSet(k=60 + 273.15)
"Source signal";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant THeaWatPriRet(k=50 + 273.15)
"Source signal";
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter sca(
final k=mChiWat_flow_nominal) "Scale signal";
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter sca1(
final k=mHeaWat_flow_nominal)
"Scale signal";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant dpSet(k=20E4)
"Source signal";
Buildings.Controls.OBC.CDL.Reals.Sources.CivilTime civTim
"Model time";
Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr
"Enable";
equation
connect(TChiWatSupSet.y, staChi.TChiWatSupSet);
connect(THeaWatPriRet.y, staChi.THeaWatPriRet);
connect(THeaWatSupSet.y, staChi.THeaWatSupSet);
connect(TChiWatPriRet.y, staChi.TChiWatPriRet);
connect(sca.y, staChi.mChiWatPri_flow);
connect(sca1.y, staChi.mHeaWatPri_flow);
connect(TChiWatSupSet.y, staChi.TChiWatSup);
connect(dpSet.y, staChi.dpChiWat);
connect(dpSet.y, staChi.dpChiWatSet);
connect(dpSet.y, staChi.dpHeaWatSet);
connect(dpSet.y, staChi.dpHeaWat);
connect(THeaWatSupSet.y, staChi.THeaWatSup);
connect(ratFlo.y[1], sca.u);
connect(ratFlo.y[2], sca1.u);
connect(civTim.y, greThr.u);
connect(greThr.y, staChi.u1Coo);
connect(greThr.y, staChi.u1Hea);
end StagingPlant;
Buildings.DHC.Plants.Combined.Controls.BaseClasses.Validation.StagingPump
Validation of pump staging block
Information
This is a validation model for the pump staging logic implemented in Buildings.DHC.Plants.Combined.Controls.BaseClasses.StagingPump.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nPum | 3 | Number of pumps |
| Integer | nChi | 1 | Number of chillers served by the pumps |
| Nominal condition | |||
| Real | m_flow_nominal | 1 | [kg/s] |
Modelica definition
model StagingPump "Validation of pump staging block"
extends Modelica.Icons.Example;
parameter Integer nPum(
final min=1,
start=1)=3
"Number of pumps";
parameter Integer nChi(
final min=1,
start=1)=1
"Number of chillers served by the pumps";
parameter Real m_flow_nominal(
unit="kg/s",
quantity="MassFlowRate")=1;
Buildings.Controls.OBC.CDL.Reals.Sources.TimeTable floSpe(
table=[
0,0,0;
1,0,0;
4,(nPum - 1)/nPum*m_flow_nominal,1;
5,m_flow_nominal,0.9;
10,0,0.1],
timeScale=500)
"Source signal";
Buildings.DHC.Plants.Combined.Controls.BaseClasses.StagingPump
staDet(
final nPum=nPum,
final m_flow_nominal=m_flow_nominal)
"Pump staging block - Detailed version";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant yVal(k=1)
"Source signal";
Buildings.Controls.OBC.CDL.Reals.GreaterThreshold isOpe(t=0.1,
h=5E-2) "Check if valve open";
equation
connect(floSpe.y[1],staDet. m_flow);
connect(floSpe.y[2],staDet. y);
connect(yVal.y, isOpe.u);
connect(isOpe.y,staDet.y1Ena);
end StagingPump;