Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples
Package with example of water source DX cooling coil models
Information
This package contains examples that use water source DX cooling coil models.Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
Package Content
| Name | Description |
|---|---|
 MultiStage
|
Test model for multi speed water source DX coil |
| SingleSpeed
|
Test model for single speed DX coil |
| VariableSpeed
|
Test model for variable speed DX coil |
 PerformanceCurves
|
Package with sevral performance curves |
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.MultiStage
Test model for multi speed water source DX coil
Information
This is a test model for Buildings.Fluid.DXSystems.Cooling.WaterSource.MultiStage. The model has open-loop control and time-varying input conditions.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| MassFlowRate | m_flow_nominal | datCoi.sta[datCoi.nSta].nomV... | Nominal mass flow rate [kg/s] |
| PressureDifference | dpEva_nominal | 1000 | Pressure drop at m_flow_nominal [Pa] |
| PressureDifference | dpCon_nominal | 40000 | Pressure drop at mCon_flow_nominal [Pa] |
| DXCoil | datCoi | datCoi(nSta=4, sta={Building... | Coil data |
Modelica definition
model MultiStage "Test model for multi speed water source DX coil"
package MediumAir = Buildings.Media.Air;
package MediumWater = Buildings.Media.Water;
extends Modelica.Icons.Example;
parameter Modelica.Units.SI.MassFlowRate m_flow_nominal=datCoi.sta[datCoi.nSta].nomVal.m_flow_nominal
"Nominal mass flow rate";
parameter Modelica.Units.SI.PressureDifference dpEva_nominal=1000
"Pressure drop at m_flow_nominal";
parameter Modelica.Units.SI.PressureDifference dpCon_nominal=40000
"Pressure drop at mCon_flow_nominal";
Buildings.Fluid.Sources.Boundary_pT sinAir(
redeclare package Medium = MediumAir,
nPorts=1,
p(displayUnit="Pa")) "Sink on air side";
Buildings.Fluid.Sources.MassFlowSource_T souAir(
redeclare package Medium = MediumAir,
use_T_in=true,
nPorts=1,
m_flow=1.5,
T=299.85) "Source on air side";
Modelica.Blocks.Sources.Ramp TEvaIn(
duration=600,
startTime=2400,
height=-5,
offset=273.15 + 23) "Temperature";
Buildings.Fluid.DXSystems.Cooling.WaterSource.MultiStage mulSpeDX(
redeclare package MediumEva = MediumAir,
redeclare package MediumCon = MediumWater,
datCoi=datCoi,
dpEva_nominal=dpEva_nominal,
dpCon_nominal=dpCon_nominal,
show_T=true,
energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState)
"Multi-speed DX coil";
parameter Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.DXCoil
datCoi(nSta=4, sta={
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.Stage(
spe=900/60,
nomVal=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.NominalValues(
Q_flow_nominal=-12000,
COP_nominal=3,
SHR_nominal=0.8,
m_flow_nominal=0.9,
mCon_flow_nominal=0.57143,
TEvaIn_nominal=273.15 + 26.67,
TConIn_nominal=273.15 + 29.4),
perCur=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.PerformanceCurves.Curve_I()),
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.Stage(
spe=1200/60,
nomVal=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.NominalValues(
Q_flow_nominal=-18000,
COP_nominal=3,
SHR_nominal=0.8,
m_flow_nominal=1.2,
mCon_flow_nominal=0.85714,
TEvaIn_nominal=273.15 + 26.67,
TConIn_nominal=273.15 + 29.4),
perCur=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.PerformanceCurves.Curve_I()),
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.Stage(
spe=1800/60,
nomVal=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.NominalValues(
Q_flow_nominal=-21000,
COP_nominal=3,
SHR_nominal=0.8,
m_flow_nominal=1.5,
mCon_flow_nominal=1,
TEvaIn_nominal=273.15 + 26.67,
TConIn_nominal=273.15 + 29.4),
perCur=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.PerformanceCurves.Curve_I()),
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.Stage(
spe=2400/60,
nomVal=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.NominalValues(
Q_flow_nominal=-30000,
COP_nominal=3,
SHR_nominal=0.8,
m_flow_nominal=1.8,
mCon_flow_nominal=1.42857,
TEvaIn_nominal=273.15 + 26.67,
TConIn_nominal=273.15 + 29.4),
perCur=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.PerformanceCurves.Curve_I())})
"Coil data";
Modelica.Blocks.Sources.Ramp mCon_flow(
duration=600,
startTime=6000,
height=0,
offset=1) "Condenser inlet mass flow";
Buildings.Fluid.Sources.MassFlowSource_T souWat(
redeclare package Medium = MediumWater,
nPorts=1,
use_T_in=false,
use_m_flow_in=true,
T=298.15) "Source on water side";
Buildings.Fluid.Sources.Boundary_pT sinWat(
redeclare package Medium = MediumWater,
nPorts=1,
p(displayUnit="Pa")) "Sink on water side";
Modelica.Blocks.Sources.IntegerTable speRat(table=[
0.0,0.0;
900,1;
1800,4;
2700,3;
3600,2]) "Speed ratio ";
equation
connect(TEvaIn.y, souAir.T_in);
connect(mulSpeDX.portCon_a, souWat.ports[1]);
connect(mulSpeDX.portCon_b, sinWat.ports[1]);
connect(souAir.ports[1], mulSpeDX.port_a);
connect(sinAir.ports[1], mulSpeDX.port_b);
connect(mCon_flow.y, souWat.m_flow_in);
connect(speRat.y,mulSpeDX. stage);
end MultiStage;
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.SingleSpeed
Test model for single speed DX coil
Information
This is a test model for Buildings.Fluid.DXSystems.Cooling.WaterSource.SingleSpeed. The model has open-loop control and time-varying input conditions.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| MassFlowRate | m_flow_nominal | datCoi.sta[datCoi.nSta].nomV... | Nominal mass flow rate [kg/s] |
| PressureDifference | dpEva_nominal | 1000 | Pressure drop at m_flow_nominal [Pa] |
| PressureDifference | dpCon_nominal | 40000 | Pressure drop at mCon_flow_nominal [Pa] |
| DXCoil | datCoi | datCoi(nSta=1, sta={Building... | Coil data |
Modelica definition
model SingleSpeed "Test model for single speed DX coil"
package MediumAir = Buildings.Media.Air;
package MediumWater = Buildings.Media.Water;
extends Modelica.Icons.Example;
parameter Modelica.Units.SI.MassFlowRate m_flow_nominal=datCoi.sta[datCoi.nSta].nomVal.m_flow_nominal
"Nominal mass flow rate";
parameter Modelica.Units.SI.PressureDifference dpEva_nominal=1000
"Pressure drop at m_flow_nominal";
parameter Modelica.Units.SI.PressureDifference dpCon_nominal=40000
"Pressure drop at mCon_flow_nominal";
Buildings.Fluid.Sources.Boundary_pT sinAir(
redeclare package Medium = MediumAir,
nPorts=1,
p(displayUnit="Pa")) "Sink on air side";
Buildings.Fluid.Sources.MassFlowSource_T souAir(
redeclare package Medium = MediumAir,
use_T_in=true,
nPorts=1,
m_flow=1.5,
T=299.85) "Source on air side";
Modelica.Blocks.Sources.BooleanStep onOff(startTime=600)
"Compressor on-off signal";
Modelica.Blocks.Sources.Ramp TEvaIn(
duration=600,
startTime=2400,
height=-5,
offset=273.15 + 23) "Temperature";
Buildings.Fluid.DXSystems.Cooling.WaterSource.SingleSpeed sinSpeDX(
redeclare package MediumEva = MediumAir,
redeclare package MediumCon = MediumWater,
datCoi=datCoi,
dpEva_nominal=dpEva_nominal,
dpCon_nominal=dpCon_nominal,
show_T=true,
energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState)
"Single speed DX coil";
parameter Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.DXCoil
datCoi(nSta=1, sta={
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.Stage(
spe=1800/60,
nomVal=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.NominalValues(
Q_flow_nominal=-21000,
COP_nominal=3,
SHR_nominal=0.8,
m_flow_nominal=1.5,
mCon_flow_nominal=1,
TEvaIn_nominal=273.15 + 26.67,
TConIn_nominal=273.15 + 29.4),
perCur=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.PerformanceCurves.Curve_I())})
"Coil data";
Modelica.Blocks.Sources.Ramp mCon_flow(
duration=600,
startTime=6000,
height=0,
offset=1) "Condenser inlet mass flow";
Buildings.Fluid.Sources.MassFlowSource_T souWat(
redeclare package Medium = MediumWater,
nPorts=1,
use_T_in=false,
use_m_flow_in=true,
T=298.15) "Source on water side";
Buildings.Fluid.Sources.Boundary_pT sinWat(
redeclare package Medium = MediumWater,
nPorts=1,
p(displayUnit="Pa")) "Sink on water side";
equation
connect(TEvaIn.y, souAir.T_in);
connect(onOff.y, sinSpeDX.on);
connect(sinSpeDX.portCon_a, souWat.ports[1]);
connect(sinSpeDX.portCon_b, sinWat.ports[1]);
connect(souAir.ports[1], sinSpeDX.port_a);
connect(sinAir.ports[1], sinSpeDX.port_b);
connect(mCon_flow.y, souWat.m_flow_in);
end SingleSpeed;
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.VariableSpeed
Test model for variable speed DX coil
Information
This is a test model for Buildings.Fluid.DXSystems.Cooling.WaterSource.VariableSpeed. The model has open-loop control and time-varying input conditions.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| MassFlowRate | m_flow_nominal | datCoi.sta[datCoi.nSta].nomV... | Nominal mass flow rate [kg/s] |
| PressureDifference | dpEva_nominal | 1000 | Pressure drop at m_flow_nominal [Pa] |
| PressureDifference | dpCon_nominal | 40000 | Pressure drop at mCon_flow_nominal [Pa] |
| DXCoil | datCoi | datCoi(nSta=1, sta={Building... | Coil data |
Modelica definition
model VariableSpeed "Test model for variable speed DX coil"
package MediumAir = Buildings.Media.Air;
package MediumWater = Buildings.Media.Water;
extends Modelica.Icons.Example;
parameter Modelica.Units.SI.MassFlowRate m_flow_nominal=datCoi.sta[datCoi.nSta].nomVal.m_flow_nominal
"Nominal mass flow rate";
parameter Modelica.Units.SI.PressureDifference dpEva_nominal=1000
"Pressure drop at m_flow_nominal";
parameter Modelica.Units.SI.PressureDifference dpCon_nominal=40000
"Pressure drop at mCon_flow_nominal";
Buildings.Fluid.Sources.Boundary_pT sinAir(
redeclare package Medium = MediumAir,
nPorts=1,
p(displayUnit="Pa")) "Sink on air side";
Buildings.Fluid.Sources.MassFlowSource_T souAir(
redeclare package Medium = MediumAir,
use_T_in=true,
nPorts=1,
m_flow=1.5,
T=299.85) "Source on air side";
Modelica.Blocks.Sources.Ramp TEvaIn(
duration=600,
startTime=2400,
height=-5,
offset=273.15 + 23) "Temperature";
Buildings.Fluid.DXSystems.Cooling.WaterSource.VariableSpeed varSpeDX(
redeclare package MediumEva = MediumAir,
redeclare package MediumCon = MediumWater,
dpEva_nominal=dpEva_nominal,
dpCon_nominal=dpCon_nominal,
datCoi=datCoi,
show_T=true,
minSpeRat=datCoi.minSpeRat,
energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState)
"Variable speed DX coil";
parameter Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.DXCoil
datCoi(nSta=1, sta={
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.Stage(
spe=1800/60,
nomVal=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Data.Generic.BaseClasses.NominalValues(
Q_flow_nominal=-21000,
COP_nominal=3,
SHR_nominal=0.8,
m_flow_nominal=1.5,
mCon_flow_nominal=1,
TEvaIn_nominal=273.15 + 26.67,
TConIn_nominal=273.15 + 29.4),
perCur=
Buildings.Fluid.DXSystems.Cooling.WaterSource.Examples.PerformanceCurves.Curve_I())})
"Coil data";
Modelica.Blocks.Sources.Ramp mCon_flow(
duration=600,
startTime=6000,
height=0,
offset=1) "Condenser inlet mass flow";
Buildings.Fluid.Sources.MassFlowSource_T souWat(
redeclare package Medium = MediumWater,
nPorts=1,
use_T_in=false,
use_m_flow_in=true,
T=298.15) "Source on water side";
Buildings.Fluid.Sources.Boundary_pT sinWat(
redeclare package Medium = MediumWater,
nPorts=1,
p(displayUnit="Pa")) "Sink on water side";
Modelica.Blocks.Sources.TimeTable speRat(table=[0.0,0.0; 100,0.0; 900,0.2;
1800,0.8; 2700,0.75; 3600,0.75]) "Speed ratio ";
equation
connect(TEvaIn.y, souAir.T_in);
connect(varSpeDX.portCon_a, souWat.ports[1]);
connect(varSpeDX.portCon_b, sinWat.ports[1]);
connect(souAir.ports[1], varSpeDX.port_a);
connect(sinAir.ports[1], varSpeDX.port_b);
connect(mCon_flow.y, souWat.m_flow_in);
connect(speRat.y, varSpeDX.speRat);
end VariableSpeed;