Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.BaseClasses
Package with base classes for Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation
Information
This package contains base classes for models in Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.
Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).
Package Content
| Name | Description |
|---|---|
 PartialAirHandlerControl
|
Partial model for testing air hanlders with temperature and humidity control |
| PartialAirHandlerMassFlow
|
Partial model for testing air handler at variable mass flowrate |
| PartialPlant
|
Partial examples for Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation |
Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.BaseClasses.PartialAirHandlerControl
Partial model for testing air hanlders with temperature and humidity control
Information
Partial model for testing temperature and humidity control in air handling units.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| MassFlowRate | m1_flow_nominal | 2.9 | Nominal mass flow rate [kg/s] |
| MassFlowRate | m2_flow_nominal | 3.3 | Nominal mass flow rate [kg/s] |
| Temperature | T_a1_nominal | 6 + 273.15 | Nominal water inlet temperature [K] |
| Temperature | T_b1_nominal | 11 + 273.15 | Nominal water outlet temperature [K] |
| Temperature | T_a2_nominal | 26 + 273.15 | Nominal air inlet temperature [K] |
| Temperature | T_b2_nominal | 12 + 273.15 | Nominal air outlet temperature [K] |
Modelica definition
partial model PartialAirHandlerControl
"Partial model for testing air hanlders with temperature and humidity control"
package Medium1 = Buildings.Media.Water "Medium model for water";
package Medium2 = Buildings.Media.Air "Medium model for air";
parameter Modelica.SIunits.MassFlowRate m1_flow_nominal(min=0)=2.9
"Nominal mass flow rate";
parameter Modelica.SIunits.MassFlowRate m2_flow_nominal(min=0)=3.3
"Nominal mass flow rate";
parameter Modelica.SIunits.Temperature T_a1_nominal=6 + 273.15
"Nominal water inlet temperature";
parameter Modelica.SIunits.Temperature T_b1_nominal=11 + 273.15
"Nominal water outlet temperature";
parameter Modelica.SIunits.Temperature T_a2_nominal=26 + 273.15
"Nominal air inlet temperature";
parameter Modelica.SIunits.Temperature T_b2_nominal=12 + 273.15
"Nominal air outlet temperature";
Buildings.Fluid.Sources.Boundary_pT sin_2(
redeclare package Medium = Medium2,
nPorts=1,
use_p_in=false,
p(displayUnit="Pa"),
T=303.15)
"Sink for water";
Buildings.Fluid.Sources.Boundary_pT sou_2(
redeclare package Medium = Medium2,
X={0.02,1 - 0.02},
use_T_in=true,
use_X_in=true,
p(displayUnit="Pa"))
"Source for water";
Buildings.Fluid.Sources.Boundary_pT sin_1(
redeclare package Medium = Medium1,
nPorts=1,
use_p_in=false,
p=300000,
T=293.15)
"Sink for air";
Buildings.Fluid.Sources.Boundary_pT sou_1(
redeclare package Medium = Medium1,
use_T_in=true,
p=300000 + 12000,
nPorts=1)
"Sink for air";
Buildings.Fluid.FixedResistances.PressureDrop res_2(
from_dp=true,
redeclare package Medium = Medium2,
dp_nominal=100,
m_flow_nominal=m2_flow_nominal)
"Flow resistance";
Buildings.Fluid.FixedResistances.PressureDrop res_1(
from_dp=true,
redeclare package Medium = Medium1,
dp_nominal=3000,
m_flow_nominal=m1_flow_nominal)
"Flow resistance";
Modelica.Blocks.Sources.Constant TSet(
k(unit="K")=289.15)
"Setpoint temperature";
Modelica.Blocks.Sources.Constant relHum(k=0.8)
"Relative humidity";
Buildings.Utilities.Psychrometrics.X_pTphi x_pTphi(use_p_in=false);
Modelica.Blocks.Sources.Constant temSou_2(k=T_a2_nominal)
"Temperature boundary for source 2";
Modelica.Blocks.Sources.Step TWat(
offset=T_a1_nominal,
height=3,
startTime=1500)
"Water temperature";
Buildings.Fluid.Sensors.MassFractionTwoPort masFra(
redeclare package Medium = Medium2, m_flow_nominal=m2_flow_nominal)
"Sensor for mass fraction";
Buildings.Fluid.Sensors.TemperatureTwoPort temSenWat1(
redeclare package Medium = Medium1, m_flow_nominal=m2_flow_nominal)
"Temperature sensor for water";
Buildings.Fluid.Sensors.TemperatureTwoPort temSenAir2(
redeclare package Medium = Medium2, m_flow_nominal=m2_flow_nominal)
"Temperature for air";
Buildings.Fluid.Sensors.TemperatureTwoPort temSenWat2(
redeclare package Medium = Medium1, m_flow_nominal=m2_flow_nominal)
"Temperature for water";
equation
connect(sin_1.ports[1],res_1. port_b);
connect(sin_2.ports[1],res_2. port_b);
connect(x_pTphi.X,sou_2. X_in);
connect(relHum.y, x_pTphi.phi);
connect(temSou_2.y, x_pTphi.T);
connect(temSou_2.y, sou_2.T_in);
connect(TWat.y,sou_1. T_in);
connect(masFra.port_b, res_2.port_a);
connect(temSenWat1.port_a, sou_1.ports[1]);
connect(temSenAir2.port_b, masFra.port_a);
connect(temSenWat2.port_b, res_1.port_a);
end PartialAirHandlerControl;
Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.BaseClasses.PartialAirHandlerMassFlow
Partial model for testing air handler at variable mass flowrate
Information
Partial model for testing the air handling unit model with given control signals.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| MassFlowRate | m1_flow_nominal | 2.9 | Nominal mass flow rate [kg/s] |
| MassFlowRate | m2_flow_nominal | 3.3 | Nominal mass flow rate [kg/s] |
| Temperature | T_a1_nominal | 6 + 273.15 | Nominal water inlet temperature [K] |
| Temperature | T_b1_nominal | 11 + 273.15 | Nominal water outlet temperature [K] |
| Temperature | T_a2_nominal | 26 + 273.15 | Nominal air inlet temperature [K] |
| Temperature | T_b2_nominal | 12 + 273.15 | Nominal air outlet temperature [K] |
Modelica definition
partial model PartialAirHandlerMassFlow
"Partial model for testing air handler at variable mass flowrate"
package Medium1 = Buildings.Media.Water "Medium model for water";
package Medium2 = Buildings.Media.Air "Medium model for air";
parameter Modelica.SIunits.MassFlowRate m1_flow_nominal(min=0)=2.9
"Nominal mass flow rate";
parameter Modelica.SIunits.MassFlowRate m2_flow_nominal(min=0)=3.3
"Nominal mass flow rate";
parameter Modelica.SIunits.Temperature T_a1_nominal=6 + 273.15
"Nominal water inlet temperature";
parameter Modelica.SIunits.Temperature T_b1_nominal=11 + 273.15
"Nominal water outlet temperature";
parameter Modelica.SIunits.Temperature T_a2_nominal=26 + 273.15
"Nominal air inlet temperature";
parameter Modelica.SIunits.Temperature T_b2_nominal=12 + 273.15
"Nominal air outlet temperature";
Buildings.Fluid.Sources.Boundary_pT sin_2(
redeclare package Medium = Medium2,
T=T_a2_nominal,
nPorts=1)
"Sink for air";
Buildings.Fluid.Sources.Boundary_pT sou_2(
redeclare package Medium = Medium2,
T=T_a2_nominal,
X={0.02,1 - 0.02},
use_T_in=true,
use_X_in=true)
"Source for air";
Buildings.Fluid.Sources.MassFlowSource_T sin_1(
redeclare package Medium = Medium1,
T=T_a1_nominal,
use_m_flow_in=true,
nPorts=1)
"Source for water";
Buildings.Fluid.Sources.Boundary_pT sou_1(
redeclare package Medium = Medium1,
use_T_in=false,
T=T_a1_nominal,
nPorts=1)
"Sink for water";
Modelica.Blocks.Sources.Constant relHum(k=0.8) "Relative humidity";
Buildings.Utilities.Psychrometrics.X_pTphi x_pTphi(use_p_in=false);
Modelica.Blocks.Sources.Constant temSou_2(k=T_a2_nominal)
"Temperature boundary condition";
Modelica.Blocks.Math.Gain mWat_flow(k=-m1_flow_nominal)
"Water mass flow rate";
Modelica.Blocks.Sources.TimeTable mWatGai(
table=[0,1; 3600*0.1,1; 3600*0.2,0.1; 3600*0.3,0.1])
"Gain for water mass flow rate";
Buildings.Fluid.Sensors.TemperatureTwoPort temSenWat1(
redeclare package Medium = Medium1,
m_flow_nominal=m2_flow_nominal)
"Temperature sensor for water";
Buildings.Fluid.Sensors.TemperatureTwoPort temSenWat2(
redeclare package Medium = Medium1,
m_flow_nominal=m2_flow_nominal)
"Temperature sensor for water";
Buildings.Fluid.Sensors.TemperatureTwoPort temSenAir2(
redeclare package Medium = Medium2,
m_flow_nominal=m2_flow_nominal)
"Temperature for air";
equation
connect(x_pTphi.X, sou_2.X_in);
connect(relHum.y, x_pTphi.phi);
connect(temSou_2.y, x_pTphi.T);
connect(temSou_2.y, sou_2.T_in);
connect(mWatGai.y, mWat_flow.u);
connect(mWat_flow.y, sin_1.m_flow_in);
connect(temSenWat1.port_a, sou_1.ports[1]);
connect(temSenAir2.port_b, sin_2.ports[1]);
connect(temSenWat2.port_b, sin_1.ports[1]);
end PartialAirHandlerMassFlow;
Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.BaseClasses.PartialPlant
Partial examples for Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation
Information
This is a partial model for the examples in Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| MassFlowRate | mCHW_flow_nominal | 2567.1*1000/(4200*10) | Nominal mass flow rate at chilled water [kg/s] |
| MassFlowRate | mCW_flow_nominal | 2567.1*1000/(4200*8.5) | Nominal mass flow rate at condenser water [kg/s] |
| PressureDifference | dpCHW_nominal | 40000 | Nominal pressure [Pa] |
| PressureDifference | dpCW_nominal | 40000 | Nominal pressure [Pa] |
| Integer | numChi | 1 | Number of chillers |
Modelica definition
partial model PartialPlant
"Partial examples for Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation"
package MediumCHW = Buildings.Media.Water "Medium model";
package MediumCW = Buildings.Media.Water "Medium model";
parameter Modelica.SIunits.MassFlowRate mCHW_flow_nominal=2567.1*1000/(
4200*10)
"Nominal mass flow rate at chilled water";
parameter Modelica.SIunits.MassFlowRate mCW_flow_nominal=2567.1*1000/ (
4200*8.5)
"Nominal mass flow rate at condenser water";
parameter Modelica.SIunits.PressureDifference dpCHW_nominal = 40000
"Nominal pressure";
parameter Modelica.SIunits.PressureDifference dpCW_nominal = 40000
"Nominal pressure";
parameter Integer numChi=1 "Number of chillers";
Buildings.Fluid.Sources.Boundary_pT sin1(
redeclare package Medium = MediumCW)
"Sink on medium 1 side";
Fluid.Sources.Boundary_pT sou1(
p=MediumCW.p_default + 45E3,
use_T_in=true,
redeclare package Medium = MediumCW,
T=298.15)
"Source on medium 1 side";
Modelica.Blocks.Sources.TimeTable TCon_in(
table=[0,273.15 + 12.78;
7200,273.15 + 12.78;
7200,273.15 + 18.33;
14400,273.15 + 18.33;
14400,273.15 + 26.67],
offset=0,
startTime=0)
"Condenser inlet temperature";
Buildings.Fluid.Sources.Boundary_pT sin2(
nPorts=1,
redeclare package Medium = MediumCHW)
"Sink on medium 2 side";
Modelica.Blocks.Sources.Constant TEva_in(k=273.15 + 25.28)
"Evaporator inlet temperature";
Modelica.Blocks.Sources.Constant TSet(
k(unit="K",displayUnit="degC")=273.15+15.56)
"Leaving chilled water temperature setpoint";
Buildings.Fluid.Sensors.TemperatureTwoPort TSup1(redeclare package Medium =
MediumCHW, m_flow_nominal=mCHW_flow_nominal) "Temperature sensor";
Modelica.Blocks.Sources.BooleanStep onChi(startTime=7200)
"On and off signal for the chiller";
Modelica.Blocks.Sources.BooleanStep onWSE(startTime=14400, startValue=true)
"On and off signal for the WSE";
equation
connect(TCon_in.y,sou1. T_in);
connect(sin2.ports[1], TSup1.port_b);
end PartialPlant;