Buildings.Fluid.Chillers.ModularReversible.Validation
Package for model validation
Information
This package contains models that validate the modular reversible chiller models using comparative validation against the Carnot model: Buildings.Fluid.Chillers.Examples.Carnot_y
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
Package Content
| Name | Description |
|---|---|
 Carnot_y
|
Example using the Carnot model approach |
| ConstantCarnotEffectiveness
|
Validation case for modular Carnot approach |
| TableData2D
|
Validation case for table data approach |
 BaseClasses
|
Package with partial validation models |
Buildings.Fluid.Chillers.ModularReversible.Validation.Carnot_y
Example using the Carnot model approach
Information
Validation case for Buildings.Fluid.Chillers.Carnot_y, duplicate of the example Buildings.Fluid.Chillers.Examples.Carnot_y.
Extends from Buildings.Fluid.HeatPumps.ModularReversible.Validation.Comparative.BaseClasses.PartialComparison (Partial model to allow heat pump and chiller model comparison), Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| HeatFlowRate | QUse_flow_nominal | 30E3 | Nominal capacity [W] |
| TemperatureDifference | dTEva_nominal | 10 | Temperature difference evaporator outlet-inlet [K] |
| TemperatureDifference | dTCon_nominal | 10 | Temperature difference condenser outlet-inlet [K] |
| Pressure | dp1_nominal | 6000 | Pressure difference over condenser [Pa] |
| Pressure | dp2_nominal | 6000 | Pressure difference over evaporator [Pa] |
| Real | etaCarnot_nominal | 0.3 | Carnot effectiveness (=COP/COP_Carnot) used during simulation if use_eta_Carnot_nominal = true |
| Time | tau1 | 60 | Time constant at nominal flow rate (used if energyDynamics1 <> Modelica.Fluid.Types.Dynamics.SteadyState) [s] |
| Temperature | T1_start | 303.15 | Initial or guess value of set point [K] |
| Time | tau2 | 60 | Time constant at nominal flow rate (used if energyDynamics2 <> Modelica.Fluid.Types.Dynamics.SteadyState) [s] |
| Temperature | T2_start | 278.15 | Initial or guess value of set point [K] |
| Temperature | TConIn_nominal | 303.15 | Nominal condenser inlet temperature [K] |
| Temperature | TEvaIn_nominal | 288.15 | Nominal condenser inlet temperature [K] |
| Temperature | TCon_nominal | TConIn_nominal + dTCon_nominal | Nominal condenser temperature [K] |
| Temperature | TEva_nominal | TEvaIn_nominal - dTEva_nominal | Nominal evaporator temperature [K] |
| MassFlowRate | m2_flow_nominal | chi.m2_flow_nominal | Nominal mass flow rate at chilled water side [kg/s] |
| MassFlowRate | m1_flow_nominal | chi.m1_flow_nominal | Nominal mass flow rate at condenser water wide [kg/s] |
Modelica definition
model Carnot_y "Example using the Carnot model approach"
extends Buildings.Fluid.HeatPumps.ModularReversible.Validation.Comparative.BaseClasses.PartialComparison(
m1_flow_nominal=chi.m1_flow_nominal,
m2_flow_nominal=chi.m2_flow_nominal,
sin2(nPorts=1),
sou2(nPorts=1),
sin1(nPorts=1),
sou1(nPorts=1));
extends Modelica.Icons.Example;
Buildings.Fluid.Chillers.Carnot_y chi(
redeclare package Medium1 = Medium1,
redeclare package Medium2 = Medium2,
etaCarnot_nominal=etaCarnot_nominal,
TCon_nominal=TCon_nominal,
TEva_nominal=TEva_nominal,
tau1=tau1,
tau2=tau2,
P_nominal=QUse_flow_nominal/chi.COP_nominal,
dTEva_nominal=-dTEva_nominal,
dTCon_nominal=dTCon_nominal,
use_eta_Carnot_nominal=false,
dp1_nominal=dp1_nominal,
dp2_nominal=dp2_nominal,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
show_T=true,
T1_start=T1_start,
T2_start=T2_start)
"Chiller model";
equation
connect(sin2.ports[1], chi.port_b2);
connect(chi.port_a2, sou2.ports[1]);
connect(chi.port_b1, sin1.ports[1]);
connect(chi.port_a1, sou1.ports[1]);
connect(chi.y, uCom.y);
end Carnot_y;
Buildings.Fluid.Chillers.ModularReversible.Validation.ConstantCarnotEffectiveness
Validation case for modular Carnot approach
Information
Validation case for Buildings.Fluid.Chillers.ModularReversible.RefrigerantCycle.ConstantCarnotEffectiveness.
Extends from BaseClasses.PartialModularComparison (Partial model for comparison to the Carnot model), Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| HeatFlowRate | QUse_flow_nominal | 30E3 | Nominal capacity [W] |
| TemperatureDifference | dTEva_nominal | 10 | Temperature difference evaporator outlet-inlet [K] |
| TemperatureDifference | dTCon_nominal | 10 | Temperature difference condenser outlet-inlet [K] |
| Pressure | dp1_nominal | 6000 | Pressure difference over condenser [Pa] |
| Pressure | dp2_nominal | 6000 | Pressure difference over evaporator [Pa] |
| Real | etaCarnot_nominal | 0.3 | Carnot effectiveness (=COP/COP_Carnot) used during simulation if use_eta_Carnot_nominal = true |
| Time | tau1 | 60 | Time constant at nominal flow rate (used if energyDynamics1 <> Modelica.Fluid.Types.Dynamics.SteadyState) [s] |
| Temperature | T1_start | 303.15 | Initial or guess value of set point [K] |
| Time | tau2 | 60 | Time constant at nominal flow rate (used if energyDynamics2 <> Modelica.Fluid.Types.Dynamics.SteadyState) [s] |
| Temperature | T2_start | 278.15 | Initial or guess value of set point [K] |
| Temperature | TConIn_nominal | 303.15 | Nominal condenser inlet temperature [K] |
| Temperature | TEvaIn_nominal | 288.15 | Nominal condenser inlet temperature [K] |
| Temperature | TCon_nominal | TConIn_nominal + dTCon_nominal | Nominal condenser temperature [K] |
| Temperature | TEva_nominal | TEvaIn_nominal - dTEva_nominal | Nominal evaporator temperature [K] |
| MassFlowRate | m2_flow_nominal | chi.mEva_flow_nominal | Nominal mass flow rate at chilled water side [kg/s] |
| MassFlowRate | m1_flow_nominal | chi.mCon_flow_nominal | Nominal mass flow rate at condenser water wide [kg/s] |
Modelica definition
model ConstantCarnotEffectiveness
"Validation case for modular Carnot approach"
extends BaseClasses.PartialModularComparison(chi(redeclare model
RefrigerantCycleChillerCooling =
Buildings.Fluid.Chillers.ModularReversible.RefrigerantCycle.ConstantCarnotEffectiveness
(etaCarnot_nominal=etaCarnot_nominal)));
extends Modelica.Icons.Example;
end ConstantCarnotEffectiveness;
Buildings.Fluid.Chillers.ModularReversible.Validation.TableData2D
Validation case for table data approach
Information
Validation case for Buildings.Fluid.Chillers.ModularReversible.RefrigerantCycle.TableData2D.
Extends from BaseClasses.PartialModularComparison (Partial model for comparison to the Carnot model), Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| HeatFlowRate | QUse_flow_nominal | 30E3 | Nominal capacity [W] |
| TemperatureDifference | dTEva_nominal | 10 | Temperature difference evaporator outlet-inlet [K] |
| TemperatureDifference | dTCon_nominal | 10 | Temperature difference condenser outlet-inlet [K] |
| Pressure | dp1_nominal | 6000 | Pressure difference over condenser [Pa] |
| Pressure | dp2_nominal | 6000 | Pressure difference over evaporator [Pa] |
| Real | etaCarnot_nominal | 0.3 | Carnot effectiveness (=COP/COP_Carnot) used during simulation if use_eta_Carnot_nominal = true |
| Time | tau1 | 60 | Time constant at nominal flow rate (used if energyDynamics1 <> Modelica.Fluid.Types.Dynamics.SteadyState) [s] |
| Temperature | T1_start | 303.15 | Initial or guess value of set point [K] |
| Time | tau2 | 60 | Time constant at nominal flow rate (used if energyDynamics2 <> Modelica.Fluid.Types.Dynamics.SteadyState) [s] |
| Temperature | T2_start | 278.15 | Initial or guess value of set point [K] |
| Temperature | TConIn_nominal | 303.15 | Nominal condenser inlet temperature [K] |
| Temperature | TEvaIn_nominal | 288.15 | Nominal condenser inlet temperature [K] |
| Temperature | TCon_nominal | TConIn_nominal | Nominal condenser temperature [K] |
| Temperature | TEva_nominal | TEvaIn_nominal | Nominal evaporator temperature [K] |
| MassFlowRate | m2_flow_nominal | chi.mEva_flow_nominal | Nominal mass flow rate at chilled water side [kg/s] |
| MassFlowRate | m1_flow_nominal | chi.mCon_flow_nominal | Nominal mass flow rate at condenser water wide [kg/s] |
Modelica definition
model TableData2D "Validation case for table data approach"
extends BaseClasses.PartialModularComparison(
TEva_nominal=TEvaIn_nominal,
TCon_nominal=TConIn_nominal,
chi(redeclare model RefrigerantCycleChillerCooling =
Buildings.Fluid.Chillers.ModularReversible.RefrigerantCycle.TableData2D (
datTab(
tabPEle=[0,293.15,303.15; 288.15,14122.8,14122.8; 298.15,14122.8,14122.8],
mCon_flow_nominal=m1_flow_nominal,
mEva_flow_nominal=m2_flow_nominal,
dpCon_nominal=0,
dpEva_nominal=0,
devIde="CarnotTableData",
use_TEvaOutForTab=false,
use_TConOutForTab=false,
tabQEva_flow=[0,293.15,303.15; 288.15,-35499.7,-30000; 298.15,0,-36220.8],
tabLowBou=[273.15,273.15; 273.15,273.15],
use_TEvaOutForOpeEnv=false,
use_TConOutForOpeEnv=false))));
extends Modelica.Icons.Example;
end TableData2D;