Collection of models that illustrate model use and test models
Information
This package contains examples for the use of models that can be found in
Buildings.Fluid.HeatExchangers.BaseClasses.
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
Package Content
Test model for the functions epsilon_ntuZ and ntu_epsilonZ
Information
Model to test the implementation of the epsilon-NTU functions and their inverse functions.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
model EpsilonNTUZ
"Test model for the functions epsilon_ntuZ and ntu_epsilonZ"
extends Modelica.Icons.Example;
import f =
Buildings.Fluid.Types.HeatExchangerFlowRegime;
Real epsilon[5]
"Heat exchanger effectiveness";
Real eps[5]
"Heat exchanger effectiveness";
Real Z[5]
"Ratio of capacity flow rates";
Real ntu[5]
"Number of transfer units";
Real diff[5]
"Difference in results";
equation
for conf
in {f.ParallelFlow,
f.CounterFlow,
f.CrossFlowUnmixed,
f.CrossFlowCMinMixedCMaxUnmixed,
f.CrossFlowCMinUnmixedCMaxMixed}
loop
Z[conf] =
abs(
cos(time));
epsilon[conf] = 0.01 + 0.98*
abs(
sin(time)) * 1/(1+Z[conf]);
ntu[conf] =
ntu_epsilonZ(epsilon[conf], Z[conf], conf);
eps[conf] =
epsilon_ntuZ(ntu[conf], Z[conf], conf);
diff[conf] = epsilon[conf] - eps[conf];
assert(
abs(diff[conf]) < 1E-10, "Check model implementation for bugs.");
end for;
end EpsilonNTUZ;
Test model for HACoilInside
Information
Test model for
Buildings.Fluid.HeatExchanger.BaseClassess.HACoilInside.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
Test model for natural convection outside of a coil
Information
Test model for
Buildings.Fluid.HeatExchangers.BaseClasses.HANaturalCylinder.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
model HANaturalCylinder
"Test model for natural convection outside of a coil"
extends Modelica.Icons.Example;
Buildings.Fluid.HeatExchangers.BaseClasses.HANaturalCylinder hANatCyl(
redeclare
package Medium =
Buildings.Media.ConstantPropertyLiquidWater, ChaLen=0.1,
hA_nominal=10,
TFlu_nominal=293.15,
TSur_nominal=313.15)
"Calculates an hA value for natural convection around a cylinder";
Modelica.Blocks.Sources.Ramp TSur(
duration=100,
height=50,
offset=293.15)
"Temperature of the pipe surface";
Modelica.Blocks.Sources.Ramp TFlu(
duration=100,
startTime=150,
height=50,
offset=293.15)
"Temperature of the surrounding fluid";
equation
connect(TSur.y, hANatCyl.TSur);
connect(TFlu.y, hANatCyl.TFlu);
end HANaturalCylinder;
Model that tests the basic element that is used to built heat exchanger models
Information
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
model HexElementLatent
"Model that tests the basic element that is used to built heat exchanger models"
extends Modelica.Icons.Example;
package Medium_W =
Buildings.Media.ConstantPropertyLiquidWater;
package Medium_A =
Buildings.Media.PerfectGases.MoistAirUnsaturated;
Buildings.Fluid.Sources.Boundary_pT sin_2(
redeclare package Medium = Medium_A,
use_p_in=true,
use_T_in=true,
T=288.15,
nPorts=1);
Modelica.Blocks.Sources.Ramp PIn(
height=20,
duration=300,
startTime=300,
offset=101325);
Buildings.Fluid.Sources.Boundary_pT sou_2(
redeclare package Medium = Medium_A,
use_p_in=true,
use_T_in=true,
T=283.15,
nPorts=1);
Modelica.Blocks.Sources.Ramp TWat(
startTime=1,
height=4,
duration=300,
offset=303.15)
"Water temperature";
Modelica.Blocks.Sources.Constant TDb(k=278.15)
"Drybulb temperature";
Modelica.Blocks.Sources.Constant POut(k=101325);
Buildings.Fluid.Sources.Boundary_pT sin_1(
redeclare package Medium = Medium_W,
use_p_in=true,
T=288.15,
nPorts=1);
Buildings.Fluid.Sources.Boundary_pT sou_1(
redeclare package Medium = Medium_W,
use_T_in=true,
nPorts=1,
p=101340,
T=293.15);
Fluid.FixedResistances.FixedResistanceDpM res_22(
m_flow_nominal=5,
dp_nominal=5,
redeclare package Medium = Medium_A);
Fluid.FixedResistances.FixedResistanceDpM res_12(
m_flow_nominal=5,
dp_nominal=5,
redeclare package Medium = Medium_W);
Buildings.Fluid.HeatExchangers.BaseClasses.HexElementLatent hex(
m1_flow_nominal=5,
m2_flow_nominal=5,
UA_nominal=9999,
redeclare package Medium1 = Medium_W,
redeclare package Medium2 = Medium_A,
dp1_nominal=5,
dp2_nominal=5,
energyDynamics1=Modelica.Fluid.Types.Dynamics.FixedInitial,
energyDynamics2=Modelica.Fluid.Types.Dynamics.FixedInitial,
energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyStateInitial);
Modelica.Blocks.Sources.Constant TDb1(k=303.15)
"Drybulb temperature";
Fluid.FixedResistances.FixedResistanceDpM res_11(
m_flow_nominal=5,
dp_nominal=5,
redeclare package Medium = Medium_W);
Fluid.FixedResistances.FixedResistanceDpM res_21(
m_flow_nominal=5,
dp_nominal=5,
redeclare package Medium = Medium_A);
Modelica.Blocks.Sources.Constant hACon(k=10000)
"Convective heat transfer";
inner Modelica.Fluid.System system;
equation
connect(TDb.y, sou_1.T_in);
connect(POut.y, sin_1.p_in);
connect(PIn.y, sou_2.p_in);
connect(TWat.y, sou_2.T_in);
connect(POut.y, sin_2.p_in);
connect(hex.port_b1, res_12.port_a);
connect(res_22.port_a, hex.port_b2);
connect(TDb1.y, sin_2.T_in);
connect(res_11.port_b, hex.port_a1);
connect(hex.port_a2, res_21.port_b);
connect(hACon.y, hex.Gc_1);
connect(hACon.y, hex.Gc_2);
connect(sou_2.ports[1], res_21.port_a);
connect(sin_1.ports[1], res_12.port_b);
connect(sou_1.ports[1], res_11.port_a);
connect(sin_2.ports[1], res_22.port_b);
end HexElementLatent;
Model that tests the basic element that is used to built heat exchanger models
Information
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
model HexElementSensible
"Model that tests the basic element that is used to built heat exchanger models"
extends Modelica.Icons.Example;
package Medium_W =
Buildings.Media.ConstantPropertyLiquidWater;
package Medium_A =
Buildings.Media.PerfectGases.MoistAirUnsaturated;
Buildings.Fluid.Sources.Boundary_pT sin_2(
redeclare package Medium = Medium_A,
use_p_in=true,
use_T_in=true,
T=288.15,
nPorts=1);
Modelica.Blocks.Sources.Ramp PIn(
height=20,
duration=300,
startTime=300,
offset=101325);
Buildings.Fluid.Sources.Boundary_pT sou_2(
redeclare package Medium = Medium_A,
use_p_in=true,
use_T_in=true,
T=283.15,
nPorts=1);
Modelica.Blocks.Sources.Ramp TWat(
startTime=1,
height=4,
duration=300,
offset=303.15)
"Water temperature";
Modelica.Blocks.Sources.Constant TDb(k=278.15)
"Drybulb temperature";
Modelica.Blocks.Sources.Constant POut(k=101325);
Buildings.Fluid.Sources.Boundary_pT sin_1(
redeclare package Medium = Medium_W,
use_p_in=true,
T=288.15,
nPorts=1);
Buildings.Fluid.Sources.Boundary_pT sou_1(
redeclare package Medium = Medium_W,
use_T_in=true,
nPorts=1,
p=101340,
T=293.15);
Fluid.FixedResistances.FixedResistanceDpM res_22(
m_flow_nominal=5,
dp_nominal=5,
redeclare package Medium = Medium_A);
Fluid.FixedResistances.FixedResistanceDpM res_12(
m_flow_nominal=5,
dp_nominal=5,
redeclare package Medium = Medium_W);
Buildings.Fluid.HeatExchangers.BaseClasses.HexElementSensible hex(
m1_flow_nominal=5,
m2_flow_nominal=5,
UA_nominal=9999,
redeclare package Medium1 = Medium_W,
redeclare package Medium2 = Medium_A,
dp1_nominal=5,
dp2_nominal=5,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
energyDynamics1=Modelica.Fluid.Types.Dynamics.FixedInitial,
energyDynamics2=Modelica.Fluid.Types.Dynamics.FixedInitial);
Modelica.Blocks.Sources.Constant TDb1(k=303.15)
"Drybulb temperature";
Fluid.FixedResistances.FixedResistanceDpM res_11(
m_flow_nominal=5,
dp_nominal=5,
redeclare package Medium = Medium_W);
Fluid.FixedResistances.FixedResistanceDpM res_21(
m_flow_nominal=5,
dp_nominal=5,
redeclare package Medium = Medium_A);
Modelica.Blocks.Sources.Constant hACon(k=10000)
"Convective heat transfer";
inner Modelica.Fluid.System system;
equation
connect(TDb.y, sou_1.T_in);
connect(POut.y, sin_1.p_in);
connect(PIn.y, sou_2.p_in);
connect(TWat.y, sou_2.T_in);
connect(POut.y, sin_2.p_in);
connect(hex.port_b1, res_12.port_a);
connect(res_22.port_a, hex.port_b2);
connect(TDb1.y, sin_2.T_in);
connect(res_11.port_b, hex.port_a1);
connect(hex.port_a2, res_21.port_b);
connect(hACon.y, hex.Gc_1);
connect(hACon.y, hex.Gc_2);
connect(sou_2.ports[1], res_21.port_a);
connect(sin_1.ports[1], res_12.port_b);
connect(sou_1.ports[1], res_11.port_a);
connect(sin_2.ports[1], res_22.port_b);
end HexElementSensible;
Test model for coil manifold
Information
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
Type | Name | Default | Description |
Integer | nPipPar | 3 | Number of parallel pipes |
Integer | nPipSeg | 4 | Number of pipe segments |
Modelica definition
model Manifold
"Test model for coil manifold"
package Medium =
Buildings.Media.ConstantPropertyLiquidWater;
extends Modelica.Icons.Example;
parameter Integer nPipPar = 3
"Number of parallel pipes";
parameter Integer nPipSeg = 4
"Number of pipe segments";
Modelica.Blocks.Sources.Constant POut(k=101325);
Buildings.Fluid.Sources.Boundary_pT sin_1(
redeclare
package Medium = Medium,
use_p_in=true,
T=283.15,
nPorts=2);
Buildings.Fluid.Sources.Boundary_pT sou_1(
redeclare package Medium = Medium,
use_p_in=true,
use_T_in=true,
p=101335,
T=293.15,
nPorts=2);
Fluid.FixedResistances.FixedResistanceDpM res_1(
m_flow_nominal=5,
redeclare package Medium = Medium,
dp_nominal=10,
use_dh=true,
from_dp=false);
Buildings.Fluid.Sensors.MassFlowRate[nPipPar] mfr_1(
redeclare each package
Medium = Medium);
Modelica.Blocks.Sources.Ramp TDb(
height=1,
duration=1,
offset=293.15);
Modelica.Blocks.Sources.Ramp P(
duration=1,
height=40,
offset=101305);
Buildings.Fluid.HeatExchangers.BaseClasses.PipeManifoldFixedResistance
pipFixRes_1(
redeclare package Medium = Medium,
nPipPar=nPipPar,
m_flow_nominal=5,
dp_nominal=10,
linearized=false,
mStart_flow_a=5);
Buildings.Fluid.HeatExchangers.BaseClasses.PipeManifoldNoResistance
pipNoRes_1(
redeclare package Medium = Medium, nPipPar=nPipPar,
mStart_flow_a=5);
Fluid.FixedResistances.FixedResistanceDpM res_2(
m_flow_nominal=5,
redeclare package Medium = Medium,
dp_nominal=10,
use_dh=true,
from_dp=false);
Buildings.Fluid.Sensors.MassFlowRate[nPipPar, nPipSeg] mfr_2(
redeclare each
package Medium =
Medium);
Buildings.Fluid.HeatExchangers.BaseClasses.DuctManifoldFixedResistance
ducFixRes_2(
redeclare package Medium = Medium,
nPipPar=nPipPar,
nPipSeg=nPipSeg,
m_flow_nominal=5,
linearized=false,
mStart_flow_a=5,
dp_nominal=10,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial);
Buildings.Fluid.HeatExchangers.BaseClasses.DuctManifoldNoResistance
ducNoRes_2(
redeclare package Medium = Medium,
nPipPar=nPipPar,
nPipSeg=nPipSeg,
mStart_flow_a=5);
Buildings.Fluid.HeatExchangers.BaseClasses.CoilHeader hea1(
redeclare package Medium = Medium,
nPipPar=nPipPar,
mStart_flow_a=5)
"Header for water-side heat exchanger register";
Buildings.Fluid.HeatExchangers.BaseClasses.CoilHeader hea2(
redeclare package Medium = Medium,
nPipPar=nPipPar,
mStart_flow_a=5)
"Header for water-side heat exchanger register";
inner Modelica.Fluid.System system;
equation
connect(POut.y, sin_1.p_in);
connect(TDb.y, sou_1.T_in);
connect(P.y, sou_1.p_in);
connect(res_1.port_a, pipNoRes_1.port_a);
connect(res_2.port_a,ducNoRes_2. port_a);
connect(pipFixRes_1.port_b, hea1.port_a);
connect(hea1.port_b, mfr_1.port_a);
connect(mfr_1.port_b, hea2.port_a);
connect(hea2.port_b, pipNoRes_1.port_b);
connect(ducFixRes_2.port_b, mfr_2.port_a);
connect(mfr_2.port_b, ducNoRes_2.port_b);
connect(sou_1.ports[1], pipFixRes_1.port_a);
connect(sou_1.ports[2], ducFixRes_2.port_a);
connect(sin_1.ports[1], res_1.port_b);
connect(sin_1.ports[2], res_2.port_b);
end Manifold;
Test model for latent heat exchange
Information
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
Test model for RayleighNumber
Information
Test model for
Buildings.Fluid.HeatExchangers.BaseClasses.RayleighNumber.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Modelica definition
Automatically generated Thu Jun 19 10:56:34 2014.