-
Notifications
You must be signed in to change notification settings - Fork 158
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Issue3027 wet coil sensible heat (#3049)
* Added test case from #3043 Files were added manually to exclude the large file Buildings/Resources/Data/Fluid/HeatExchangers/Examples/WetCoilCounterFlowPescribedBoundary.dat * Simplified example * Avoided division by zero if nEle=1 * Updated reference results for #3027
- Loading branch information
Showing
19 changed files
with
313 additions
and
117 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
139 changes: 139 additions & 0 deletions
139
Buildings/Fluid/HeatExchangers/Validation/WetCoilCounterFlowLowWaterFlowRate.mo
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| within Buildings.Fluid.HeatExchangers.Validation; | ||
| model WetCoilCounterFlowLowWaterFlowRate | ||
| "Model that tests a heat exchanger with prescribed boundary conditions, in terms of properties of inlet water and inlet air" | ||
| extends Modelica.Icons.Example; | ||
| package Medium1 = Buildings.Media.Water | ||
| "Medium model for water"; | ||
| package Medium2 = Buildings.Media.Air | ||
| "Medium model for air"; | ||
|
|
||
| parameter Modelica.Units.SI.MassFlowRate mWat_flow_nominal=0.44732114 | ||
| "Nominal mass flow rate"; | ||
| parameter Modelica.Units.SI.MassFlowRate mAir_flow_nominal=0.65844 | ||
| "Nominal mass flow rate"; | ||
|
|
||
| Buildings.Fluid.HeatExchangers.WetCoilCounterFlow | ||
| hex( | ||
| redeclare package Medium1 = Medium1, | ||
| redeclare package Medium2 = Medium2, | ||
| m1_flow_nominal=mWat_flow_nominal, | ||
| m2_flow_nominal=mAir_flow_nominal, | ||
| dp2_nominal(displayUnit="Pa") = 200, | ||
| dp1_nominal(displayUnit="Pa") = 3000, | ||
| UA_nominal=mWat_flow_nominal*4200*10/30, | ||
| show_T=true, | ||
| nEle=1, | ||
| energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial) | ||
| "Cooling coil" | ||
| annotation(Placement(transformation(extent={{10,-12},{30,8}}))); | ||
| Buildings.Fluid.Sources.MassFlowSource_T sou_w( | ||
| redeclare package Medium = Medium1, | ||
| use_Xi_in=false, | ||
| m_flow=1E-4*mWat_flow_nominal, | ||
| use_T_in=false, | ||
| T=282.15, | ||
| nPorts=1, | ||
| use_m_flow_in=true) | ||
| "Source for water" | ||
| annotation (Placement(transformation(extent={{-58,10},{-38,30}}))); | ||
| Buildings.Fluid.Sources.Boundary_pT sin_w( | ||
| redeclare package Medium = Medium1, | ||
| use_p_in=false, | ||
| T=293.15, | ||
| nPorts=1) | ||
| "sink for water" | ||
| annotation (Placement(transformation(extent={{90,10},{70,30}}))); | ||
| Buildings.Fluid.Sources.MassFlowSource_T sou_a( | ||
| use_Xi_in=false, | ||
| X={0.01,0.99}, | ||
| m_flow=0.3*mAir_flow_nominal, | ||
| use_T_in=false, | ||
| T=285.15, | ||
| nPorts=1, | ||
| redeclare package Medium = Medium2, | ||
| use_m_flow_in=false) | ||
| "Source for air" | ||
| annotation (Placement(transformation(extent={{90,-50},{70,-30}}))); | ||
| Buildings.Fluid.Sources.Boundary_pT sin_a( | ||
| redeclare package Medium = Medium2, | ||
| use_p_in=false, | ||
| T=293.15, | ||
| nPorts=1) | ||
| "sink for air" | ||
| annotation (Placement(transformation(extent={{-60,-50},{-40,-30}}))); | ||
| Controls.OBC.CDL.Continuous.Sources.Ramp ram( | ||
| height=-mWat_flow_nominal, | ||
| duration=1800, | ||
| offset=mWat_flow_nominal, | ||
| startTime=900) | ||
| annotation (Placement(transformation(extent={{-92,18},{-72,38}}))); | ||
| Sensors.TemperatureTwoPort senTemWatIn( | ||
| redeclare package Medium = Medium1, | ||
| allowFlowReversal=false, | ||
| m_flow_nominal=mWat_flow_nominal, | ||
| tau=0) "Temperature sensor" | ||
| annotation (Placement(transformation(extent={{-30,10},{-10,30}}))); | ||
| Sensors.TemperatureTwoPort senTemWatOut( | ||
| redeclare package Medium = Medium1, | ||
| allowFlowReversal=false, | ||
| m_flow_nominal=mWat_flow_nominal, | ||
| tau=0) "Temperature sensor" | ||
| annotation (Placement(transformation(extent={{40,10},{60,30}}))); | ||
| Sensors.TemperatureTwoPort senTemAirIn( | ||
| redeclare package Medium = Medium2, | ||
| allowFlowReversal=false, | ||
| m_flow_nominal=mAir_flow_nominal, | ||
| tau=0) "Temperature sensor" | ||
| annotation (Placement(transformation(extent={{60,-50},{40,-30}}))); | ||
|
|
||
| Sensors.TemperatureTwoPort senTemAirOut( | ||
| redeclare package Medium = Medium2, | ||
| allowFlowReversal=false, | ||
| m_flow_nominal=mAir_flow_nominal, | ||
| tau=0) "Temperature sensor" | ||
| annotation (Placement(transformation(extent={{-10,-50},{-30,-30}}))); | ||
| equation | ||
| connect(sou_w.m_flow_in, ram.y) | ||
| annotation (Line(points={{-60,28},{-70,28}}, color={0,0,127})); | ||
| connect(sou_w.ports[1], senTemWatIn.port_a) | ||
| annotation (Line(points={{-38,20},{-30,20}}, color={0,127,255})); | ||
| connect(senTemWatIn.port_b, hex.port_a1) | ||
| annotation (Line(points={{-10,20},{0,20},{0,4},{10,4}}, | ||
| color={0,127,255})); | ||
| connect(sin_w.ports[1], senTemWatOut.port_b) | ||
| annotation (Line(points={{70,20},{60,20}}, color={0,127,255})); | ||
| connect(senTemWatOut.port_a, hex.port_b1) annotation (Line(points={{40,20},{34, | ||
| 20},{34,4},{30,4}}, color={0,127,255})); | ||
| connect(sou_a.ports[1], senTemAirIn.port_a) | ||
| annotation (Line(points={{70,-40},{60,-40}}, color={0,127,255})); | ||
| connect(senTemAirIn.port_b, hex.port_a2) annotation (Line(points={{40,-40},{34, | ||
| -40},{34,-8},{30,-8}}, color={0,127,255})); | ||
| connect(sin_a.ports[1], senTemAirOut.port_b) | ||
| annotation (Line(points={{-40,-40},{-30,-40}}, color={0,127,255})); | ||
| connect(senTemAirOut.port_a, hex.port_b2) annotation (Line(points={{-10,-40},{ | ||
| 0,-40},{0,-8},{10,-8}}, color={0,127,255})); | ||
| annotation ( | ||
| Icon(coordinateSystem(preserveAspectRatio=false)), | ||
| Diagram(coordinateSystem(preserveAspectRatio=false)), | ||
| experiment( | ||
| StopTime=3600, | ||
| Tolerance=1e-06), | ||
| __Dymola_Commands(file="modelica://Buildings/Resources/Scripts/Dymola/Fluid/HeatExchangers/Validation/WetCoilCounterFlowLowWaterFlowRate.mos" | ||
| "Simulate and plot"), | ||
| Documentation(info="<html> | ||
| <p> | ||
| This is a validation case in which the air flow rate is about a third of the design flow rate, | ||
| and the water mass flow rate is ramped to zero. | ||
| The validation verifies that the outlet temperatures approach the inlet temperature of the air. | ||
| </p> | ||
| </html>", revisions="<html> | ||
| <ul> | ||
| <li> | ||
| May 26, 2022, by Michael Wetter:<br/> | ||
| First implementation.<br/> | ||
| This is for | ||
| <a href=\"https://github.com/lbl-srg/modelica-buildings/issues/3027\">issue 3027</a>. | ||
| </li> | ||
| </ul> | ||
| </html>")); | ||
| end WetCoilCounterFlowLowWaterFlowRate; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.