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model tank_model
package Medium = Modelica.Media.Water.ConstantPropertyLiquidWater;
Modelica.Fluid.Examples.ControlledTankSystem.Utilities.TankController
tankController(
waitTime=50,
maxLevel=0.9*tank1.height,
minLevel=0.01)
annotation (Placement(transformation(extent={{-60,-20},{-20,20}})));
Modelica.Fluid.Examples.ControlledTankSystem.Utilities.RadioButton start(
reset={stop.on,shut.on},
buttonTimeTable={20,280})
annotation (Placement(transformation(extent={{-100,20},{-80,40}})));
Modelica.Fluid.Examples.ControlledTankSystem.Utilities.RadioButton stop(
reset={start.on,shut.on},
buttonTimeTable={220,650})
annotation (Placement(transformation(extent={{-100,-10},{-80,10}})));
Modelica.Fluid.Examples.ControlledTankSystem.Utilities.RadioButton shut(
reset={start.on,stop.on},
buttonTimeTable={700})
annotation (Placement(transformation(extent={{-100,-40},{-80,-20}})));
Modelica.Fluid.Valves.ValveDiscrete valve1( redeclare
package Medium = Medium,
m_flow_nominal=40,
dp_nominal=100000)
annotation (Placement(transformation(
origin={-10,70},
extent={{10,-10},{-10,10}},
rotation=180)));
Modelica.Fluid.Vessels.OpenTank tank1(
level_start=0.05,
redeclare package Medium = Medium,
crossArea=6,
height=4,
nPorts=2,
portsData={Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(
diameter=0.2,
height=4,
zeta_out=0,
zeta_in=1),Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(
diameter=0.2,
height=0,
zeta_out=0,
zeta_in=1)}) annotation (Placement(transformation(extent={{10,30},
{50,70}})));
Modelica.Blocks.Sources.RealExpression level1(y=tank1.level)
annotation (Placement(transformation(extent={{-90,-60},{-55,-40}})));
Modelica.Fluid.Valves.ValveDiscrete valve2( redeclare package Medium
= Medium,
dp_nominal(displayUnit="Pa") = 1,
m_flow_nominal=100)
annotation (Placement(transformation(
origin={34,0},
extent={{10,-10},{-10,10}},
rotation=90)));
Modelica.Fluid.Valves.ValveDiscrete valve3( redeclare package Medium
= Medium,
dp_nominal(displayUnit="Pa") = 1,
m_flow_nominal=10)
annotation (Placement(transformation(
origin={35,-80},
extent={{10,-10},{-10,10}})));
Modelica.Fluid.Vessels.OpenTank tank2(
level_start=0.05,
redeclare package Medium = Medium,
height=5,
crossArea=6,
nPorts=2,
portsData={Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(
diameter=0.2,
height=5,
zeta_out=0,
zeta_in=1),Modelica.Fluid.Vessels.BaseClasses.VesselPortsData(
diameter=0.2,
height=0,
zeta_out=0,
zeta_in=1)}) annotation (Placement(transformation(extent={{50,-60},
{90,-20}})));
Modelica.Fluid.Sources.Boundary_pT ambient1(redeclare package Medium =
Medium,nPorts=1,
p=system.p_ambient,
T=system.T_ambient)
annotation (Placement(transformation(extent={{-10,-90},{10,-70}})));
Modelica.Blocks.Sources.RealExpression level2(y=tank2.level)
annotation (Placement(transformation(extent={{-70,-80},{-33,-60}})));
Modelica.Fluid.Sources.Boundary_pT source(redeclare package Medium =
Medium, p=2.5e6,nPorts=1,
T=system.T_ambient)
annotation (Placement(transformation(
origin={-40,70},
extent={{-10,-10},{10,10}})));
inner Modelica.Fluid.System system(energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial)
annotation (Placement(transformation(extent={{-90,70},
{-70,90}})));
equation
connect(shut.on, tankController.shut) annotation (Line(points={{-79,-30},{
-72,-30},{-72,-12},{-62,-12}}, color={255,0,255}));
connect(stop.on, tankController.stop) annotation (Line(points={{-79,0},{-62,
0}}, color={255,0,255}));
connect(start.on, tankController.start) annotation (Line(points={{-79,30},{
-70,30},{-70,12},{-62,12}}, color={255,0,255}));
connect(tankController.valve1, valve1.open) annotation (Line(points={{-19,12},
{-10,12},{-10,62}}, color={255,0,255}));
connect(level1.y, tankController.level1) annotation (Line(points={{-53.25,
-50},{-52,-50},{-52,-22}}, color={0,0,127}));
connect(tankController.valve2, valve2.open) annotation (Line(points={{-19,0},
{-5,0},{26,0}}, color={255,0,255}));
connect(tankController.valve3, valve3.open) annotation (Line(points={{-19,-12},
{-10,-12},{-10,-50},{35,-50},{35,-72}},
color={255,0,255}));
connect(level2.y, tankController.level2) annotation (Line(points={{-31.15,
-70},{-28,-70},{-28,-22}}, color={0,0,127}));
connect(source.ports[1], valve1.port_a) annotation (Line(
points={{-30,70},{-20,70}},
color={0,127,255}));
connect(valve3.port_b, ambient1.ports[1]) annotation (Line(
points={{25,-80},{10,-80}},
color={0,127,255}));
connect(tank2.ports[2], valve3.port_a) annotation (Line(
points={{74,-60},{74,-80},{45,-80}},
color={0,127,255}));
connect(valve2.port_b, tank2.ports[1]) annotation (Line(
points={{34,-10},{34,-20},{50,-20},{50,-60},{66,-60}},
color={0,127,255}));
connect(valve1.port_b, tank1.ports[1]) annotation (Line(
points={{0,70},{10,70},{10,30},{26,30}},
color={0,127,255}));
connect(tank1.ports[2], valve2.port_a) annotation (Line(
points={{34,30},{34,10}},
color={0,127,255}));
annotation (
experiment(StopTime=900),
Documentation(info="<html>
<p>
With this example, the controller of a tank filling/emptying system
is demonstrated.
</p>
<p>
The basic operation is to fill and empty the two tanks:
</p>
<ol>
<li> Valve 1 is opened and tank 1 is filled.</li>
<li> When tank 1 reaches its fill level limit,
valve 1 is closed. </li>
<li> After a waiting time, valve 2 is
opened and the fluid flows from tank 1 into tank 2.</li>
<li> When tank 1 reaches its minimum level, valve 2 is closed. </li>
<li> After a waiting time, valve 3 is opened and
the fluid flows out of tank 2</li>
<li> When tank 2 reaches its minimum level, valve 3 is closed</li>
</ol>
<p>
The above \"normal\" process can be influenced by three
buttons:
</p>
<ul>
<li> Button <b>start</b> starts the above process.
When this button is pressed after a \"stop\" or
\"shut\" operation, the process operation continues.
</li>
<li> Button <b>stop</b> stops the above process by
closing all valves. Then, the controller waits for
further input (either \"start\" or \"shut\" operation).</li>
<li> Button <b>shut</b> is used to shutdown the process,
by emptying at once both tanks by opening valve 2 and
valve 3. When this is achieved,
the process goes back to its start configuration
where all 3 valves are closed.
Clicking on \"start\", restarts the process.</li>
</ul>
<p>
The demo-run uses the following button presses:
</p>
<ul>
<li> Button <b>start</b> pressed at 20 s.</li>
<li> Button <b>stop</b> pressed at 220 s </li>
<li> Button <b>start</b> pressed at 280 s </li>
<li> Button <b>stop</b> pressed at 650 s </li>
<li> Button <b>shut</b> pressed at 700 s </li>
<li> Simulate for 900 s</li>
</ul>
<p>
This example is based on
</p>
<dl>
<dt>Dressler I. (2004):</dt>
<dd> <b>Code Generation From JGrafchart to Modelica</b>.
Master thesis, supervisor: Karl-Erik Arzen,
Department of Automatic Control, Lund Institute of Technology,
Lund, Sweden, March 30, 2004<br> </dd>
</dl>
<img src=\"modelica://Modelica/Resources/Images/Fluid/Examples/ControlledTanks.png\" border=\"1\"
alt=\"ControlledTanks.png\">
</html>"),
__Dymola_Commands(file=
"modelica://Modelica/Resources/Scripts/Dymola/Fluid/ControlledTanks/plot level and ports.m_flow.mos"
"plot level and ports.m_flow"));
end tank_model;
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