Re: openmodelicainterest - once again the wrong email-adress ;(

Sun, 22 Jun 2008 08:23:03 -0700 


Hi Christian,

You are a member of the openmodelicainterest
with this email address, so you should be able
to send emails to the list. I got your latest
email sent to the list so it might have been
a glitch in the past.

More comments inline...

christian kunze wrote:

ya-hey!

plot problems
Von:
christian kunze <[EMAIL PROTECTED]>
Datum:
Thu, 29 May 2008 19:48:54 +0200
An:
[email protected]

ya-hey!
i have a little test-programm and with dymola i can plot for example "R_1_AW.Q_flow" and "R_Rest_AW.Q_flow" - but, if i use om 1.4.4 and let the simulation start, i get only: 


simulate(SimpeRoomR1, stopTime=8)


There is a typo in the name of the model!
The name of the model is called:
"SimpleRoomR1", but you tried to simulate "SimpeRoomR1".


record
    resultFile = "SimpeRoomR1_res.plt"
end record


plot(R_1_AW.Q_flow)

"Error reading the simulation result."
i use the same modelica librabry for both programms and checkModel() shows no error - 
where is my mistake?



OpenModelica distribution as of now doesn't contain the Thermal
library, but if I use the latest Modelica Standard Library 3.0
then I can simulate your model. Check the attached .mo and .mos.
I had to change from:
Modelica.Thermal.HeatTransfer.HeatCapacitor
to:
Modelica.Thermal.HeatTransfer.Components.HeatCapacitor

To use a different library you will need to edit your environment
variable called OPENMODELICALIBARY to point to the new library.

Cheers,
Adrian Pop/



thanks,
christian


###

model SimpleRoomR1 "Modelling of one wall only"

  ThermalResistor R_Rest_AW(R=0.0170356);
  ThermalResistor R_1_AW(R=0.0170356);
  Modelica.Thermal.HeatTransfer.HeatCapacitor C_1_AW(C=1.49028e6);
  Modelica.Thermal.HeatTransfer.Celsius.PrescribedTemperature T_A;
  Modelica.Thermal.HeatTransfer.Celsius.PrescribedTemperature T_I;

equation

  T_A.T=25;
  T_I.T=21;
  connect(T_A.port, R_Rest_AW.port_a);
  connect(T_I.port, R_1_AW.port_b);
  connect(R_Rest_AW.port_b, C_1_AW.port);
  connect(C_1_AW.port, R_1_AW.port_a);

end SimpleRoomR1;

###

model ThermalResistor

  extends Modelica.Thermal.HeatTransfer.Interfaces.Element1D;
  parameter Modelica.SIunits.ThermalResistance R;

equation

  Q_flow=1/R*dT;

end ThermalResistor;

############################################################





                

model ThermalResistor
  extends Modelica.Thermal.HeatTransfer.Interfaces.Element1D;
  parameter Modelica.SIunits.ThermalResistance R;
equation
  Q_flow=1/R*dT;
end ThermalResistor; 

model SimpleRoomR1 "Modelling of one wall only"

  ThermalResistor R_Rest_AW(R=0.0170356);
  ThermalResistor R_1_AW(R=0.0170356);
  Modelica.Thermal.HeatTransfer.Components.HeatCapacitor C_1_AW(C=1.49028e6);
  Modelica.Thermal.HeatTransfer.Celsius.PrescribedTemperature T_A;
  Modelica.Thermal.HeatTransfer.Celsius.PrescribedTemperature T_I;

equation

  T_A.T=25;
  T_I.T=21;
  connect(T_A.port, R_Rest_AW.port_a);
  connect(T_I.port, R_1_AW.port_b);
  connect(R_Rest_AW.port_b, C_1_AW.port);
  connect(C_1_AW.port, R_1_AW.port_a);

end SimpleRoomR1;


loadModel(Modelica);
loadFile("SimpleRoomR1.mo");
instantiateModel(ThermalResistor);
instantiateModel(SimpleRoomR1);
simulate(SimpleRoomR1, stopTime=8);
plot(R_1_AW.Q_flow);

<<inline: plot.png>>

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true
true
"fclass ThermalResistor
Real Q_flow(quantity = "Power", unit = "W") "Heat flow rate from port_a -> 
port_b";
Real dT(quantity = "ThermodynamicTemperature", unit = "K") "port_a.T - 
port_b.T";
Real port_a.T(quantity = "ThermodynamicTemperature", unit = "K", displayUnit = 
"degC", min = 0.0) "Port temperature";
Real port_a.Q_flow(quantity = "Power", unit = "W") "Heat flow rate (positive if 
flowing from outside into the component)";
Real port_b.T(quantity = "ThermodynamicTemperature", unit = "K", displayUnit = 
"degC", min = 0.0) "Port temperature";
Real port_b.Q_flow(quantity = "Power", unit = "W") "Heat flow rate (positive if 
flowing from outside into the component)";
parameter Real R(quantity = "ThermalResistance", unit = "K/W");
equation
  Q_flow = dT / R;
  dT = port_a.T - port_b.T;
  port_a.Q_flow = Q_flow;
  port_b.Q_flow = -Q_flow;
  port_b.Q_flow = 0.0;
  port_a.Q_flow = 0.0;
end ThermalResistor;
"
"fclass SimpleRoomR1
Real R_Rest_AW.Q_flow(quantity = "Power", unit = "W") "Heat flow rate from 
port_a -> port_b";
Real R_Rest_AW.dT(quantity = "ThermodynamicTemperature", unit = "K") "port_a.T 
- port_b.T";
Real R_Rest_AW.port_a.T(quantity = "ThermodynamicTemperature", unit = "K", 
displayUnit = "degC", min = 0.0) "Port temperature";
Real R_Rest_AW.port_a.Q_flow(quantity = "Power", unit = "W") "Heat flow rate 
(positive if flowing from outside into the component)";
Real R_Rest_AW.port_b.T(quantity = "ThermodynamicTemperature", unit = "K", 
displayUnit = "degC", min = 0.0) "Port temperature";
Real R_Rest_AW.port_b.Q_flow(quantity = "Power", unit = "W") "Heat flow rate 
(positive if flowing from outside into the component)";
parameter Real R_Rest_AW.R(quantity = "ThermalResistance", unit = "K/W") = 
0.0170356;
Real R_1_AW.Q_flow(quantity = "Power", unit = "W") "Heat flow rate from port_a 
-> port_b";
Real R_1_AW.dT(quantity = "ThermodynamicTemperature", unit = "K") "port_a.T - 
port_b.T";
Real R_1_AW.port_a.T(quantity = "ThermodynamicTemperature", unit = "K", 
displayUnit = "degC", min = 0.0) "Port temperature";
Real R_1_AW.port_a.Q_flow(quantity = "Power", unit = "W") "Heat flow rate 
(positive if flowing from outside into the component)";
Real R_1_AW.port_b.T(quantity = "ThermodynamicTemperature", unit = "K", 
displayUnit = "degC", min = 0.0) "Port temperature";
Real R_1_AW.port_b.Q_flow(quantity = "Power", unit = "W") "Heat flow rate 
(positive if flowing from outside into the component)";
parameter Real R_1_AW.R(quantity = "ThermalResistance", unit = "K/W") = 
0.0170356;
parameter Real C_1_AW.C(quantity = "HeatCapacity", unit = "J/K") = 1490280.0 
"Heat capacity of element (= cp*m)";
Real C_1_AW.T(quantity = "ThermodynamicTemperature", unit = "K", displayUnit = 
"degC", min = 0.0, start = 293.15) "Temperature of element";
Real C_1_AW.der_T(quantity = "TemperatureSlope", unit = "K/s", start = 0.0) 
"Time derivative of temperature (= der(T))";
Real C_1_AW.port.T(quantity = "ThermodynamicTemperature", unit = "K", 
displayUnit = "degC", min = 0.0) "Port temperature";
Real C_1_AW.port.Q_flow(quantity = "Power", unit = "W") "Heat flow rate 
(positive if flowing from outside into the component)";
Real T_A.port.T(quantity = "ThermodynamicTemperature", unit = "K", displayUnit 
= "degC", min = 0.0) "Port temperature";
Real T_A.port.Q_flow(quantity = "Power", unit = "W") "Heat flow rate (positive 
if flowing from outside into the component)";
Real T_A.T;
Real T_I.port.T(quantity = "ThermodynamicTemperature", unit = "K", displayUnit 
= "degC", min = 0.0) "Port temperature";
Real T_I.port.Q_flow(quantity = "Power", unit = "W") "Heat flow rate (positive 
if flowing from outside into the component)";
Real T_I.T;
equation
  R_Rest_AW.Q_flow = R_Rest_AW.dT / R_Rest_AW.R;
  R_Rest_AW.dT = R_Rest_AW.port_a.T - R_Rest_AW.port_b.T;
  R_Rest_AW.port_a.Q_flow = R_Rest_AW.Q_flow;
  R_Rest_AW.port_b.Q_flow = -R_Rest_AW.Q_flow;
  R_1_AW.Q_flow = R_1_AW.dT / R_1_AW.R;
  R_1_AW.dT = R_1_AW.port_a.T - R_1_AW.port_b.T;
  R_1_AW.port_a.Q_flow = R_1_AW.Q_flow;
  R_1_AW.port_b.Q_flow = -R_1_AW.Q_flow;
  C_1_AW.T = C_1_AW.port.T;
  C_1_AW.der_T = der(C_1_AW.T);
  C_1_AW.C * der(C_1_AW.T) = C_1_AW.port.Q_flow;
  T_A.port.T = Modelica.SIunits.Conversions.from_degC(T_A.T);
  T_I.port.T = Modelica.SIunits.Conversions.from_degC(T_I.T);
  T_A.T = 25.0;
  T_I.T = 21.0;
  R_Rest_AW.port_b.Q_flow + C_1_AW.port.Q_flow + R_1_AW.port_a.Q_flow = 0.0;
  R_Rest_AW.port_b.T = C_1_AW.port.T;
  C_1_AW.port.T = R_1_AW.port_a.T;
  T_I.port.Q_flow + R_1_AW.port_b.Q_flow = 0.0;
  T_I.port.T = R_1_AW.port_b.T;
  T_A.port.Q_flow + R_Rest_AW.port_a.Q_flow = 0.0;
  T_A.port.T = R_Rest_AW.port_a.T;
end SimpleRoomR1;
"
record
    resultFile = "SimpleRoomR1_res.plt"
end record
true

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