Changeset 141 for branches/newlanguage/sample/miscellaneous

Timestamp:

Jan 30, 2007, 1:55:55 PM (16 years ago)

Author:

Rafael de Pelegrini Soares

Message:

Updated the switch sample, now working fine

File:

• branches/newlanguage/sample/miscellaneous/sample_switcher.mso (modified) (3 diffs)

branches/newlanguage/sample/miscellaneous/sample_switcher.mso

@@ -13 +13 @@
         T as temperature;
         Pout as pressure;
-        k as Real;
+        k as Real(Default=1e-3);
 
         VARIABLES
         flow_in as flow_mol;
         flow_out as flow_mol;
-        P as pressure;
+        P as pressure(Default=3);
         n as mol;
         
@@ -40 +40 @@
 end
 
+
+Model BallWithSafetyValve2
+        ATTRIBUTES
+        Info = "A fixed volume ball with a safety valve
+        for the pressure.";
+        
+    PARAMETERS
+    ValveMode as Switcher(Valid = ["closed", "opened"], Default = "closed");
+        R as Real(Unit="J/(K*mol)", Default=8.314472);
+        V as volume;
+        T as temperature;
+        Pout as pressure;
+        k as Real(Default=1e-4);
+
+        VARIABLES
+        flow_in as flow_mol;
+        flow_out as flow_mol;
+        P as pressure(Default=3);
+        n as mol;
+        
+    EQUATIONS
+
+        "Ideal gas relation"
+        P*V = n*R*T;
+        
+        "Mass balance"
+        diff(n) = flow_in - flow_out;
+        
+    #switch ValveMode
+        #case "closed":
+        #       flow_out = 0 * "mol/h";
+        #       when P > 2*"atm" switchto "opened";
+
+        #case "opened":
+                flow_out = k*sqrt(P - Pout);
+        #       when P < Pout * 1.1 switchto "closed";
+        #end
+end
+
 FlowSheet Test
         DEVICES
@@ -48 +87 @@
         ball.T = 300 * "K";
         ball.Pout = 1 * "atm";
-        ball.ValveMode = "closed";
+        ball.ValveMode = "opened";
         
         SPECIFY
-        ball.flow_in = 2 * "mol/h";
+        ball.flow_in = 0.1 * "kmol/h";
         
         INITIAL
-        ball.P = 0.8 * "atm";
+        ball.P = 1 * "atm";
+        
+        OPTIONS
+        TimeStep = 0.01;
+        TimeEnd = 10;
 end