Changeset 567 for branches/gui/eml/pressure_changers

Timestamp:

Jul 24, 2008, 10:45:34 AM (15 years ago)

Author:

Rafael de Pelegrini Soares

Message:

valve_flow model simplified and now the Sample_Flowsheet is running fast

File:

• branches/gui/eml/pressure_changers/valve.mso (modified) (2 diffs)

branches/gui/eml/pressure_changers/valve.mso

@@ -218 +218 @@
         Pallete         = true;
         Icon            = "icon/Valve"; 
-        Brief           = "Model of a very simple valve - used in distillation column models.";
+        Brief           = "Model of a very simple valve for setting the flow with a controller.";
         Info            =
 "== Assumptions ==
-* no flashing liquid in the valve;
-* the flow in the valve is adiabatic;
-* dynamics in the valve are neglected;
-* linear flow type.
+* nothing happens in this valve
         
 == Specify ==
 * the inlet stream
-* the plug position (x) OR outlet temperature (Outlet.T) OR outlet pressure (Outlet.P) 
-        
-        OR              
-        
-* the inlet stream excluding its flow (Inlet.F)
-* the outlet pressure (Outlet.P) OR outlet flow (Outlet.F)
-* the plug position (x)
+* the flow fraction
 ";
 
@@ -246 +237 @@
         VARIABLES
 in      Inlet   as stream       (Brief = "Inlet stream", PosX=0, PosY=0.7365, Symbol="_{in}");
-out     Outlet  as streamPH     (Brief = "Outlet stream", PosX=1, PosY=0.7365, Symbol="_{out}");
+out     Outlet  as stream       (Brief = "Outlet stream", PosX=1, PosY=0.7365, Symbol="_{out}");
 in      FlowFraction as fraction (Brief="Flow Signal", PosX=0.5, PosY=0);
         
         EQUATIONS
         "Overall Molar Balance"
-        Inlet.F = Outlet.F;
-        
+        Outlet.F = Inlet.F;
+        "Temperature"
+        Outlet.T = Inlet.T;
+        "Pressure"
+        Outlet.P = Inlet.P;
+        "Energy Balance"
+        Outlet.h = Inlet.h;
+        "Vapour fraction"
+        Outlet.v = Inlet.v;
+
         "Componente Molar Balance"
-        Inlet.z = Outlet.z;
-        
-        "Energy Balance"
-        Inlet.h = Outlet.h;
-
-        "Pressure"
-        Outlet.P  = Inlet.P;
-
-        "Flow"
+        Outlet.z = Inlet.z;
+
+        "Flow computation"
         Outlet.F = MinFlow + FlowFraction*(MaxFlow-MinFlow);
 end