Changeset 558 for branches/gui/eml/pressure_changers

Timestamp:

Jul 21, 2008, 5:41:41 PM (14 years ago)

Author:

Rafael de Pelegrini Soares

Message:

Added some simple PI controllers and another signal models

File:

• branches/gui/eml/pressure_changers/valve.mso (modified) (1 diff)

branches/gui/eml/pressure_changers/valve.mso

@@ -212 +212 @@
         end
 end
+
+
+Model valve_flow
+        ATTRIBUTES
+        Pallete         = true;
+        Icon            = "icon/Valve"; 
+        Brief           = "Model of a very simple valve - used in distillation column models.";
+        Info            =
+"== Assumptions ==
+* no flashing liquid in the valve;
+* the flow in the valve is adiabatic;
+* dynamics in the valve are neglected;
+* linear flow type.
+        
+== 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)
+";
+
+        PARAMETERS
+outer PP as Plugin(Type="PP");
+outer NComp as Integer;
+
+        MinFlow as flow_mol(Default=0);
+        MaxFlow as flow_mol(Default=1000);
+        
+        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}");
+in      FlowFraction as fraction (Brief="Flow Signal", PosX=0.5, PosY=0);
+        
+        EQUATIONS
+        "Overall Molar Balance"
+        Inlet.F = Outlet.F;
+        
+        "Componente Molar Balance"
+        Inlet.z = Outlet.z;
+        
+        "Energy Balance"
+        Inlet.h = Outlet.h;
+
+        "Pressure"
+        Outlet.P  = Inlet.P;
+
+        "Flow"
+        Outlet.F = MinFlow + FlowFraction*(MaxFlow-MinFlow);
+end
+