Changeset 372 for trunk/eml/heat_exchangers

Timestamp:

Sep 21, 2007, 7:17:36 PM (15 years ago)

Author:

Argimiro Resende Secchi

Message:

Adding pressure drop variable (Pdrop) and pressure ratio (Pratio) in some models. Need to do the same for other models.

File:

• trunk/eml/heat_exchangers/heater.mso (modified) (2 diffs)

trunk/eml/heat_exchangers/heater.mso

@@ -39 +39 @@
         Lfrac                   as fraction             (Brief = "Liquid fraction Outlet Stream",Symbol="L_{frac}");
         Kvalue(NComp)   as Real                         (Brief = "Phase Equilibrium K-values",Symbol="K_{value}");
-in  Inlet(Ninlet )  as stream                   (Brief="Inlet Streams", PosX=0, PosY=0.4833, Symbol="^{in}");
-out Outlet              as streamPH                     (Brief="Outlet Stream", PosX=1, PosY=0.4782, Symbol="^{out}");
+        Pratio                  as positive                     (Brief = "Pressure Ratio", Symbol ="P_{ratio}");        
+        Pdrop                   as press_delta          (Brief = "Pressure Drop", DisplayUnit = 'kPa', Symbol ="\Delta P");
+in  Inlet(Ninlet )  as stream                   (Brief = "Inlet Streams", PosX=0, PosY=0.4833, Symbol="^{in}");
+out Outlet              as streamPH                     (Brief = "Outlet Stream", PosX=1, PosY=0.4782, Symbol="^{out}");
         
  EQUATIONS
@@ -63 +65 @@
         QDuty = Outlet.F*Outlet.h - sum(Inlet.F*Inlet.h);
 
+ "Pressure Drop"
+        Outlet.P = Inlet.P - Pdrop;
+
+ "Pressure Ratio"
+        Outlet.P = Inlet.P * Pratio;
+        
  switch Kvalues # Fix for better convergence !!!
         case "yes":