Changeset 372 for trunk/eml/pressure_changers/compressor.mso

Timestamp:

Sep 21, 2007, 7:17:36 PM (16 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/pressure_changers/compressor.mso (modified) (3 diffs)

trunk/eml/pressure_changers/compressor.mso

@@ -48 +48 @@
         Cp              as cp_mol               (Brief = "Heat Capacity");
         Cv                      as cv_mol               (Brief = "Heat Capacity");
-        Pdiff           as press_delta  (Brief = "Pressure Increase", DisplayUnit='kPa');
-        Pratio          as positive             (Brief = "Pressure Ratio");     
+        Pratio          as positive             (Brief = "Pressure Ratio", Symbol ="P_{ratio}");        
+        Pdrop           as press_delta  (Brief = "Pressure Drop", DisplayUnit = 'kPa', Symbol ="\Delta P");
         Wp                      as energy_mol   (Brief = "Politropic Head");
         Ws                      as energy_mol   (Brief = "Isentropic Head");
@@ -68 +68 @@
         Mwm = sum(Mw*Inlet.z);
 
-        "Calculate Outlet Stream Pressure"
-        Outlet.P = Inlet.P + Pdiff;
-        
-        "Pratio Definition"
+        "Pressure Ratio"
         Outlet.P = Inlet.P * Pratio;
-        
+
+        "Pressure Drop"
+        Outlet.P  = Inlet.P - Pdrop;
+
         "Calculate Cp Using a External Physical Properties Routine"
         Cp = PP.VapourCp(Inlet.T,Inlet.P,Inlet.z);
@@ -106 +106 @@
         FPower*Effs = Inlet.F*Ws;
         
-        "Molar Balance"
+        "Overall Molar Balance"
         Outlet.F = Inlet.F;
-        
+
+        "Component Molar Balance"
         Outlet.z = Inlet.z;
 end