Changeset 500 for trunk

Timestamp:

Apr 14, 2008, 3:57:48 PM (15 years ago)

Author:

Paula Bettio Staudt

Message:

Packed column model improvements

Location:

trunk

Files:

• eml/stage_separators/column.mso (modified) (4 diffs)
• sample/stage_separators/sample_column.mso (modified) (3 diffs)

trunk/eml/stage_separators/column.mso

@@ -1280 +1280 @@
 * the InletL stream of the top tray;
 * the InletV stream of the bottom tray;
-* the pressure drop (deltaP) of each tray.
+* the total pressure drop (dP) of the section.
         
 == Initial Conditions ==
@@ -1299 +1299 @@
         VARIABLES
         stage(NStages) as packedStage;
+        dP as pressure;
         
         SET
@@ -1305 +1306 @@
         stage.hs = H/NStages;   
         stage.V = stage.hs * stage.d^2*3.14159/4;
+        
+        EQUATIONS
+        stage.deltaP = dP/NStages;
         
         CONNECTIONS
@@ -1320 +1324 @@
 *---------------------------------------------------------------------*# 
 Model PackedDistillation_kettle_cond as Packed_Section_Column
+        ATTRIBUTES
+        Pallete         = true;
+        Icon            = "icon/DistillationKettleCond"; 
+        Brief           = "Model of a distillation column with dynamic condenser and dynamic reboiler.";
+        Info            =
+"== Specify ==
+* the feed stream of each tray (Inlet);
+* the pump pressure difference;
+* the total pressure drop (dP) of the packing;
+* the heat supllied in reboiler and condenser;
+* the condenser vapor outlet flow (OutletV.F);
+* the reboiler liquid outlet flow (OutletL.F);
+* both splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
+        
+== Initial Conditions ==
+* the stages temperature (OutletL.T);
+* the stages initial molar holdup;
+* (NoComps - 1) OutletL (OR OutletV) compositions for each stage;
+        
+* the condenser temperature (OutletL.T);
+* the condenser liquid level (Level);
+* (NoComps - 1) OutletL (OR OutletV) compositions;
+        
+* the reboiler temperature (OutletL.T);
+* the reboiler liquid level (Level);
+* (NoComps - 1) OutletL (OR OutletV) compositions.
+";
+        
         PARAMETERS
         VapourFlow as Switcher(Valid = ["on", "off"], Default = "on");

trunk/sample/stage_separators/sample_column.mso

@@ -555 +555 @@
         reb.z = [0.16, 0.542, 0.013, 0.008, 0.277];
 
-        sec.stage.deltaP = 0.001 * 'atm';
+        sec.dP = 0.008 * 'atm';
 
         SET
@@ -631 +631 @@
         col.pump1.dP = 16 * 'kPa';
 
-        col.stage.deltaP = 0.003 * 'atm';
+        col.dP = 0.024 * 'atm';
 
         SET
@@ -823 +823 @@
         col.pump1.dP = 16 * 'kPa';
         
-        col.stage.deltaP = 0.003 * 'atm';
+        col.dP = 0.024  * 'atm';
 
         SET