Changeset 100 for mso/eml/heat_exchangers/HEX_Engine.mso

Timestamp:

Jan 9, 2007, 12:15:56 PM (15 years ago)

Author:

gerson bicca

Message:

updated

File:

• mso/eml/heat_exchangers/HEX_Engine.mso (modified) (8 diffs)

mso/eml/heat_exchangers/HEX_Engine.mso

@@ -146 +146 @@
 #=====================================================================  
 VARIABLES
-
 PdTube                  as press_delta  (Brief="Tube Pressure Drop",Default=0.01, Lower=1e-10);
 Pdtotal                 as press_delta  (Brief="Total Pressure Drop",Default=0.01, Lower=1e-10);
@@ -186 +185 @@
 Vnozzle_in      as velocity             (Brief="Inlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
 Vnozzle_out     as velocity             (Brief="Outlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
-RVsquare_in     as flux_mass    (Brief="Inlet Nozzle rho-V^2");
-RVsquare_out    as flux_mass    (Brief="Outlet Nozzle rho-V^2");
+RVsquare_out    as positive (Brief = "Outlet Nozzle rho-V^2", Default=1, Upper=1e6, Unit = "kg/s^2/m");
+RVsquare_in     as positive (Brief = "Inlet Nozzle rho-V^2", Default=1, Upper=1e6, Unit = "kg/s^2/m");
 
 EQUATIONS
-
 "Shell Side Total Pressure Drop"
         Pdtotal = PdCross + PdEndZones + Pdnozzle_in + Pdnozzle_out + Pdwindow;
@@ -233 +231 @@
 #=====================================================================  
 VARIABLES
-
 Rtube   as positive     (Brief="Tube Resistance",Unit="m^2*K/kW",Lower=1e-6);
 Rwall   as positive     (Brief="Wall Resistance",Unit="m^2*K/kW",Lower=1e-6);
 Rshell  as positive     (Brief="Shell Resistance",Unit="m^2*K/kW",Lower=1e-6);
-
+Rfi             as positive     (Brief="Inside Fouling Resistance",Unit="m^2*K/kW",Default=1e-6,Lower=0);
+Rfo             as positive     (Brief="Outside Fouling Resistance",Unit="m^2*K/kW",Default=1e-6,Lower=0);
 end
 
@@ -247 +245 @@
 A               as area                         (Brief="Exchange Surface Area");
 Q               as power                        (Brief="Heat Transfer", Default=7000, Lower=1e-6, Upper=1e10);
-U               as heat_trans_coeff (Brief="Overall Heat Transfer Coefficient",Default=1,Lower=1e-6,Upper=1e10);
+Uc              as heat_trans_coeff (Brief="Overall Heat Transfer Coefficient Clean",Default=1,Lower=1e-6,Upper=1e10);
+Ud              as heat_trans_coeff (Brief="Overall Heat Transfer Coefficient Dirty",Default=1,Lower=1e-6,Upper=1e10);
 Ch      as positive                     (Brief="Hot Stream Heat Capacity",Lower=1e-3,Default=1e3,Unit="W/K");
 Cc      as positive                     (Brief="Cold Stream Heat Capacity",Lower=1e-3,Default=1e3,Unit="W/K");
@@ -257 +256 @@
 EQUATIONS
 "Number of Units Transference"
-        NTU*Cmin = U*A;
+        NTU*Cmin = Ud*A;
 end
 
@@ -298 +297 @@
 Model DoublePipe_HeatTransfer
 #=====================================================================
-#       Heat Transfer
+#       Double Pipe Heat Transfer Block
 #=====================================================================  
 PARAMETERS
@@ -314 +313 @@
 Model DoublePipe_PressureDrop
 #=====================================================================
-#       Pressure Drop
+#       #       Double Pipe Pressure Drop Block
 #=====================================================================  
 PARAMETERS
@@ -326 +325 @@
 
 Model Main_DoublePipe
+#=====================================================================
+#       Double Pipe Main Variables
+#=====================================================================  
 VARIABLES
 HeatTransfer as DoublePipe_HeatTransfer;