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zoushaobing

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注册: 2013-02-27
专业: 无机超分子化学

[求助] aspen plus模拟结果求助已有1人参与

用Aspen 7.2模拟精馏，先用dstwu结果没出错，但精算用radfrac（第二段模拟）模拟时一直出现警告，求各位大神帮忙改下
Loading Simulation Engine 21:30:58 Fri Jun 6, 2014>>

  * WARNING IN PHYSICAL PROPERTY SYSTEM
   UNSYMMETRIC ELECTROLYTE NRTL MODEL GMENRTLQ HAS MISSING PARAMETERS:
   Dielectric constant (CPDIEC) MISSING FOR C2H4    & OTHER COMPONENTS.
   CPDIEC OF WATER CALCULATED FROM HELGESON AND KIRKHAM CORRELATION
   (1974) WILL BE ASSUMED.

<< Problem specifications modified 21:32:21 Fri Jun 6, 2014>>

->Processing input specifications ...

->Finished processing new specifications

->Calculations begin ...

Block: GDEBUT Model: RADFRAC
  * WARNING
   FEED PRESSURE  0.10000E+06 (N/SQM) OF STREAM 9
   IS LOWER THAN STAGE 8 PRESSURE  0.20920E+07 (N/SQM).

   Convergence iterations:
      OL IL    Err/Tol
  *** SEVERE ERROR
   SINGULAR MATRIX WAS ENCOUNTERED IN INSIDE LOOP CALCULATIONS.
   PLEASE REVIEW COLUMN AND/OR DESIGN SPECIFICATIONS.

  * WARNING
   REST OF BLOCK BYPASSED DUE TO SEVERE ERROR.

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC
  * WARNING
   FEED PRESSURE  0.10000E+06 (N/SQM) OF STREAM 3
   IS LOWER THAN STAGE  10 PRESSURE  0.97800E+06 (N/SQM).

   Convergence iterations:
      OL IL    Err/Tol
      1 10    2188.7
      2 10    857.59
      3 10    370.65
      4 10    124.16[email][/email]
      5 10    44.665
      6 10    19.054
      7 10    7.3684
      8 10    3.8124
  **  ERROR
   VAPOR OR LIQUID FLOW ON STAGE 11 IS TENDING TO DISAPPEAR.
   PLEASE REVIEW REFLUX/BOILUP AND DESIGN SPECIFICATIONS.

> Beginning Convergence Loop $OLVER05 Method: WEGSTEIN

Block: B4    Model: MIXER

Block: GDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 10    210.69
      2 10    236.07
      3 9    79.211
      4 6    8.8619
      5 6    2.7689
      6 6    0.97569

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
  *** SEVERE ERROR
   SINGULAR MATRIX WAS ENCOUNTERED IN INSIDE LOOP CALCULATIONS.
   PLEASE REVIEW COLUMN AND/OR DESIGN SPECIFICATIONS.

  * WARNING
   REST OF BLOCK BYPASSED DUE TO SEVERE ERROR.

> Loop $OLVER05 Method: WEGSTEIN    Iteration 1
7 vars not converged, Max Err/Tol  -0.10000E+05

Block: B4    Model: MIXER

Block: GDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 4    20.336
      2 3    5.2850
      3 3    0.95115

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 9    168.27
      2 8    48.795
      3 6    17.346
      4 6    5.8899
      5 7    0.43462

> Loop $OLVER05 Method: WEGSTEIN    Iteration 2
9 vars not converged, Max Err/Tol 0.21500E+16

Block: B4    Model: MIXER

Block: GDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 10    198.90
      2 6    58.590
      3 4    17.972
      4 3    2.3449
      5 3    0.75188

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 6    15.636
      2 3    4.5903
      3 3    0.93728

> Loop $OLVER05 Method: WEGSTEIN    Iteration 3
8 vars not converged, Max Err/Tol 0.11135E+05

Block: B4    Model: MIXER

Block: GDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 6    27.742
      2 3    6.5231
      3 2    0.83356

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 2    0.33073

> Loop $OLVER05 Method: WEGSTEIN    Iteration 4
8 vars not converged, Max Err/Tol  -0.50146E+04

Block: B4    Model: MIXER

Block: GDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 4    7.0457
      2 3    1.7904
      3 2    0.27676

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 2    0.99185E-01

> Loop $OLVER05 Method: WEGSTEIN    Iteration 5
8 vars not converged, Max Err/Tol 0.66576E+03

Block: B4    Model: MIXER

Block: GDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 1    0.52779E-01

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 1    0.71433E-02

> Loop $OLVER05 Method: WEGSTEIN    Iteration 6
5 vars not converged, Max Err/Tol  -0.12413E+02

Block: B4    Model: MIXER

Block: GDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 1    0.86650E-02

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 1    0.56037E-03

> Loop $OLVER05 Method: WEGSTEIN    Iteration 7
1 vars not converged, Max Err/Tol 0.46575E+01

Block: B4    Model: MIXER

Block: GDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 1    0.12805E-02

Block: B8    Model: HEATER

Block: LDEBUT Model: RADFRAC

   Convergence iterations:
      OL IL    Err/Tol
      1 1    0.10462E-03

> Loop $OLVER05 Method: WEGSTEIN    Iteration 8
# Converged             Max Err/Tol  -0.83963E+00

->Simulation calculations completed ...

  ***  Warning(s) were issued during Input Translation ***
  ***  Check the Run Status Results for more Information ***

            ***  Summary of Simulation Errors  ***

               Physical
               Property       System       Simulation
  Terminal Errors    0             0             0
Severe Errors    0             0             2
         Errors    0             0             1
      Warnings    1             0             4

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