常减压模拟不收敛，求解决！

onom54783 · 发表于 1970-1-1 08:00:00

INNER  1 : E(ENTH+SPEC) = 4.101E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 4.101E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 4.101E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 4.101E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 4.072E-01  ALPHA = -0.0035
         INNER  2 : E(ENTH+SPEC) = 4.070E-01  ALPHA = -0.0003
         INNER  3 : E(ENTH+SPEC) = 4.062E-01  ALPHA =  0.0003
         INNER  4 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0060
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 4.058E-01  ALPHA =  0.0000
*** ERROR ***  COLUMN calculations TERMINATED. Alpha ( the damping factor )
            was BELOW .01 for 4 consecutive iterations after 15 new matrix
            calculations.
*** A FATAL ERROR OCCURRED ON ITERATION 2
*** ERROR HISTORY IS NOT AVAILABLE FOR THIS ITERATION
*** ERROR ***  UNIT 11 - WATER SUPERSATURATION DETECTED on 1 trays. Column
            solution is likely to be erroneous. Rerun using the SURE column
            with the FREEWATER (DECANT) option enabled.
UNIT 11 NOT SOLVED
*** PROBLEM SOLUTION NOT REACHED
** WARNING **  Unit '11' DID NOT SOLVE
*** Run completed - Case not solved

*** THIS RUN USED 178.77 PRO/II SIMULATION UNITS

*** RUN STATISTICS
STARTED 17:35:50 10/23/13          2 ERRORS
FINISHED 17:35:51 10/23/13          3 WARNINGS
RUN TIMES                            2 MESSAGES
   INTERACTIVE    0 MIN,  0.00 SEC
   CALCULATIONS 0 MIN,  0.78 SEC
   TOTAL          0 MIN,  0.78 SEC
   R
PRO/II  Version 9.0 ELEC V7.0 - Calculation module
==================================================

*** READING PRO/II DATABASE
PROJECT                USER
PROBLEM                DATE  10/23/13

*** PROBLEM SOLUTION BEGINS
FEED FLASH BEGINS
FEED FLASH COMPLETE
UNIT 1    BEGINS - 'T2201    '
** MESSAGE **  Column UNIT 1, 'T2201' skipped because all feeds are identical,
            tray locations of feeds, draws and heaters are unchanged and
            all specifications are the same as the previous solution.
UNIT 1    SOLVED
UNIT 2    BEGINS - 'P2203    '
UNIT 2    SOLVED
UNIT 3    BEGINS - 'F2201    '
UNIT 3    SOLVED
UNIT 11    BEGINS
** WARNING **  VARIED FEED S1-IN-T2202 IS A PRODUCT FROM ANOTHER UNIT. MASS
            BALANCE MAY NOT BE MET.
** WARNING **  VARIED FEED S2-IN-T2202 IS A PRODUCT FROM ANOTHER UNIT. MASS
            BALANCE MAY NOT BE MET.
** MESSAGE **  All product rate estimates have been scaled by a factor of
            .94992 to match the total feed to the tower.
         INNER  0 : E(ENTH+SPEC) = 5.386E-01
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.386E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.386E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.386E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.386E-01  ALPHA =  0.0000
   ITER  1 E(K) = 1.564E-01 E(ENTH+SPEC) = 5.386E-01  E(SUM) = 6.421E+00
            DAMP = 7.000E-01
         INNER  0 : E(ENTH+SPEC) = 5.317E-01
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         CALCULATING NEW MATRIX
         INNER  1 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  2 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  3 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
         INNER  4 : E(ENTH+SPEC) = 5.317E-01  ALPHA =  0.0000
*** ERROR ***  COLUMN calculations TERMINATED. Alpha ( the damping factor )
            was BELOW .01 for 4 consecutive iterations after 15 new matrix
            calculations.
*** A FATAL ERROR OCCURRED ON ITERATION 2
*** ERROR HISTORY IS NOT AVAILABLE FOR THIS ITERATION
UNIT 11 NOT SOLVED
*** PROBLEM SOLUTION NOT REACHED
** WARNING **  Unit '11' DID NOT SOLVE
*** Run completed - Case not solved

*** THIS RUN USED 178.77 PRO/II SIMULATION UNITS

*** RUN STATISTICS
STARTED 17:35:52 10/23/13          1 ERROR
FINISHED 17:35:52 10/23/13          3 WARNINGS
RUN TIMES                            2 MESSAGES
   INTERACTIVE    0 MIN,  0.00 SEC
   CALCULATIONS 0 MIN,  0.67 SEC
   TOTAL          0 MIN,  0.67 SEC
附件中时模拟和转化的数据文件（PROII9.0），常压主产汽柴油，减压产柴油和蜡油；请高手帮忙看下是什么原因不收敛？

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jacques0920 · 发表于 1970-1-1 08:00:00

我也来学一下

zklion · 发表于 1970-1-1 08:00:00

没人知道吗？ALPHA是啥意思

蓝山居士 · 发表于 1970-1-1 08:00:00

本帖最后由蓝山居士于 2014-1-20 11:12 编辑

α 是一个乘数，其绝对值越小，说明内圈收敛很差，绝对值接近或等于1说明内圈收敛很好。
收敛历史中，α 很小，计算机重置多次仍无法改变，建议检查规定。
看了你的模拟文件，里面错误很多，若你是做的例子，请上传源文件，如果是模拟实际装置，请上传工艺参数，要求。。

[求助] 常减压模拟不收敛，求解决！

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