mea吸收co2的Aspen模拟

liubiyu · 发表于 2010-8-3 11:03:26

MEA吸收co2的Aspen模拟。
模拟过程出现问题太多，初学者无法解决，请求高手指导，附上原件
Block: B9    Model: RATEFRAC
  * WARNING
   TOTAL FLOW IS ZERO
  * WARNING
   AT LEAST ONE FEED IS ZERO.

      *** Iteration history during initialization ***
   Iteration number    Dogleg step    Value of two-norm
            0                               5.87725D-01
            1                               1.34802D+00
                              1             4.65802D-01
            2                               2.86145D-01
            3                               3.30959D+00
                              1             3.43711D+00
                              2             2.87641D+00
                              3             2.86892D+00
                              4             2.55318D+00
                              5             2.55079D+00
            4                               1.74851D+00
            5                               1.86888D+00
            6                               2.00543D+00
            7                               1.99977D+00
            8                               1.99235D+00
            9                               1.98411D+00
            10                               2.23419D+00
            11                               2.95872D+00
                              1             2.22921D+00
            12                               2.95087D+00
                              1             2.22359D+00
            13                               2.94282D+00
                              1             2.21686D+00
            14                               2.96787D+00
                              1             2.20416D+00
            15                               3.37068D+00
                              1             2.17999D+00
            16                               7.12607D+00
                              1             2.15882D+00
            17                               2.66843D+00
                              1             2.15562D+00
            18                               6.48936D+03
                              1             7.79394D+01
                              2             3.88671D+01
                              3             1.93963D+01
                              4             9.75579D+00
                              5             5.10983D+00
                              6             3.07092D+00
            19                               4.10436D+12
                              1             7.59877D+00
                              2             6.02482D+00
                              3             4.88456D+00
                              4             4.14434D+00
            20                               5.19843D+09
                              1             4.85653D+00
            21                               5.01997D+11
                              1             5.22421D+00
            22                               2.58974D+00
                              1             5.19792D+00
            23                               1.17882D+10
                              1             5.46127D+00
            24                               2.70352D+10
                              1             5.60028D+00
            25                               4.17663D+10
                              1             5.66974D+00
            26                               5.26927D+10
                              1             5.67653D+00
            27                               5.92463D+10
                              1             5.60537D+00
            28                               6.51078D+10
                              1             5.46008D+00
            29                               4.93570D+11
                              1             5.47146D+00
            30                               1.41231D+03
   Iterations have reached a maximum value of  30 iterations
  **  ERROR
   THE FOLLOWING SEGMENTS DRIED UP (VAPOR OR LIQUID FLOW APPROACHES 0):
      1 3 4 5 6 7 8
  **  ERROR
   RATEFRAC CALCULATIONS DID NOT COMPLETE NORMALLY - BLOCK BYPASSED.

  **  ERROR
   BLOCK B9 IS NOT IN MASS BALANCE:
   MASS INLET FLOW = 0.26758267E+02, MASS OUTLET FLOW = 0.28560617E+02
   RELATIVE DIFFERENCE = 0.67356758E-01

Block: B10    Model: HEATER
  *** SEVERE ERROR IN PHYSICAL PROPERTY SYSTEM
   HENRY CONSTANT MODEL HENRY1 HAS MISSING PARAMETERS:
   HENRY/1ST ELEMENT (DATA SET 1) MISSING FOR SUPERCRITICAL COMPONENT
   N2 WITH ALL SOLVENTS:
   MEA
   HENRY/1ST ELEMENT (DATA SET 1) MISSING FOR SUPERCRITICAL COMPONENT
   O2 WITH ALL SOLVENTS:
   MEA
  ****PROPERTY PARAMETER ERROR
   ERRORS ENCOUNTERED IN CALCULATION OF LIQUID MIXTURE PROPS USING
   OPTION SET ELECNRTL FOR PHIMX"

! Calculations stopped because of missing  property parameters

下载地址

emea1.bkp

2010-8-3 10:52 大小：264.7 KB 下载次数：89

张斌 · 发表于 2010-8-15 22:18:11

有一些必要参数没有输入吧

yuzhs · 发表于 2010-9-5 21:54:15

missing property parameters
迭代次数

gyc001 · 发表于 2010-9-6 14:36:09

注意塔设置时要设置成吸收塔计算，另外看你的警告和错误中有那么多零进料的大概是你的流程有循环回路吧，有的话先把循环断开，等收敛后在把循环连上，做相应的设置。

yuning301 · 发表于 2011-1-10 10:52:46

请教楼上的收敛具体是什么意思

bernabeu · 发表于 2011-3-25 19:34:26

迭代次数设置大点如200 吸收时一般都设成200的

Iris的轻言细语 · 发表于 2011-8-11 15:57:45

我也想做这个，不过是不是很复杂啊？

紫心 · 发表于 2011-8-15 11:37:53

有时候这种情况也与初值的设定有关，改动一下流股初值试试吧

Uwqqmm · 发表于 1970-1-1 08:00:00

跟着学习了，谢谢楼主，谢谢各位的答复。

mea吸收co2的Aspen模拟

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