Pro2循环不收敛
本帖最后由 soaty@126.com 于 2016-8-11 14:43 编辑附件是不含循环和含循环的文件，我把进口和出口的物质组成基本调成一样了，但是循环还是不收敛，不知道原因。真心求助于大家！
*** READING PRO/II DATABASE
PROJECT USER
PROBLEM DATE
*** PROBLEM SOLUTION BEGINS
FEED FLASH BEGINS
FEED FLASH COMPLETE
Loop1 BEGINS - 'LOOP1 '
UNIT 3 BEGINS - 'R3 '
UNIT 3 SOLVED
UNIT 9 BEGINS - 'CN3 '
CONTROLLER AT ITERATION 1
SPECIFICATION VALUE =0.00000E+00,CALC =0.00000E+00
UNIT 9 SOLVED
UNIT 4 BEGINS - 'E1 '
UNIT 4 SOLVED
UNIT 8 BEGINS - 'P1 '
** WARNING **The feed stream to UNIT 8, 'P1' has a zero rate.
** WARNING **The rates of all product streams from UNIT 8, 'P1' have been
set to zero.
UNIT 8 SKIPPED
UNIT 1 BEGINS - 'R1 '
** WARNING **UNIT 1, 'R1' - Negative component rates encountered.
CALCULATIONS have been HALTED.
UNIT 1 NOT SOLVED
*** PROBLEM SOLUTION NOT REACHED
*** Run completed - Case not solved
*** THIS RUN USED 56.64 PRO/II SIMULATION UNITS
*** RUN STATISTICS
STARTED 10:54:37 08/11/16 NO ERRORS
FINISHED 10:54:37 08/11/16 3 WARNINGS
RUN TIMES NO MESSAGES
INTERACTIVE 0 MIN,0.00 SEC
CALCULATIONS 0 MIN,0.19 SEC
TOTAL 0 MIN,0.19 SEC
关于S2的流量组分没定义，试试引入一股物流与S2混合后进入R1。下图是我的一个萃取精馏循环
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