There is a simulation in which energy is not conserved; what should be done?
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$ Generated by PRO/II Keyword Generation System $ Generated on: Sat Feb 13 20:35:13 2016 TITLE TOLERANCE FLASH=3E-6 DIMENSION METRIC, PRES=KPA, PBASIS=101.325 SEQUENCE SIMSCI CALCULATION RECYCLE=TEAR COMPONENT DATA LIBID 1,H20/2,IPROPNOL/3,BENZENE, BANK=SIMSCI,PROCESS ASSAY FIT=ALTERNATE, CONVERSION=API94, CURVEFIT=CURRENT, & KVRECONCILE=TAILS, FORMATION=VER91 THERMODYNAMIC DATA METHOD SYSTEM=UNIQ, SET=UNIQ01, DEFAULT METHOD SYSTEM(VLLE)=UNIQ, SET=UNIQ02 STREAM DATA PROPERTY STREAM=FEED, PRESSURE=111, PHASE=L, & COMPOSITION(M,KGM/H)=1,30.22/2,63.94 PROPERTY STREAM=MAKEUP, PRESSURE=111, PHASE=L, RATE(M)=0.25, & COMPOSITION(M)=3,1 PROPERTY STREAM=RECYCLE, PRESSURE=111, PHASE=L, RATE(M)=246, & COMPOSITION(M)=1,0.1/2,0.25/3,0.65 OUTPUT FORMAT=MATERIAL, SPTPRINT=ON OUTPUT FORMAT=MATERIAL, STREAMS=IPROPNOL, SPTPRINT=ON UNIT OPERATIONS COLUMN UID=T1 PARAMETER TRAY=38,CHEMDIST=50 CVARIABLE=LOG FEED FEED,5/RECYCLE,1 PRODUCT OVHD(M)=S4, BTMS(M)=IPROPNOL,55.5, SUPERSEDE=ON DUTY 1,38,,REBOILER PSPEC PTOP=101, DPCOLUMN=3 PRINT PROPTABLE=PART ESTIMATE MODEL=CHEM SPEC ID=COL1SPEC1, STREAM=IPROPNOL,FRACTION(WT), COMP=2,WET, & VALUE=0.995 VARY DNAME=REBOILER VLLECHECK CHECK=OFF REBOILER TYPE=KETTLE FLASH UID=F1 FEED S4,S7 PRODUCT L=S5, W=S6 ISO TEMPERATURE=30 METHOD SET=UNIQ02 COLUMN UID=T2 PARAMETER TRAY=10,CHEMDIST=50 CVARIABLE=LOG FEED S6,1 PRODUCT OVHD(M)=S7, BTMS(M)=S9,30, SUPERSEDE=ON DUTY 1,10,,REBOILER PSPEC PTOP=101 PRINT PROPTABLE=PART ESTIMATE MODEL=CHEM SPEC ID=COL2SPEC1, STREAM=S7, RATE(KGM/H),TOTAL,WET, DIVIDE, & STREAM=S6, RATE(KGM/H),TOTAL,WET, VALUE=0.8 VARY DNAME=REBOILER VLLECHECK CHECK=OFF REBOILER TYPE=KETTLE CALCULATOR UID=CA1 SEQUENCE STREAM=MAKEUP DEFINE P(1) AS STREAM=IPROPNOL, RATE(KGM/H), COMP=3,WET DEFINE P(2) AS STREAM=S9, RATE(KGM/H), COMP=3,WET DEFINE P(3) AS STREAM=S7, RATE(KGM/H), COMP=3,WET PROCEDURE R(1) = P(1) + P(2) CALL SRXSTR(SMR,R(1),MAKEUP) RETURN MIXER UID=M1 FEED MAKEUP,S5 PRODUCT M=RECYCLE END
Is it material balance? This changes the loop convergence option from converging individual flow streams to converging all flow streams, not just the fragmented ones. If it’s still considered too large, further reduce the component convergence tolerance.
9.2 converges after running, but 9.3 really cannot converge; even with \"converge all\" and the relative tolerance for the components set to 0.0001, it still does not converge
Oh, then why is that? The version is higher, yet it still can’t converge – is it stricter than before?