2 replies to this topic

[Ingineer]

Dear Community

 

I am getting some type of "incomplete" error using FORTRAN on ASPEN PLUS v8.0 for optimization. 

The following is what appears when I try to move ahead (next).

 

Fortran error at line 1 

 

       RCOST=(0.035*(DIAM1**1.066)*(LEN1**0.082))+(0.035*(DIAM2**1.066)*(LEN2**.082))    

 

  unbalanced parentheses  

 

 

 

Here is the FORTRAN script

 

 

      RCOST=(0.035*(DIAM1**1.066)*(LEN1**0.082))+(0.035*(DIAM2**1.066)*(LEN2**.082))

      CCOST=100*(WCAT1+WCAT2)

      FHCOST=10**(-2.49+0.762*LOG10((QF1+QF2))

      COMPCOST=0.00433*(QCOMP**.82))

      CAPITAL=RCOST+CCOST+FHCOST+COMPCOST

      

      FHENERGY=0.000150*(QF1+QF2)/(31.5576*10**6)

      COMPENERGY=QCOMP*613*(10**-12)

      OPERATING=FHENERGY+COMPENERGY

      

      TAC=(CAPITAL/3)+OPERATING

 

And these are the defined variables

Defined Variable Path

 

FNHEXANE Mole-Flow Stream=FEED Substream=MIXED Component=N-HEXANE Units=kmol/hr

PNHEXANE Mole-Flow Stream=PRODUCT2 Substream=MIXED Component=N-HEXANE Units=kmol/hr

FBENZENE Mole-Flow Stream=FEED Substream=MIXED Component=BENZENE Units=kmol/hr

PBENZENE Mole-Flow Stream=PRODUCT2 Substream=MIXED Component=BENZENE Units=kmol/hr

WCAT1 Block-Var Block=REACTOR1 Variable=CATWT Sentence=PARAM

WCAT2 Block-Var Block=REACTOR2 Variable=CATWT Sentence=PARAM

DIAM1 Block-Var Block=REACTOR1 Variable=DIAM Sentence=PARAM Units=meter

DIAM2 Block-Var Block=REACTOR2 Variable=DIAM Sentence=PARAM Units=meter

LEN1 Block-Var Block=REACTOR1 Variable=LENGTH Sentence=PARAM Units=meter

LEN2 Block-Var Block=REACTOR2 Variable=LENGTH Sentence=PARAM Units=meter

QF1 Block-Var Block=FH1 Variable=QCALC Sentence=PARAM Units=cal/sec

QF2 Block-Var Block=FH2 Variable=QCALC Sentence=PARAM Units=cal/sec

QCOMP Block-Var Block=B1 Variable=NET-WORK Sentence=RESULTS Units=kW

 

 

Any help will be appreciated 

 

Thank You

[PingPong]

It is as Aspen already told you: unbalanced parantheses

 

 

 

 FHCOST=10**(-2.49+0.762*LOG10((QF1+QF2))

Here you have 3 left and 2 right brackets

 

 

COMPCOST=0.00433*(QCOMP**.82))

Here you have 2 right and 1 left bracket.

 

 

Edited by PingPong, 16 March 2014 - 05:29 AM.

[Ingineer]

Dear Pingpong 

 

Thank you for pointing this out, but even when this is sorted, Aspen finds error with the specified line

 

RCOST=(0.035*(DIAM1**1.066)*(LEN1**0.082))+(0.035*(DIAM2**1.066)*(LEN2**.082))   

 

Thank You