Calculation problems for internal compression process heat exchangers
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There is no negative temperature difference in the heat exchanger calculations, and the ASPEN process calculations are normal; the liquid oxygen pressure is 48.5 bar. However, the heat exchanger keeps showing errors in the calculation results. Could someone please advise on the reason for this and how to resolve it? Thanks first! The error messages for the heat exchanger are as follows: THE FLASH RESULTS ARE WITHIN TOLERANCE, BUT MAY BE UNSATISFACTORY BECAUSE AN EXTRAPOLATED EOS VAPOR VOLUME ROOT WAS USED FOR PROPERTY CALCULATIONS. THE FLASH RESULTS ARE WITHIN TOLERANCE, BUT MAY BE UNSATISFACTORY BECAUSE AN EXTRAPOLATED EOS LIQUID VOLUME ROOT WAS USED FOR PROPERTY CALCULATIONS. THERE IS AN ERROR IN THE FLASH CALCULATIONS FOR THE OUTLET STREAM ‘HVO1’'
Could you send over the file so I can take a look? I’d be happy to help. It’s probably a problem with the physical property methods; it should be solvable by combining it with EDR. Of course, it can also be solved without EDR.