When importing proii data into htri, it shows FLASH on Stream ‘Y1’ DID NOT SOLVE
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RT: A lengthy report on the generated properties; an excerpt is as follows: “PMassVFrac: At P=450 kPa, VF=0.00087. PRO/II FlashStream() messages for PVFMass flash: The specification could not be solved after 7 iterations. Final Temperature(K)= 1.7996, Pressure(KPa)= 450, LFRAC= 1, SPEC(given)= .99913, SPEC(calc)= 4.0177E-6, SPEC(toler)= 1E-5. The FLASH calculation for stream ‘Y1’ also failed to produce a solution.” The simulation process involves solvent regeneration, converting rich liquid into lean liquid. The client requires that there be a stream of dry gas, with the flash tank being omitted; the gas is to be separated directly from the top of the regeneration tower. It was fine when there was flashing before, but now this message appears once gas is introduced. Please, experts, tell me something{:3_51:}
Which version of PRO/II can converge when using this material with the conditions (P, VMASS%) solely within PRO/II? Which version of HTRI are you using? If it’s convenient, please send me your PRO/II file (or one that contains only material Y1), and I’ll give it a try
Thank you. I’m using version proii8.1 PJ; simulation works fine, but when importing HTRI, it keeps showing the error ‘FLASH on Stream ’Y1’ DID NOT SOLVE’. Moreover, there are at least three sets of material property data available in Input, but only two sets are used ； There is another issue: the shell side always indicates that the flow rate exceeds the critical value, which can cause damage to the equipment and pipes. I would like to know how to reduce the flow rate in the shell side {:3_57:}
This kind of problem often occurs when importing data from PRO/II into HTRI. For example, in situations involving high temperature and pressure, or in some other unexpected circumstances, warnings like TP appear. Sometimes, only two or three of the 10 temperature points that are required can be obtained. Even more bizarrely, it’s not possible to import the properties of circulating water either; one has to use the property data sets built into HTRI every time. Guys, please let me know if there’s any way to solve this issue
Normal physical property data can be obtained by removing the non-condensable gases; if there are such gases present, it’s not possible to get accurate data. Please advise
Thank you, moderator {:1_90:}