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speciying OVHD temp. does not work. Actually by specifying Ethane recovery and Reflux ratio specs, the specs are converged but the column flowsheet is not converged. Dono why is that...

To start with, only the feed stream is completely defined and the degree of freedom is 2 therefore I add two specs to make degree of freedom 0. I have tried with adding various specs as a)Ethane mol fraction in OVHD and Propane recovery in the bottoms b) Ethane recovery in the OVHD and Propane...

Hello, I am trying to simulate a Deethaniser to give 95 mol % ethane in the OVHD and minimum Propane. It is not converging with recovery spec or vapor fraction spec in the OVHD. Can anyone give any idea how to converge the column and which specs to be used. The Feed stream contains 9.5% Ethane...

Please have a look at the column T-1002 (the 2nd one)in the attached screen shot. I want to put the condenser outlet stream (OVHD reflux) back to the column in place of ‘Reflux return’ stream and I want to add a pump in between. Now as I try to replace the ‘Reflux return’ stream with the ‘OVHD...

no the column is not underspecified. I am having trouble simulating overhead condensor and pump outside the column.

I am using Hysys. Actually I am trying to simulate the condensor and reflux with pump separately, not the ones available with the column Palette. so that I can vary the coolent medium for condensor etc. When I condense the overhead outside the column and then feed it back to the column top tray...

Hello, I have a distillation column and the overhead stream is to be condensed, pumped and some %age of the pumped liquid is to be sent back to the column as Top feed stream. As to converge the column all the feed streams to the column must be already converged, I can not converge the column if...

Hello, Can anyone please guide me on: 1) how to determine the number of stages and the feed tray location in Hysys to simulate a distillation column? 2) can any of the available column options be used to simulate the columns e.g. if i want to simulate a Condensate Stabilisation column, can i...