8 replies to this topic

[keyser soze]

hello

 

is anyone skilled in creating aspen hysys simulations of air separation units? i am looking into a study that provides 71kg/s of gaseous oxygen and having difficulty with converging the LNG heat exchagners and LP/HP columns. any help/guidance would be greatly appreciated.

 

cheers

Attached Files

•  Screen Shot 2017-12-14 at 16.51.15.png   613.94KB   18 downloads

[Padmakar Katre]

keyser soze:

 

cheers

I have an ASU model, I don't recall the source, might have prepared as part of Hysys training program.

 

I am enclosing herewith, hope it helps.
 

Attached Files

•  ASU.zip   283.89KB   294 downloads

[keyser soze]

Padmakar S Katre:

 

thank you for your reply. it seems the file you have shared was built in a newer version of aspen hysys and i cannot open it on my older version. it is reading the following error: 'file asu.hsc was created in build 100249 and cannot be read by build 90270.'

 

are you able to transform it to an older version?

many thanks

[Padmakar Katre]

keyser soze:

 

Yes it's in latest version of Aspen V10.  Ok, let me send you the older version file.

Attached Files

•  ASU.zip   201.69KB   182 downloads

[keyser soze]

recieved. thanks for your help, much appreciated

[stratovona266]

Do you guys happen to have a a cryogenic air separation unit model that only produces oxygen? Or do you guys know of a book or paper where I can find the necessary information for modelling the air separation unit? Something I can reference to.

[ciamba87]

I share the stratovona266's request. Moreover I miss some aspects in the simulation that Padmakar Katre attached: how can we remove the very low temperature coming from the argon column reboiler?

[EdenHuang]

I share the stratovona266's request. Moreover I miss some aspects in the simulation that Padmakar Katre attached: how can we remove the very low temperature coming from the argon column reboiler?

ciamba,

it was removed by a part of oxygen-enriched liquid air from the bottom of  HP column

[ciamba87]

 

 

EdenHuang,

 

Thank you for your answer, but still I cannot understand.  Firstly I made a mistake: I did not refer to boilerbut to the condenser of argon column.  Anyway, if I understood your solution is shifting part of the oxygen-enriched liquid coming from the HP column to the argon column: but the system is slightly balanced and this solution could cause a lack of "cold" in the LP column, and so there will not be an equilibrium between the HP and the LP column.  Am I wrong?