4 replies to this topic

[VLCENG]

I am trying to specify a stream in Aspen HYSYS, the stream is just a pure component (more specifically Methyl Cellosolve or 2-Methoxyethanol). I give the specifications for temperature: 78.25C, pressure: 1 atm and 0 cap. fraction. I specify the molar flow and it still displays unknown flow rate. Why is that? 

Thanks for your time

[pmoneysh]

I think your stream is over-specified. specify either of the two variables and the molar flow of the component.

Edited by pmoneysh, 17 May 2021 - 06:25 PM.

[Bobby Strain]

0 cap. fraction???

 

Bobby

[StealthProg]

If its overspecified you should get a consistency error

[naga_chemeng]

Hi Vlceng,

 

No need to specify vapour fraction, unless you need Saturation Pressure or Temperature.

 

Specify Temperature 78.25 deg C and Pressure 1 atm. 

 

Enter composition molefraction =1

 

Enter molar flowrate.

 

Check Solver condition. Is it On-Hold or Active. If its On-Hold, change to Active.

 

I hope now you will get solved stream.