Jump to content



Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog

3

Boiling Liquid Or Subcooled?

vapour pressure saturation

3 replies to this topic
Share this topic:
| More

#1 andybud

andybud

    Junior Member

  • Members
  • 12 posts

Posted 28 May 2020 - 11:46 AM

Hi all,

 

I am running a calculation for a pump that is fed from a distillation column. HYSYS states the vapour pressure of the liquid if 4.5 bara. The pressure of the liquid in the system is 7 bara on the suction. Does this mean the liquid is classed as a subcooled liquid, rather than a boiling liquid?

 

Different line sizing criteria apply for each. Thanks



#2 Bobby Strain

Bobby Strain

    Gold Member

  • Members
  • 2,892 posts

Posted 28 May 2020 - 02:44 PM

To get the proper answer, provide a sketch for your system. Along with flow rate and conditions.

 

Bobby



#3 Sharma Varun

Sharma Varun

    Gold Member

  • Members
  • 125 posts

Posted 28 May 2020 - 10:37 PM

To get the proper answer, provide a sketch for your system. Along with flow rate and conditions.

 

Bobby

Agreed and please also indicate elevations in the sketch to know the head



#4 Chemitofreak

Chemitofreak

    Gold Member

  • Members
  • 244 posts

Posted 29 May 2020 - 05:54 AM

Immediate distillation column bottom is always a boiling liquid. Only after cooling the column bottom can be considered as sub-cooled liquid.

 

The pressure is high because column elevation and liquid level also play part in the suction pressure calculation.

 

As Bobby and Varun suggested post a sketch if you want precise answer.

 

Regards






Similar Topics