5 replies to this topic

[LizbethR14]

Hello,

 

I compared the results of pipe segment in Aspen HYSYS for a wet gas pipeline of about 8 kilometers long with actual field data, and found that it over predicts the pressure drop. Other than varying the roughness, what other changes can I make to close the gap?

Edited by LizbethR14, 20 September 2017 - 06:02 PM.

[Bobby Strain]

You might want to give us some screen shots from HYSYS. Along with the calculated and measured values. Have you checked using other correlations?

 

Bobby

[serra]

LizbethR14,

you should provide additional data or contact technical support,

for example, a different correlation can predict a different pressure drop,

in the same way a different thermo package can predict a different density or amount of condensate etc. etc.

recently, for a 2 Km pipeline, with another software (Prode Properties)

i have found up to 7% differences (selecting different correlations, EOS etc.)

but that depends from the specific application.

[Pan Nata]

LizbethR14,

 

You have to check what kind of correlation that you use for the simulation, your pipeline is new or not, whether your pipeline bathymetry is correct or not.

[christopherchoa]

Or check other software

 

http://www.korf.co.uk/korf_links.html

[christopherchoa]

Hi Lizbeth14,

 

found that it over predicts the pressure drop

 

A white paper produced by Aspen for multiphase flow shows Beggs and Brill over-predicts pressure drop for horizontal and incline pipelines. They suggested using Tulsa Unified, HTFS and Gregory et al. models.

 

 

Cheers,

Chris