1 reply to this topic

[gmcgough600]

Hi,

 

I'm trying to model a condensate removal system where gas could potentially break through from a high pressure natural gas system. The upstream pressure is 240 barg (3481 psig) which means that it is supercritical (at 20 °C). I want to determine the flowrate that would occur through a restrictor which is installed (a ~30 cm long, 9.5 mm diameter section of pipework). The downstream pressure is atmospheric.

 

I've tried this in both HYSYS and Aspen Hydraulics but can't get the model to solve, it appears that HYSYS can't handle choked flow and Hydraulics can't handle supercritical fluids. Any suggestions?

 

Thanks in advance

[serra]

you can model the short pipe restriction with Fauske (Homogeneous) or similar models,

if your simulator can't solve directly probably you can input the number,

I use a different tool (the constant energy flash in PRODE PROPERTIES) but maybe you can do something equivalent.