4 replies to this topic

[flarewolf]

Hello

I need to size a PSV for a HE tube rupture case; tube side supercritical CO2 @2038 psig OP, shell side CW @80 psig OP.

I'm using the method outlined in API 520 Annex B to define the tube rupture flowrate, so I need to perform an isentropic flash from tube side P to shell side P, and table all P, T and density values for each P (20 psi steps for each calculation).

How can I perform this operation in hysys?

Thanks

 

[breizh]

Hi,

Consider these resources to support your work.

Breizh

Attached Files

•  Designing_for_Pressure_Safety_Valves_in_Supercritical_Service.pdf   170.76KB   6 downloads
•  Aspentech equations-and-example -benchmark-calculations-for-emergency-scenario-required-relief-loads_compress.pdf   10MB   6 downloads

[flarewolf]

thank you breizh

my issue now is how to extract properties from hysys for the expansion from tube side P to shell side P

[latexman]

thank you breizh

my issue now is how to extract properties from hysys for the expansion from tube side P to shell side P

You cannot use HYSYS to do the isentropic flashes, thus not needing to extract physical properties?  The boundary condition and intermediate condition physical properties should be available once you do the isentropic flashes.

[Said Salim]

You can use NIST Web book to get CO2 properties at different conditions