Cp/Cv for PSV calculation
Cp/Cv for PSV calculation
(OP)
Hi everybody. I'm sizing some PSVs and I have read the article "using the ideal gas Cp/Cv ratio for RV sizing" in which at the end the author concludes "In no case should the real gas specific heat ratio be used as an estimate of the isentropic expansion coefficient, as this can lead to significant under-prediction of the required discharge area for the RV". As it is said in the article I have verify that Hysys gives the real Cp/Cv, not the ideal one. Anyone know how can I calculate the ideal Cp/Cv to be used to size the RV? Changing the fluid conditions to Normal Conditions 0 atm and T = 0K? what are the "Ideal Conditions"?





RE: Cp/Cv for PSV calculation
RE: Cp/Cv for PSV calculation
RE: Cp/Cv for PSV calculation
RE: Cp/Cv for PSV calculation
lizking, good point. But to confuse us, they tell us to base the critical pres ratio on the ideal k value. Theoretically I do think the ideal k value is more correct, but given the other inaccuracies in our relief load calcs, it probably makes no difference.
RE: Cp/Cv for PSV calculation