Pipeline Toolbox
Function Reference Manual
Early Public Release DD-00011-000

3.4.1 hall_yarborough - Hall-Yarborough equation of state
z = hall_yarborough(ppr, tpr)

Computes the compressebility factor Z using the Hall-Yarborough method using the pseudo-reduced pressure and temperature.

Arguments

ppr

Pseudo-reduced pressure Ppr.

tpr

Pseudo-reduced temperature Tpr.

Returns Compressebility factor Z.

Possible Errors

Hall-Yarborough model only valid for Tpr >= 1

The Hall-Yarborough equation requires that Tpr 1.