General virial equation of state

Virial equations of state are based on a selection of powers of the following expansion:

where

P is the pressure

V is the molar volume

R is the universal gas constant

T is the temperature

B is the second virial coefficient

C is the third virial coefficient

The number of virial coefficients present in the equation depends on the type of virial equation of state that you use. For example, the Hayden-O'Connel, BWRS, and Lee-Kesler equations of state are all types of virial equations of state and use different forms of the general virial equation of state in their formulations.

Of the various types of virial equations of state, only the Hayden-O'Connell equation of state is currently available in AVEVA Process Simulation. See HOCV — Hayden-O'Connell equation of state for more information.