Page 445 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2

Properties of Hydrocarbon Mixtures 407

Calculate K Values

1

Adjust assumed I
I vapor I liquld composltion

Figure 6-28. Block diagram for two-phase equilibrium calculations.
temperature and the flash calculation becomes similar in principle to a bubble
point or dew point calculation. The flash calculation equation described earlier,
Equation 6-23, can be coupled with the temperature or pressure adjusting
algorithms described forth bubble point/dew point calculations to perform these
calculations. Initial estimates of the vapor or liquid phase compositions must