Abstract: The phase equilibrium calculation of Kekeya condensate pool has been made using a hybrid method of the equation of state. That is accelerated iteration and interpolation in place of iteration step by step, of which a similar matrix has been adopted rather than a reverse one of Jacobi' s matrix that could hardly allow for giving solution with gradient method. The result shows that this method has advantages of fastly calculating speed and fairly good stabilities.

Key words: Kekeya condensate pool, Phase equilibrium calculation, Hybrid method, Accelerated iteration, lnterporation