CHE 381 Lecture 16: xxxPenIslandxxx
Document Summary
The flash compositions for liquid and vapor are using the rachford-rice equation and the peng. Robinson eos found in the che toolbox part iii. The following procedure is applied to all components in the stream. An initial guess for a k-value is made using saturated pressure from antoine"s equation. sat. The rachford-rich equation is solved by varying the alpha-value with goal seek. The alpha value is common across all components. i. The respective fugacity coefficients for liquid and vapor fugacity coefficients are computed using the function phic of the toolbox. I hic(x , i t p zl i. I hic(y , i t p zv i. Using the fugacity coefficients for liquid and vapor, a new k-value is computed. The old k-values are replaced with the new k-values and steps 2 to 4 are repeated until the error between the new and old k-values is less than.
