Two simultaneous solution type methods are proposed and compared, which solve distillation column analysis problem using the composition mapping relation as vapor-liquid equilibrium data, and they differ in linearization process of the component balance equation.
The one is "Strong interdependency method", and the other is "Weak interdependency method."
By computed results for the upper column of an air separation tower with some variety of number of trays, it is proved that the latter is much more effective one than former in points of convergency, computing time, and simplicity.