Interrelation between moving forces in some models and forms of flow organization

The equality of the number of transfer units N in some models and variants of mass transfer and also for different forms of organization of vapor and liquid flows has been proved despite the difference in the expressions for N and quantities of mass-transfer efficiencies. Theoretical computations are confirmed by practical calculations. The constancy of the number of transfer units for all plates at the same operating parameters and closeness of logarithmic-mean and arithmetic-mean values of N are shown.[PUBLICATION ABSTRACT]