Different HETP Coefficients for Every Component

1 Influence of Different HETP Coefficients for Every Component 

Two different plants will behave similarly only if the numbers of stages for all components are equal. If the equality condition is valid for the first component, then 

Substituting this equation into the new number of stages for component 2 will result in 

Therefore, the equality condition for the number of stages is only fulfilled exactly by all components if the ratios between H ETP of the old column and that of the new column are equal for every component. Due to the different HETP coefficients for each component the equality condition can only be exactly fulfilled if 

1) Both columns have the same length but different cross section areas Due to 

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