Process Equipment and Plant Design
In case of a continuous distillation column, increase in reflux ratio may result in the

Greater cost for the condenser coolant
Lower fixed charges for the column
Greater cost for the reboiler heat supply
All of these

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Process Equipment and Plant Design
Vertical condenser is advantageous to the horizontal condenser from operation point of view, when

Both the functions of condensation & sub cooling are carried out in a single unit
Hydrostatic head is required for refluxing the condensate
Sub cooling of condensate is desired
Only the function of condensation is to be carried out

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