Process Equipment and Plant Design
In condenser, the cooling water is passed in the tube side in a pass arrangement, because

Pressure drop is reduced
It makes condenser compact
More thinner tubes can be used
It reduces heat transfer area

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Process Equipment and Plant Design
Bubble cap tray is the most commonly used tray in large distillation column, because

It eliminates the foaming and entrain-ment tendency during operation
Of its flexibility and nearly constant efficiency under varying conditions of operation
It incurs less pressure drop as compared to any other try designed for the same duty
None of these

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