Process Equipment and Plant Design
In a shell and tube heat exchanger, the clearance of the tube is generally

Not less than one-fourth of the tube diameter or 3/16"
More than the tube diameter
Equal to the tube diameter
More in case of triangular pitch as compared to the square pitch tube layout

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Process Equipment and Plant Design
The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles?

To provide support to the tube bundle
To reduce the induced vibration in the tubes
To increase the residence time of shell side fluid
To increase the tube side heat transfer co-efficient by inducing turbulence

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

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

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