Process Equipment and Plant Design
If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of

D/5 or minimum 2" to 5D
D/5 or minimum 2" to D
None of these
D/2 or minimum 2" to 5D

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

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

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

Hydrostatic head is required for refluxing the condensate
Sub cooling of condensate is desired
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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Process Equipment and Plant Design
The LMTD correction factor (FT) is defined as the

Ratio of true temperature difference to the LMTD
Ratio of LMTD to the true temperature difference
Geometric mean of the true temperature difference and the LMTD
Differenced of true temperature difference and the LMTD

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