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

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

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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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