In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement ?

A. efficient

B. e fluid

C. Results in higher shell side pressure drop

D. Creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer

E. Can accomodate less number of tubes for a given shell diameter

F. Facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell

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