Answer / sangilisaravanan

FIN TUBES INCREASES THE SURFACE AREA OF HEATING.
SO FOR THE REQUIRED QUANTITY OF HEAT TRANSFER THE EXCHANGER
MAY BE DESIGNED SMALL IN COMPARED WITH FINLESS TUBE
EXCHANGER

Answer / s.shanmugam

Fin tubes are usually used for cooling.As we see in
automobile engines constructed with fins.

Answer / anshuman

it depends on the kind of liquid to be heated and steam
requirment if high heat transfer is required with low
cosumpsion of steam we can use fin tubes

Answer / jagadesh

it is not required to heat up liquid in fin tubes by steam
because liuid has to pass trhough tube side. so if
temperature difference is more steam will undergoes
condensation and will lead high pressure drop and less heat
transfer.

Answer / dp

It depends on the htc values on the shell side. If HTC on
the shell side is higher than the tube side adding tubes
wont make much difference in terms of total heat transfer.
If the HTC value on the tube side is higher than the shell
side, adding fins will enhance the total heat transfer. For
suppose if steam is flowing on the tube side and its phase
changes during the process its good to provide fins over the
tubes. If it is other way adding fins wont make much
difference except increasing cost of the exchanger.

Answer / ahmedcool

FINS ARE USED TO INCREASE SURFACE AREA,IS LIKELY TO
TRANSFER HEAT FROM HOTTER BODY TO COLDER BODY.FINS ARE NOT
REQUIRED IN CASE OF STEAM HEATING.

Answer / amol deshpande

Yes, fin tubes are necessary. Fin tubes increases the heat surface area and reduces the thickness of shell wall required.

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