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Heat Exchanger

shell and tube he.

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#1 anandcpcl

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Posted 09 September 2014 - 11:33 PM

Friends,

i want to know in shell and tube heat exchanger, is there any rules in designing the hot or cold fluid entry in the shell or tube side in the top or bottom or depending on the conditions.



#2 fallah

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Posted 10 September 2014 - 03:31 AM

Hi,

 

In general:

 

Cold fluid enters at the bottom and hot fluid at the top...

 

Cold fluid enters to the shell side and hot fluid to the tube side..



#3 srfish

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Posted 10 September 2014 - 10:31 AM

Generally coolers will have the cooling water or some other cold fluid in the tube side. 



#4 oscarsender

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Posted 10 September 2014 - 11:47 AM

In my past work we call it Heated-up or Cooled-down. Fluid to be heated is arranged at upward flow (from bottom to top) while the fluid being cooled goes downward (top entry to bottom). This is preferrable but not always mandatory due to some factors or limitations that may apply.



#5 Ali_gholamalian

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Posted 10 September 2014 - 03:18 PM

Most important factor is not temperature (neither source temp. nor target), but it is corrosivity and after that fouling rate.

If clean and non-corrosive fluids are in service, then pressure will be your limit (in regular temp.)

next step is find where is nozzles, for liquids nozzle is down (prevent downfall of liquid) and gas nozzle is in top (prevent run away of vapor) also two phase fluids consider as gas flow.






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