Q & A > Question Details
Since a turnaround, we are observing temperature crosses on BES heat exchangers (1 shell pass and 2, 4, 6 or 8 tube passes) of our crude distillation prehat train. This translates in correction factors (F) below 0.75.
How can this be possible? I thought temperature crosses was possible on pure counter-current heat exchangers only...
 
Answers
21/05/2013 A: Manas Banerjee, CGM-T, manasumi@gmail.com
One or more of your indications may be doubted first- do a heat balance on both shell and tube side and see if it closes. If not, then re-guess the indication to match them.