Can anyone help me to understand how the overal heat transfer coefficient changes in an existing shell & tube exchanger if the hot side flowrate increases?
In order to calculate the maximum relief rate through PSVs on the shell side of an existing exchanger, I need to assume that the TCV on the tube (hot) side fails open - hence more heat is provided to the shell (cold) side. Looking at very long and complicated formulas scares me and I'm looking for some practical shortcuts. Please bear in mind that both shell/tube outlet temperatures will also change and are not fixed. Both sides are liquid.
Sorry, maybe a bit hard to explain in limited words, but appreciate your advices.