How to adjust when the heat transfer coefficients on the cold and hot sides of a heat exchanger differ too much?
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Seeking expert advice: I have calculated for a heat exchanger, and the heat transfer coefficients on the cold and hot fluid sides differ significantly. Diesel flows on the shell side, while desulfurized residue flows on the tube side. However, the calculated heat transfer coefficient for the shell side is 309 W/m2-K, while that for the tube side is 1771 W/m2-K. Isn’t this difference too large? All other parameters meet the required standards; it’s just this heat transfer coefficient that is not ideal.
There is a problem with this heat transfer coefficient; it’s better to change the design
Thank you all. Personally, I think it’s better to switch to a different approach; the spacing between the baffles doesn’t have a significant impact, and it’s also not possible to adjust the flow velocity on the shell side to an appropriate value. Thank you everyone