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Low Velocity Heat Exchanger Issues


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#1 SadiqChemy

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Posted 17 November 2017 - 04:32 AM

If I have to design heat exchenger between same fluid and the flow rate of these fluids are very small ( around 3300 lb/h ) . If I got positive overdesign but the velocity of shell fluid and tube fluid very low ( less than 0.2 m/s) . Is that problem ? Will that result fouling problems ? The fluids are glycol solution.

#2 srfish

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Posted 17 November 2017 - 03:35 PM

Low velocities can b a problem unless there is good filtration of the glycol. At low velocity the glycol can pick up undesirables like rust and sand.



#3 SadiqChemy

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Posted 18 November 2017 - 04:09 AM

Low velocities can b a problem unless there is good filtration of the glycol. At low velocity the glycol can pick up undesirables like rust and sand.


So , using twisted tape is recommended.?

What about shell fluid ? I reduced baffle spacing , cut and still velocity is too low !

#4 srfish

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Posted 18 November 2017 - 10:38 AM

The lean solution should be in the shell side since it would have less undesirables.






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