Engineering · Auxiliary — Heat Exchangers
In a shell-and-tube heat exchanger used as a lube oil cooler, the seawater normally flows:
- AThrough the shell only
- BThrough the tubes, with oil in the shell, for easier cleaning of the tubes✓ Correct
- CMixed directly with the oil
- DIn the same direction as and mixed with the oil
Explanation
Corrosive, fouling seawater is usually routed through the tubes so the tubes can be cleaned and the tube bundle protected, while the cleaner oil passes through the shell around the tubes.
Authority: Auxiliary Machinery (USCG engineering topic)
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