USCG Exam PracticeThermodynamics and heat exchangers
Which flow arrangement in a heat exchanger allows the cold fluid outlet temperature to exceed the hot fluid outlet temperature?
- A. Parallel flow (co-current)
- B. Cross-flow
- ✓ Counter-flow (counter-current)Correct
- D. Regenerative parallel flow
Why C is correct
DOE-HDBK-1018 Vol.1 §2-2 states that in a counter-flow exchanger the cold fluid can leave hotter than the hot fluid's outlet, which is why counter-flow is preferred wherever practical.
Cited:DOE-HDBK-1018 Vol.1 §2-2