In a 1-1 concurrent heat exchanger, if the tube side fluid outlet temperature is equal to the shell side fluid outlet temperature, then the LMTD is_________________?
Correct answer: B. 0
- A. ∞
- B. 0
- C. Equal to the difference between hot and cold fluids inlet temperature
- D. Equal to the difference between hot fluid inlet temperature and cold fluid outlet temperature
Explanation
For concurrent flow, one terminal temperature difference is the difference between the two outlet temperatures. If those outlet temperatures are equal, this difference is zero, and the limiting logarithmic mean temperature difference is zero.
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