In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is__________________?
Correct answer: D. Equal
- A. More
- B. Less
- C. Much more
- D. Equal
Explanation
For fixed terminal temperature differences, the LMTD calculation uses the same two end differences for both flow arrangements. Hence counterflow and parallel flow have equal LMTD under the stated condition, although counterflow normally provides better temperature driving force for other specified conditions.
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