Relation between LMTD for counterflow & parallel flow - Heat Transfer

Q.  For the same inlet and exit temperatures of two fluids, the LMTD for counterflow is always
- Published on 12 Aug 15

a. smaller than LMTD for parallel flow
b. greater than LMTD for parallel flow
c. same as LMTD for parallel flow
d. unpredictable

ANSWER: greater than LMTD for parallel flow

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