Log mean temperature difference in case of counter flow compared to parallel flow will be
A)same
B)more
C)less
D)depends on other factors
E)none of the above.

Question

Quizplus · Accepted Answer

In a counter flow heat exchanger, the log mean temperature difference (LMTD) is generally more than that in a parallel flow heat exchanger. This is because in counter flow, the temperature gradient between the hot and cold fluids is maintained more uniformly across the length of the heat exchanger, leading to a higher driving force for heat transfer throughout the process.

Log Mean Temperature Difference in Case of Counter Flow Compared