Agricultural Engineering > GATE 2019 > Heat Transfer
A tube-in-tube counter-flow heat exchanger is heating oil from 35 °C to 77 °C by circulating hot water at 100 °C. The outlet temperature of water is 70 °C. The log-mean-temperature difference (LMTD) is
A
exactly equal to the mean arithmetic temperature difference
B
significantly greater than the mean arithmetic temperature difference
C
significantly smaller than the mean arithmetic temperature difference
D
very nearly equal to the mean arithmetic temperature difference

Correct : d

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