Hot water (0 01 m3 min) enters the tube side of...

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Hot water (0.01 m³/min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m³/min) of density 800 kg/m³ and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately

A. 32

B. 37

C. 45

D. 50

Answer: Option A

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