Chemical Engineering - Heat Transfer - Discussion


In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

[A]. less than 45°C
[B]. more than 45°C
[C]. equal to 45°C
[D]. initially decreases and remains constant thereafter.

Answer: Option B


No answer description available for this question.

Mueen said: (Jul 12, 2014)  
As the temperature of the steam may be more than 99 degree c the temperature of the tube liquid on decreasing the velocity increases more than 45 degree c.

Sangram said: (Dec 1, 2016)  
Since we are giving more residence time for heating the fluid so it will be more than 45°c.

Ashik Pc said: (Feb 23, 2019)  
If reduce flow velocity. It will get more residence time for heat transfer. So the outlet temperature will increase.

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