Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 11 (Q.No. 11)
11.
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
Discussion:
5 comments Page 1 of 1.
Avinash kumar singh said:
4 years ago
Actually, it's a constant surface temperature case. By energy balance, we have two factors (HTC and Mass flow rate) that depend on exit temperature. When we replace values we get to know that the exit temperature will increase. (For better clarity just do the energy balance).
Mueen said:
1 decade ago
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.
Ashik Pc said:
7 years ago
If reduce flow velocity. It will get more residence time for heat transfer. So the outlet temperature will increase.
(1)
Sangram said:
9 years ago
Since we are giving more residence time for heating the fluid so it will be more than 45°c.
(2)
Afjal said:
8 months ago
The correct answer is Less than 45°C.
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