The average velocity in the tubes of a 1-4 heat exchanger is ______________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate ?

Question

Accepted Answer

4. The average velocity is proportional to the square root of the flow rate divided by the cross-sectional area. Since the number of tubes increases from 1 to 4, and assuming constant total flow rate, the area decreases by a factor related to the number of tubes, leading to an increase in velocity.