Real exam questions on specialized knowledge of chemical engineering for 12 years
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31. A tubular heat exchanger with an outer diameter of 38 mm, a thickness of 2.5 mm, and a length of 8 m. To reduce the reactor pressure drop, it is planned to increase the number of tubes by 20% while shortening the tube length to 6.67 m. What will be the percentage change in the reactor’s pressure drop compared to the original value? A 80 B 69 C 57 D 83 Please take a look and decide which answer is correct for this question
This post was last edited by “Taking my wife on a blind date” on July 25, 2017, at 16:57. Option B should be chosen
I think it's C. The velocity u = 1.2^(-1); the pressure drop is proportional to the square of the velocity multiplied by the length, and the calculated value is c.