Discussion on Questions 21 and 22 from the 2016 Chemistry Examination Cases in the morning
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Dear sea friends, may I ask how everyone solved question 21? For question 22, it seems that the condition regarding the coefficient of friction is missing; does anyone have a detailed solution process?
For question 21, my guess is that the specific percentage increase due to the absence of K is not given; for question 22, the range of Re is provided, which can be used to calculate the coefficient of friction
For question 22, I believe that the pressure drop provides information that allows the flow velocity to be determined; the volumetric flow rate can be found based on the heat transfer amount, and the number of tubes can be calculated from that. Therefore, the friction coefficient is necessary in order to determine the flow velocity
Question 21: Given that the heat transfer coefficient increases by 3 times, is there anyone who can solve it?
How can I determine the friction coefficient using Re?