Heat Transfer Design Problem Set 2  






Hint: Assuming a pump efficiency of 100%, it can be shown that the pump power is related to the bulk velocity inside the pipe through the following expression: $$ {\cal P}=\frac{\rho u_{\rm b}^3 \pi f L D}{8}$$ where $L$ is the length of the pipe, $D$ is the diameter of the pipe, $f$ the friction factor, and $u_{\rm b}$ the bulk velocity inside the pipe. 

I will give a special bonus to the students who can derive from basic principles that $$ {\cal P}=\frac{\rho u_{\rm b}^3 \pi f L D}{8}$$








Note that only one question will be asked in the superquiz on Monday: I will ask you either 1 problem in the Design Project or 1 problem in Assignment #8. If you succeed this 1 problem, you will be given 6 points.



$\pi$ 