2016 Heat Transfer Final Exam  

Some students had already some exams planned for Friday June 17th 9:00 — 12:00 and for Friday June 17th 15:00 — 18:00. So we chose the third option: Sunday June 12th 18:00 — 21:00. I'll announce soon the room number.


June 12th 2016 18:00 — 21:00 NO NOTES OR BOOKS; USE HEAT TRANSFER TABLES THAT WERE DISTRIBUTED; ALL QUESTIONS HAVE EQUAL VALUE; ANSWER ALL 6 QUESTIONS. 





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. A bonus of 10 points will be given to the students who can derive from basic principles that $ {\cal P}={\rho u_{\rm b}^3 \pi f L D}/{8}$. 








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