ME 322 PS #2 02-03 April 2008 1.A bakelite coating is to be used with a 10-mm-diameter conducting rod, whose surface is maintained at 200ºC by passage of an electrical current. The rod is in a fluid at 25ºC, and the convection coefficient is 140 W/m2K. (a)What is the critical radius associated with the coating? (b)What is the heat transfer rate per unit length for the bare rod and for the rod with a coating of Bakelite that corresponds to the critical radius? (c)How much Bakelite should be added to reduce the heat transfer associated with the bare rod by 25%? 2.An aluminum rod of 12 cm long and 1.0 cm in diameter is exposed to an environment at 20ºC. Both ends of the rod are maintained at 100ºC . The heat transfer coefficient between the rod and the environment is 1000 W/m2ºC. Calculate the heat loss from the rod. Q100 degC 100 degC environment at 20 degC 3.A nuclear fuel element of thickness 2Lis covered with a steel cladding of thickness b. Heat generated within the nuclear fuel at a rate q&is removed by a fluid at
This is the end of the preview.
access the rest of the document.
As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.
Temple University Fox School of Business ‘17, Course Hero Intern
I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.
University of Pennsylvania ‘17, Course Hero Intern
The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.