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Unformatted text preview: e it, the actual heat transfer rate will be overestimated since qf = M = 3.17W and our qf = 2.7 W. 2. In class 7, we looked at a packed bed filled with aluminum spheres. (20 pts) a) What will the temperature be at the surface? halfway between the center and the surface of the sphere? How about halfway between that point and the surface? a) Graph the temperature of the center of the sphere for maximum possible thermal energies of 50 % to 100 %. b) Why do we look at a sphere near the inlet? c) Is there an advantage to using copper instead of aluminum? Why or why not? a) should be approximately 275 c) temperature is probably less at the back d) The ρc of copper is > than that of the aluminum therefore can store more energy b) Centerline temperature as a function of power 350
Temperature (degrees C) 300 250 200 150 100 50 0 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 Percentage of maximum power 3. A plane wall of a furnace is fa...
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