Consider the transformer of .103, whose lat-eral surface
Chapter 9, Problem 9.34(choose chapter or problem)
Consider the transformer of 8.103, whose lat-eral surface is being maintained at 47?C by a forcedconvection coolant line removing 1000 W. It is desired to explore cooling of the transformer by free convec-tion and radiation, assuming the surface to have anemissivity of 0.80.(a) Determine how much power could be removed byfree convection and radiation from the lateral andthe upper horizontal surfaces when the ambienttemperature and the surroundings are at 27?C.(b) Vertical fins, 5 mm thick, 75 mm wide, and 500 mmlong, can easily be welded to the lateral surface.What is the heat removal rate by free convection if30 such fins are attached?
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