Chapter 1 Basics of Heat Transfer1-104EA spherical ball whose surface is maintained at a temperature of 170°F is suspended in the middle of a room at 70°F. The total rate of heat transfer from the ball is to be determined. Assumptions1Steady operating conditions exist since the ball surface and the surrounding air and surfaces remain at constant temperatures.2The thermal properties of the ball and the convection heat transfer coefficient are constant and uniform. PropertiesThe emissivity of the ball surface is given to be ε= 0.8. AnalysisThe heat transfer surface area is As= πD² = π(2/12 ft)² = 0.08727 ft² Under steady conditions, the rates of convection and radiation heat transfer are
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This note was uploaded on 01/14/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.