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2. An electric heater with the total surface area of 0.25 m and emissivity 0.75 is in a room where the air has a
2. An electric heater with the total surface area of 0.25 m and emissivity 0.75 is in a room where the air has a temperature of 20C and the walls are at 10C. When the heater consumes 500 W of electric power, its surface has a steady temperature of 120C. Determine the temperature of the heater surface when it consumes 700 W. Solve the problem (a) assuming negligible radiation and (b) taking radiation into consideration. Th A.R T T Figure Question 2
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Fundamentals of Thermal-Fluid Sciences
Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala
5th edition
78027680, 78027683, 9781760421359, 978-0078027680
