A cylindrical resistor element on a circuit board dissipates 0.15 W of power in an environment at

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A cylindrical resistor element on a circuit board dissipates 0.15 W of power in an environment at 40°C. The resistor is 1.2 cm long, and has a diameter of 0.3 cm. Assuming heat to be transferred uniformly from all surfaces, determine

(a) The amount of heat this resistor dissipates during a 24-h period;

(b) The heat flux on the surface of the resistor, in W/m²;

(c) The surface temperature of the resistor for a combined convection and radiation heat transfer coefficient of 9 W/m2·K.

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Fundamentals of Thermal-Fluid Sciences

ISBN: 978-0078027680

5th edition

Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala

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Question Posted: Dec 04, 2018 06:13 AM

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