Consider a 15-cm à 20-cm printed circuit board (PCB) that has electronic components on one side. The
Question:
(a) Vertical,
(b) Horizontal with hot surface facing up,
(c) Horizontal with hot surface facing down. Take the emissivity of the surface of the board to be 0.8 and assume the surrounding surfaces to be at the same temperature as the air in the room. Evaluate air properties at a film temperature of 32.5°C and 1 atm pressure. Is this a good assumption?
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A printed circuit board PCB is placed in a room The average temperature of the hot surface of the board is to be determined for different orientations ...View the full answer
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Related Book For 
Fundamentals of Thermal-Fluid Sciences
ISBN: 978-0078027680
5th edition
Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala
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