The tungsten filament described in Problem 12.29 dissipates 75 W in an evacuated spherical light bulb of

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The tungsten filament described in Problem 12.29 dissipates 75 W in an evacuated spherical light bulb of 75-mm diameter. The bulb is in quiescent air and large surroundings at a temperature of 25°C. The reflectivity of the glass is negligible, while the spectral absorptivity is characterized by the following distribution. What is the steady-state temperature of the glass bulb for a tungsten filament operating at 3000 K?

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Fundamentals of Heat and Mass Transfer

ISBN: 978-0471457282

6th Edition

Authors: Incropera, Dewitt, Bergman, Lavine

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