7th Edition

ISBN: 9780470501979

Author: Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine

Publisher: Wiley, John & Sons, Incorporated

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Textbook Question

Chapter 13, Problem 13.93P

A small oven consists of a cubical box of dimension L = 0.1 m , as shown. The floor of the box consists of a heater that supplies P = 400 W . The remaining walls lose heat to the surroundings outside the oven. which maintains their temperatures at T 3 = 400 K . A spherical object of diameter D = 30 mm is placed at the center of the oven. Sometime after the sphere is placed in the oven, its temperature is T 1 = 420 K . All surfaces have emissivities of 0.4.

Chapter 13, Problem 13.93P, A small oven consists of a cubical box of dimension L=0.1m , as shown. The floor of the box consists
(a) Find the following view factors: F₁₂, F₁₃, F₂₁, F₃₁, F₂₃, F₃₂, F₃₃.
(b) Determine the temperature of the floor and the net rate of heat transfer leaving the sphere due to radiation. Is the sphere under steady-state conditions?

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Chapter 13, Problem 13.91P

Chapter 13, Problem 13.94P

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Chapter 13 Solutions

Fundamentals of Heat and Mass Transfer

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Solution Summary: The author calculates the view factor using the reciprocity. The length of the surface is L=0.1m.

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