7th Edition

ISBN: 9780470917855

Author: Bergman, Theodore L./

Publisher: John Wiley & Sons Inc

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Textbook Question

Chapter 13, Problem 13.106P

Cylindrical pillars similar to those of Problem 4.22 are positioned between the glass sheets with a pillar-to-pillar spacing of W. The inside surface of one glass sheet is treated with a low-emissivity coating characterized by ε 1 = 0.05 . The second inner surface has an emissivity of ε 2 = 0.95 . Determine the ratio of conduction to radiation heat transfer through a square unit area of dimension W × W for W = 10 , 20 , and 30 mm. The stainless steel pillar is located at the center of the unit area and has a length of L = 0.4 mm and diameter of D = 0.15 mm . The contact resistances and glass temperatures are the same as in Problem 4.22.

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Chapter 13, Problem 13.105P

Chapter 13, Problem 13.107P

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Fundamentals of Heat and Mass Transfer

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Solution Summary: The author explains the ratio of conduction to radiation heat transfer through a square unit area of dimension Wtimes W.

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