Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470917855
Author: Bergman, Theodore L./
Publisher: John Wiley & Sons Inc
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Textbook Question
Chapter 13, Problem 13.42P
Consider two very large parallel plates with diffuse, gray surfaces.
Determine the irradiation and radiosity for the upper plate. What is the radiosity for the lower plate.What is the net radiation exchange between the plates per unit area of the plates?
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An opaque surface with the prescribed spectral, hemispherical reflectivity distribution is subjected to the spectral irradiation shown.
Assume that p₁ = 0.5 and G₁ = 650 W/m²-μm.
G₁
1.0
P₁
0 5
10
15
λ(um)
(a) Determine the total irradiation on the surface, in W/m².
G =
W/m²
(b) Determine the radiant flux that is absorbed by the surface, in W/m².
Gabs = i
W/m²
(c) What is the total, hemispherical absorptivity of this surface?
α = i
G₂(W/m².μm)
5
10
15
20
λ (um)
Eat
И
5000 6000 7000 2(A)
Chapter 13 Solutions
Fundamentals of Heat and Mass Transfer
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