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 13.65P
Consider the three-surface enclosure shown. The lower plate
Determine the operating temperature of the lower plate T1and the temperature of the insulated side T3.
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Students have asked these similar questions
Two perfectly black parallel planes 1.2 by 1.2mare separated by a distance of 1.2 m.
One plane is maintained at 800 K and the other at 500 K. The plates are located in a large room
whose walls are at 300 K. What is the net heat transfer between the planes?
9. Consider the three-surface enclosure shown. The lower plate (A1) is a black disk of 200-
mm diameter and is supplied with a heat rate of 10,000 W. The upper plate (A2), a disk
coaxial to A₁, is a diffuse, gray surface with 2 = 0.8 and is maintained at T₂ = 473 K.
The diffuse, gray sides between the plates are perfectly insulated. Assume convection
heat transfer is negligible. (40 points)
(a) Determine the operating temperature of the lower plate, T₁.
(b) Determine the temperature of the insulated side, T3.
D= 0.2 m -
A2, T₂ = 473 K, &₂ = 0.8
L = 0.2 m
A3, T3, insulated
P = 10,000 W
A₁, T₁, black surface
Radiation heat transfer Example:
Q1: A large slab of steel 0.1 m thick has in it a 0.1 m-diam hole, with axis normal to
the surface. Considering the sides of the hole to be black, specify the rate of radiative
heat loss from the hole in W. The plate is at 811 K, the surroundings are at 300 K.
A₁
T₁ = 811 k
-D=0.1 m-
A₂
A3
Hole
T
S=0.1 m
Chapter 13 Solutions
Fundamentals of Heat and Mass Transfer
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The...Ch. 13 - Two parallel, aligned disks, 0.4 m in diameter and...Ch. 13 - Coatings applied to long metallic strips are cured...Ch. 13 - A molten aluminum alloy at 900 K is poured into a...Ch. 13 - A long, hemicylindrical (1-m radius) shaped...Ch. 13 - The bottom of a steam-producing still of 200-mm...Ch. 13 - A long cylindrical healer element of diameter...Ch. 13 - A radiative heater consists of a bank of ceramic...Ch. 13 - Consider a long duct constructed with diffuse,...Ch. 13 - A solar collector consists of a long duct through...Ch. 13 - The cylindrical peephole in a furnace wall of...Ch. 13 - A composite wall is comprised of two large plates...Ch. 13 - A small disk of diameter D1=50mm and emissivity...Ch. 13 - Consider a cylindrical cavity of diameter D=100mm...Ch. 13 - Consider a circular furnace that is 0.3 m long and...Ch. 13 - Consider two very large metal parallel plates. The...Ch. 13 - Two convex objects are inside a large vacuum...Ch. 13 - the diffuse, gray, four-surface enclosure with all...Ch. 13 - A cylindrical furnace for heal-treating materials...Ch. 13 - A laboratory oven bas a cubical interior chamber 1...Ch. 13 - A small oven consists of a cubical box of...Ch. 13 - An opaque, diffuse, gray (200mm200mm) plate with...Ch. 13 - A tool for processing silicon waters is housed...Ch. 13 - Consider Problem 6.17. The stationary plate,...Ch. 13 - Most architects know that the ailing of an...Ch. 13 - Boiler tubes exposed to the products of coal...Ch. 13 - Consider two very large parallel plates. 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