Introduction to Heat Transfer
6th Edition
ISBN: 9780470501962
Author: Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine
Publisher: Wiley, John & Sons, Incorporated
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Chapter 3, Problem 3.125P
(a)
To determine
The equation from which the temperature distribution in a wire lead may be determined.
(b)
To determine
The temperature distribution in a wire lead.
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A 15 lb. block of brass with a specific heat of 0.089 is heated to 189°C and the immersed in 5 gal. of water at 66°C. What is the final temperature of the brass and water? Assume there is no heat loss.
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(Just write the numerical answer. Include - if the answer is negative. No need to put the unit.)
Properties of saturated water
Volume
Specific
Heat
Jkg - K
Thermal
Conductivity
k, Wim- K
Prandti
Enthalpy
Dynamic Viscosity
H. kg/m -s
Expansion
Coefficient
Number
Density
P. kgim
Saturation
of
Pr
Temp.
T, "C
B. 1/K
Liquid
Pressure
Vaporization
P, kPa
Liquid
Vapor
hg, k/kg
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
Liquid Vapor
0.0171 1.792 x 103
0.0173
0.922 x 105 13.5
0.934 x 10-5
1.00 -0.068 x 10 3
1.00
1.00
0.01
0.6113 999.8
0.8721
0.0048
0.0068
2501
2490
2478
4217
4205
1854
0.561
0.571
1.519 x 10-3
1.307 x 10-3 0.946 x 10-5
1.138 x 10 3 0.959 x 10-5
1.002 x 10 3 0.973 x 105
999.9
1857
11.2
0.015…
(a) The temperature at the surface of the heating rod, T1.
(b) If the salt solution temperature is 300 degree Celcius, what is the value of convection heat transfer coefficient, h of the salt solution ?
(c) If the heating rod is not covered by metallic cylinder and corresponds to the result of part (a) and (b), how much the rate of energy transfer to the salt solution ?
(d) Compare and discuss the difference of heat transfer with and without the matallic cylinder.
Chapter 3 Solutions
Introduction to Heat Transfer
Ch. 3 - Consider the plane wall of Figure 3.1, separating...Ch. 3 - A new building to be located in a cold climate is...Ch. 3 - The rear window of an automobile is defogged by...Ch. 3 - The rear window of an automobile is defogged by...Ch. 3 - A dormitory at a large university, built 50 years...Ch. 3 - In a manufacturing process, a transparent film is...Ch. 3 - Prob. 3.7PCh. 3 - A t=10-mm-thick horizontal layer of water has a...Ch. 3 - Prob. 3.9PCh. 3 - The wind chill, which is experienced on a cold,...
Ch. 3 - Prob. 3.11PCh. 3 - A thermopane window consists of two pieces of...Ch. 3 - A house has a composite wall of wood, fiberglass...Ch. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Work Problem 3.15 assuming surfaces parallel to...Ch. 3 - Consider the oven of Problem 1.54. 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