Fundamentals of Heat and Mass Transfer
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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Chapter 1, Problem 1.2P
The heat flux that is applied to the left face of a planewall is
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1. Temperatures are measured at the left-hand face and at a point 4 cm from the left-hand
face of the planar wall shown in the figure below. These temperatures are T₁ = 45.3 °C
and T* = 21.2 °C. The heat flow through the planar wall is steady and one dimensional.
What is the value of T2 at the right-hand surface of the wall?
TI
T*
4 cm
10 cm
T2
Consider a plate whose thickness is 2L=20 cm and thermal conductivity is 44 W/mK. Heat generation
inside the plate (5x105 W/m³) is uniform. The surface of the plate is maintained at Ts=10°C. Find the
temperature at the center of plate.
T
Ts
-L
L X
O a. 45 °C
ОБ.75 °С
О с. 67 оС
O d. 90 °C
O e. 85 °C
A section of a composite wall with the dimensions shown below has uniformtemperatures of 200°C and 50°C over the left and right surfaces, respectively. If the thermal conductivities of the wall materials are: kA = 70 W/(m K), kB = 60 W/(m K), kc = 40 W/(m K) and kD = 20 W/(m K), determine the rate of heat transfer through this section of the wall and the temperatures at the interfaces.
Chapter 1 Solutions
Fundamentals of Heat and Mass Transfer
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