CH E 314 Heat Transfer ASSIGNMENT 3 Sample Solution
Problem 2
Consider a plane wall in which heat is generated at a uniform rate.
The steady state temperature profile is given by the following
equation:
T=
a + b x2
Where a = 200C and b = -2000C/m2. The th

CHE 314
Heat Transfer
Assignment 5 Sample Solution
Problem1
This problem involves heat transfer from a flat plate with an unheated starting length. The diagram of the
system is as follows:
T= 20C
cm
u = 10
s
Velocity BL
Thermal boundary layer
10 cm
90 cm

CH E 314 Heat Transfer Assignment 2: Sample Solution
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PROBLEM 2
The wall is a composite plane wall. Ignore any contact resistance between the two surfaces. The
system is illustrated below.
TS1 22C
TI
cork
W
k1 0.045
mK
W
k2 1
mK
L1
15 cm
x0
x L1
TS 2 10C

CHE 314
Heat Transfer
Assignment 4
Sample Solution
This problem involves the transient heating of a sphere.
20C
T=
i
T=
100C
m2
s
= 1.6 107
1.5 cm
W
m2 K
W
k = 0.68
m K
h = 3000
First test to see if the lumped capacitance method is valid. Compute the Bio

CHE314
Heat Transfer
Assignment # 1
Problem # 2
Consider a freezer with a cubic cavity of inside dimension 2 m a side. The bottom is perfectly
insulated (no heat transfer). The material of the top and sides has a thermal conductivity of 0.03
W/m K. When t