Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Chapter 7, Problem 7.16P
To determine
The temperature inside an RDF-fired unit and a mass burn unit.
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Which one has a higher coeffiecient of thermal expansion? High purity fused silica or Pyrex glass (borosilicate)?
What temperature is required to obtain 0.4%C at a
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steel in 2h, when 1.1% C is present at the surface?
Assume that the iron is FCC. (Please see figure 5.12
below for diffusion coefficient data. Please use your notes
for a table of erf() function values
Diffusion coefficient D (cm²/s)
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10-
10-5
10-
10-10
10-11
10-12
10-13
10-14
10-15
Temperature (°C)
2000 1500 1200 1000 900 800 700 600
Cin graphite
Mg in MgO
Ca in Cao
H in FCC iron
C in FCC iron
Fe in FCC iron
Fe in BCC iron
H in BCC iron
C in BCC iron
Fe in FeO
500
5 6 7 8 9 10 11 12 13
104
T(K)
Figure 5-12 The diffusion coefficient D as a function of reciprocal temperature for some
metals and ceramics. In this Arrhenius plot, D represents the rate of the diffusion process.
A steep slope denotes a high activation energy.
An aluminum pipe has a length of 54 m at a temperature of 10°C. An adjacent steel pipe at the same temperature is 8 mm longer. At
what temperature will the aluminum pipe be 24 mm longer than the steel pipe? Assume that the coefficient of thermal expansion for
the aluminum is 22.5x10-6/°C and that the coefficient of thermal expansion for the steel is 12.5×10-6/°C.
Chapter 7 Solutions
Solid Waste Engineering
Ch. 7 - Prob. 7.1PCh. 7 - The ideal equation for the combustion of cellulose...Ch. 7 - You serve as the president of XYZ corporation,...Ch. 7 - Prob. 7.4PCh. 7 - Prob. 7.5PCh. 7 - Prob. 7.6PCh. 7 - Prob. 7.7PCh. 7 - Prob. 7.8PCh. 7 - Prob. 7.9PCh. 7 - Cellulose is to be burned in a waste-to- energy...
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