Q1 a) The hot combustion gases of a furnace are separated from the ambient air and its surroundings, which are at 25°C, by a brick wall 0.15 m thick (Figure la). The brick has a thermal conductivity of 1.2 W/m K and a surface emissivity of 0.8. Under steady-state conditions an outer surface temperature of 100°C is measured. Free convection heat transfer to the air adjoining the surface is characterized by a convection coefficient of h = 20 W/m2.K. What is the brick inner surface temperature?
Q1 a) The hot combustion gases of a furnace are separated from the ambient air and its surroundings, which are at 25°C, by a brick wall 0.15 m thick (Figure la). The brick has a thermal conductivity of 1.2 W/m K and a surface emissivity of 0.8. Under steady-state conditions an outer surface temperature of 100°C is measured. Free convection heat transfer to the air adjoining the surface is characterized by a convection coefficient of h = 20 W/m2.K. What is the brick inner surface temperature?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:T1
-T2
= 100° C
E = 0.8
Tur = 25° C-
sur
9 ad
Combustion
9 cond
gases
9'conv
11
T = 25° C
h = 20 W/m2-K
k = 1.2 W/m• K
EL = 0.15m-
Air
Figure la
Transcribed Image Text:Q1 a) The hot combustion gases of a furnace are separated from the ambient air and its
surroundings, which are at 25°C, by a brick wall 0.15 m thick (Figure la). The brick
has a thermal conductivity of 1.2 W/m K and a surface emissivity of 0.8. Under
steady-state conditions an outer surface temperature of 100°C is measured. Free
convection heat transfer to the air adjoining the surface is characterized by a
convection coefficient of h = 20 W/m2.K. What is the brick inner surface
temperature?
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