A series of bricks, whose thickness are all equal to 1.3 m, are arrange according to the figure shown below 0.53 m 0.53 m A E O F B 1m C G D 1m H Thermal Conductivities 1m Material A BUDE D F G H Convective Coefficient hi 12 kW/m2-K ho 23 kW/m2-K The left side is exposed to 33 C air temperature while the right side is exposed to air at a temperature of 12 C. Assume unidirectional and steady state flow along x-direction. Neglect radiation effects K (kW/m-K) 0.50 1.3 0.50 0.75 0.75 0.5 1.3 0.3 Calculate the total heat flow, and overall heat transfer coefficient of the system. Also calculate the temperature between the interface of A and BC, E and F, G and H.
A series of bricks, whose thickness are all equal to 1.3 m, are arrange according to the figure shown below 0.53 m 0.53 m A E O F B 1m C G D 1m H Thermal Conductivities 1m Material A BUDE D F G H Convective Coefficient hi 12 kW/m2-K ho 23 kW/m2-K The left side is exposed to 33 C air temperature while the right side is exposed to air at a temperature of 12 C. Assume unidirectional and steady state flow along x-direction. Neglect radiation effects K (kW/m-K) 0.50 1.3 0.50 0.75 0.75 0.5 1.3 0.3 Calculate the total heat flow, and overall heat transfer coefficient of the system. Also calculate the temperature between the interface of A and BC, E and F, G and H.
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter2: Steady Heat Conduction
Section: Chapter Questions
Problem 2.18P: Estimate the rate of heat loss per unit length from a 5-cm ID, 6-cm OD steel pipe covered with...
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Transcribed Image Text:A series of bricks, whose thickness are all equal to 1.3 m, are arrange according to the figure
shown below
0.53 m
0.53 m
A
E
-O
F
B
1m
C
G
D
1m
H
Thermal Conductivities
1 m
Material
A
B
с
D
E
Convective Coefficient
hi 12 kW/m2-K
ho=23 kW/m2-K
The left side is exposed to 33 C air temperature while the right side is exposed to air at a
temperature of 12 C. Assume unidirectional and steady state flow along x-direction. Neglect
radiation effects
F
G
H
K (kW/m-K)
0.50
1.3
0.50
0.75
0.75
0.5
1.3
0.3
Calculate the total heat flow, and overall heat transfer coefficient of the system.
Also calculate the temperature between the interface of A and BC, E and F, G and H.
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Follow-up Question
Which is correct in computing for the overall heat transfer coefficient, the one with Area involved in the formula or not?
Transcribed Image Text:Overall heat transfer coefficient =
3.42417
= 0.2920
Transcribed Image Text:Overall heat transfer coefficient of the system.
QUAAT
Q
AXAT
1. U =
6.133
(1.06x1.3)x(33-12)
|U= 0.21194 KW/m²+k
Solution
by Bartleby ExpertFollow-up Question
Why did you divide by 2 the thermal conductivity of E,F,B and C? Why not use parallel resistance calculation instead?
Solution
by Bartleby ExpertFollow-up Question
Why did you not use the area for computing the overall heat transfer coefficient
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