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The figure shows the cross section of wall made of wood of thickness La and brick of thickness La (=0.2 La). Two more layers are sandwiched between wood and brick with identical thickness and thermal conductivities. The thermal conductivity of the wood is k, and that of brick is ka (=5.0 ka). The face area A of the wall is unknown. Energy transfer through the wall is steady. The only known temperatures are T1 = 55°C, T2 = 30°C and Ts = -10°C. Apply the concept of steady-state heat transfer through conduction on the wall, and determine the interface temperature T4?

The figure shows the cross section of wall made of wood of thickness La and brick of thickness La (=0.2 La). Two more layers are sandwiched between wood and brick with identical thickness and thermal conductivities. The thermal conductivity of the wood is k, and that of brick is ka (=5.0 ka). The face area A of the wall is unknown. Energy transfer through the wall is steady. The only known temperatures are T1 = 55°C, T2 = 30°C and Ts = -10°C. Apply the concept of steady-state heat transfer through conduction on the wall, and determine the interface temperature T4?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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The figure shows the cross section of wall made of wood of thickness La and brick of thickness La (=0.2 La). Two more layers are sandwiched between wood and brick with identical thickness and thermal conductivities. The thermal conductivity of the wood is ką and that of brick is ka (=5.0 ka). The face area A of the wall is unknown. Energy transfer through the wall is steady. The only known temperatures are T1 = 55°C, T2 = 30°C and Ts = -10°C. Apply the concept of steady-state heat transfer through conduction on the wall, and determine the interface temperature T4? T T T T Indoors ん。 Outdoors L, The energy transfer per second is the same in each layer. (a) (6) (c) (d)
Transcribed Image Text:The figure shows the cross section of wall made of wood of thickness La and brick of thickness La (=0.2 La). Two more layers are sandwiched between wood and brick with identical thickness and thermal conductivities. The thermal conductivity of the wood is ką and that of brick is ka (=5.0 ka). The face area A of the wall is unknown. Energy transfer through the wall is steady. The only known temperatures are T1 = 55°C, T2 = 30°C and Ts = -10°C. Apply the concept of steady-state heat transfer through conduction on the wall, and determine the interface temperature T4? T T T T Indoors ん。 Outdoors L, The energy transfer per second is the same in each layer. (a) (6) (c) (d)
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