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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.

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
Problem 1.1MA
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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.
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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Which is correct in computing for the overall heat transfer coefficient, the one with Area involved in the formula or not?

Overall heat transfer coefficient = 3.42417 = 0.2920
Transcribed Image Text:Overall heat transfer coefficient = 3.42417 = 0.2920
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
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
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Why did you divide by 2 the thermal conductivity of E,F,B and C? Why not use parallel resistance calculation instead?

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Why did you not use the area for computing the overall heat transfer coefficient

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