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The flat wall given below is formed by the series and parallel arrangement of layers A, B, C, D and E. The thicknesses of A, B, C layers are 50 mm, 30 mm and 70 mm, respectively, and the thicknesses of D and E layers are equal and 80 mm. There is a uniform heat generation of 7.7x105 W/m3 in layer A, and there is no heat generation in layers B, C, D and E. The surface of the A surface open to the atmosphere is completely insulated. The air at 18 oC is continuously supplied from the outer surface of the D and E layers (h= 1020 W/m2.K) to cool it. The interface and surface temperatures of the D and E layers are the same. a) Calculate the heat transfer rate that will be transferred by the mechanism. b) Calculate the outer surface temperatures of the wall and the interface temperatures between the layers. Thermal conductivities: KA= 88 W/m K, kB 112 W/mK, kc 186 W/m K, k₂= 126 W/mK, KE= 201 W/m K

The flat wall given below is formed by the series and parallel arrangement of layers A, B, C, D and E. The thicknesses of A, B, C layers are 50 mm, 30 mm and 70 mm, respectively, and the thicknesses of D and E layers are equal and 80 mm. There is a uniform heat generation of 7.7x105 W/m3 in layer A, and there is no heat generation in layers B, C, D and E. The surface of the A surface open to the atmosphere is completely insulated. The air at 18 oC is continuously supplied from the outer surface of the D and E layers (h= 1020 W/m2.K) to cool it. The interface and surface temperatures of the D and E layers are the same. a) Calculate the heat transfer rate that will be transferred by the mechanism. b) Calculate the outer surface temperatures of the wall and the interface temperatures between the layers. Thermal conductivities: KA= 88 W/m K, kB 112 W/mK, kc 186 W/m K, k₂= 126 W/mK, KE= 201 W/m K

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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The flat wall given below is formed by the series and parallel arrangement of layers A, B, C, D and E. The thicknesses of A, B, C layers are 50 mm, 30 mm and 70 mm, respectively, and the thicknesses of D and E layers are equal and 80 mm. There is a uniform heat generation of 7.7x105 W/m3 in layer A, and there is no heat generation in layers B, C, D and E. The surface of the A surface open to the atmosphere is completely insulated. The air at 18 oC is continuously supplied from the outer surface of the D and E layers (h= 1020 W/m2.K) to cool it. The interface and surface temperatures of the D and E layers are the same. a) Calculate the heat transfer rate that will be transferred by the mechanism. b) Calculate the outer surface temperatures of the wall and the interface tem atures between the laye Thermal conductivities: KA= 88 W/m K, kB = 112 W/mK, kc 186 W/m K, kp 126 W/m K, KE= 201 W/m K A B D E 50 cm 3 m.
Transcribed Image Text:The flat wall given below is formed by the series and parallel arrangement of layers A, B, C, D and E. The thicknesses of A, B, C layers are 50 mm, 30 mm and 70 mm, respectively, and the thicknesses of D and E layers are equal and 80 mm. There is a uniform heat generation of 7.7x105 W/m3 in layer A, and there is no heat generation in layers B, C, D and E. The surface of the A surface open to the atmosphere is completely insulated. The air at 18 oC is continuously supplied from the outer surface of the D and E layers (h= 1020 W/m2.K) to cool it. The interface and surface temperatures of the D and E layers are the same. a) Calculate the heat transfer rate that will be transferred by the mechanism. b) Calculate the outer surface temperatures of the wall and the interface tem atures between the laye Thermal conductivities: KA= 88 W/m K, kB = 112 W/mK, kc 186 W/m K, kp 126 W/m K, KE= 201 W/m K A B D E 50 cm 3 m.
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