Composite walls with no heat generation may also be characterized by series-parallelconfigurations, as shown in the following figure. Although the heat flow is nowmultidimensional, it is often reasonable to assume one-dimensional conditions. Subject to thisassumption, two different thermal circuits may be used. For case (a), it is presumed thatsurfaces normal to the x-direction are isothermal, while for case (b), it is assumed that surfacesparallel to the x-direction are adiabatic. Different results are obtained for the total thermalresistance for conduction. Here important geometrical information and thermal conductivityinformation are as follows.Length: LE-LF-LG=LH=L=1 mArea perpendicular to x-axis: A for sections E and H, 4/2 for sections F and G where A=1 m²Thermal conductivity: ke-ke-ku-k and ke-a-k where k-50 W/(mK) and a-10.1-1) What is the total thermal resistance between T₁ and T2 for case (a), Rtota. The answershould be given in the unit of K/W.1-2)What is the total thermal resistance between Ti and 72 for case (b), Rtot,b. The answershould be given in the unit of K/W.1-3)If a is infinitely large, what is the ratio between the total thermal resistances for cases(a) and (b), Rtot,a/Rtot,b?1455-4 = 46°Area, AT₁-Lake42OTI LECA/25wwGFL(2)kg (4/2)(a)k(A/2)4(1/2)H44444k(A/2)44(472)/2

Let us denote LKA by the symbol R R = LkA= 150=0.02

1-1) What is the total thermal resistance between T₁ and 72 for case (a), Ruota. The answer should be given in the unit of K/W. 1-2) What is the total thermal resistance between Ti and 72 for case (b), Rtot,b. The answer should be given in the unit of K/W.

1-1) What is the total thermal resistance between T₁ and 72 for case (a), Ruota. The answer should be given in the unit of K/W. 1-2) What is the total thermal resistance between Ti and 72 for case (b), Rtot,b. The answer should be given in the unit of K/W.

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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