: Consider a plane composite wall that is composed of three materials (materials A, B, and C arearranged left to right) of thermal conductivities ka = 0.24 W/m · K, kg = 0.13 W/m · K, and kcW/m - K. The thicknesses of the three sections of the wall are LA = 20 mm, Lâ = 13 mm, and Lcmm. A contact resistance of R= 10-2 m² . K/W exists at the interface between materials A and B, as3.0.50%3D20well as at the interface between materials B and C. The left face of the composite wall is insulated, whilethe right face is exposed to convective conditions characterized by h= 10 W/m² · K, T×= 20 °C.For Case 1, thermal energy is generated within material A at the rate ġa = 5000 W/m³ . For Case 2,thermal energy is generated within material C at the rate ġc = 5000 W/m³.(a) Determine the maximum temperature within the composite wall under steady-state conditions for Case1.(b) Sketch the steady-state temperature distribution on T-x coordinates for Case 1.(c) Sketch the steady-state temperature distribution for Case 2 on the same T - x coordinates used forCase 1.

Answered: : Consider a plane composite wall that…

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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Parts A-C solve carefully and label them ( use image below)
Example 2.10 Consider a 25 mm x 25 mm x 1 mm thick silicon die attached to a same size 2 mm-thick copper cap through a 0.1 mm thick thermal interface material (TIM) as shown in Figure 2.1. Convection heat transfer coefficient on the top side of the copper cap is 2500 W/m²°C. If thermal conductivity of silicon, copper, and thermal interface material are 125, 390, and 5 W/m°C, respectively, what is the total thermal resistance from the active (bottom) side of the silicon die to outside ambient?
A slab of thickness L = 0.1 m and of thermal conductivity k = 1 W/mK has the temperature distribution as T(x) = ax2 + bx + c. The boundary conditions; insulation at at x = L and a 100 W/m2 constant heat flux at x = 0. What is the temperature at the insulated surface if c = 5 °C?
Diagram of the problem, necessary formulas, clearance and numerical solution Two heat reservoirs with respective temperatures of 325 K and 275 K are brought into contact by an iron rod 200 cm long and 24 cm2 in cross section. Calculate the heat flux between the reservoirs when the system reaches its steady state. The thermal conductivity of iron at 25 ◦C is 79.5 W/m K.
Diagram of the problem, necessary formulas, clearance and numerical solution Two heat reservoirs with respective temperatures of 325 K and 275 K are brought into contact by an iron rod 200 cm long and 24 cm2 in cross section. Calculate the heat flux between the reservoirs when the system reaches its steady state. The thermal conductivity of iron at 25 ◦C is 79.5 W/m K.
A slab of thickness L = 0.1 m and of thermal conductivity k = 1 W/mK has the temperature distribution as T(x) = ax2 + bx + c. The boundary conditions; insulation at at x = L and a 100 W/m2 constant heat flux at x = 0. What is the temperature at the insulated surface if c = 5 °C?
Diagram of the problem, necessary formulas, clearance and numerical solution Two heat reservoirs with respective temperatures of 325 K and 275 K are brought into contact by an iron rod 200 cm long and 24 cm2 in cross section. Calculate the heat flux between the reservoirs when the system reaches its steady state. The thermal conductivity of iron at 25 ◦C is 79.5 W/m K.
A composite wall is made up of an external thickness of brickwork 110 mm thick inside which is a layer of fiberglass 75 mm thick. The fiberglass is faced internally by an insulating board 25 mm thick. The coefficients of thermal conductivity are as follow: Brickwork 1.5 W/m-K Fiberglass 0.04 W/m-K Insulating board 0.06 W/m-K The surface transfer coefficients of the inside wall is 3.1 W/m²-K while that of the outside wall is 2.5 W/m²-K. Take the internal ambient temperature as 10°C and the external temperature is 27°C. Determine the heat loss through such wall 6m high and 10 m long. Badly needed asap. I will rate helpful. Thank you in advance.
Thermal conductivity of G10 fiberglass is 0.3
(3) Determine the permissible value of electrical current flowing copper wire of d=2 mm diameter, covered with rubber insulation with a thickness of 8=1 mm, if it is known that the temperature of the insulation can not be larger than 333 K. The calculations assume: electrical resistance of copper wire R=5-103 Q/m, conductivity of the rubber 1=0,15 W/(m-K), of surroundings heat transfer coefficient a=8 W/(m²-K), at an ambient temperature of air t,=20°C.

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