Numerical - Total thermal resistance of composite system in series - Heat Transfer

Q.  Calculate the rate of heat flow through a composite wall of having three layers. The thicknesses of three layers are 0.5m, 1m and 0.2m respectively.
Thermal conductivity of these layers are 2.5 W/mK, 2 W/mK and 2.2 W/mK respectively. The temperature T1 and T4 are maintained at 1000 K and 200 K respectively. Take surface area of heat transfer 1 m2.

- Published on 11 Aug 15
Heat-Transfer-through-Composite-Wall.png


a. 1011.5 W/m2
b. 911.5 W/m2
c. 501.5 W/m2
d. 1211.5 W/m2

ANSWER: 1011.5 W/m2

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