The lining of box-type fumace is made up of a refractory layer and steelplate as shown in the figure. Steady state temperature at the surface of therefractory is 1273 K and that at the outer steel surface is 473 K. If thesteady state heat flux through the refractory-steel plate composite is1600 W/m², and heat flow is along x-direction only, the thermal contactresistance (m² K/W) between refractory and steel issteelRefractory1273KFurnace473KAmbientGiven data:Thermal conductivity of refractory = 1.2W/m-KThickness of refractory lining = 80mmThermal conductivity of steel = 32W/mKThickness of steel plate = 4mm

Answered: Image /qna-images/answer/d836307a-95ee-46b4-8394-10fe303b0a24.jpg

Answered: as shown in the figure. Steady state…

as shown in the figure. Steady state temperature at the st tory is 1273 K and that at the outer steel surface is 41 state heat flux through the refractory-steel plate c

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.11P

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Question

The lining of box-type fumace is made up of a refractory layer and steel
plate as shown in the figure. Steady state temperature at the surface of the
refractory is 1273 K and that at the outer steel surface is 473 K. If the
steady state heat flux through the refractory-steel plate composite is
1600 W/m², and heat flow is along x-direction only, the thermal contact
resistance (m² K/W) between refractory and steel is
steel
Refractory
1273K
Furnace
473K
Ambient
Given data:
Thermal conductivity of refractory = 1.2W/m-K
Thickness of refractory lining = 80mm
Thermal conductivity of steel = 32W/mK
Thickness of steel plate = 4mm

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