In order to reduce the heat loss through a largefurnace wall, the decision has been made to addexternal insulation. Calculate the thickness of insulationrequired to reduce the heat loss by 75%.Before the change is made, no outer steel shell is used.Data: Refractory brick and wall brick:k = 0.87 W m-1 K-1Insulation: k = 0.090 W m-1 K-1•Steel: k = 43 W m-1 K-1h = 55 W m-1 K-1 (inside furnace).h = 11 W m-1 K-1 (outside furnace). 9.3 In order to reduce the heat loss through a large furnace wall, the decision has been madeto add external insulation. Calculate the thickness of insulation required to reduce the heatloss by 75%. Before the change is made, no outer steel shell is used.Data: Refractory brick and wall brick:k = 0.87 W m¹¹ K..InsideFurnaceInsulationInsulation: k = 0.090 W m²¹ K-¹.Steel: k = 43 W m¹ K¹.h55 W m¹¹ K¹ (inside furnace).h = 11 W m¹ K¹ (outside furnace).RefractoryBrick,250 mmWallBrick,50 mmOuterSteel Shell,25 mm

One-dimensional heat transfer through a simple or composite body exposed to convection from both…

Answered: 9.3 In order to reduce the heat loss…

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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In order to reduce the heat loss through a large

furnace wall, the decision has been made to add

external insulation. Calculate the thickness of insulation

required to reduce the heat loss by 75%.

Before the change is made, no outer steel shell is used.

Data: Refractory brick and wall brick:
k = 0.87 W m-1 K-1
Insulation: k = 0.090 W m-1 K-1•
Steel: k = 43 W m-1 K-1
h = 55 W m-1 K-1 (inside furnace).
h = 11 W m-1 K-1 (outside furnace).

9.3 In order to reduce the heat loss through a large furnace wall, the decision has been made
to add external insulation. Calculate the thickness of insulation required to reduce the heat
loss by 75%. Before the change is made, no outer steel shell is used.
Data: Refractory brick and wall brick:
k = 0.87 W m¹¹ K..
Inside
Furnace
Insulation
Insulation: k = 0.090 W m²¹ K-¹.
Steel: k = 43 W m¹ K¹.
h
55 W m¹¹ K¹ (inside furnace).
h = 11 W m¹ K¹ (outside furnace).
Refractory
Brick,
250 mm
Wall
Brick,
50 mm
Outer
Steel Shell,
25 mm

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