All Questions answered in full with full working out shown please

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All Questions answered in full with full working out shown please

Answered Same DayDec 20, 2021

Answer To: All Questions answered in full with full working out shown please

David answered on Dec 20 2021
99 Votes
1) (a) Solution:
Given:
Conductivity of the wall,
Inner surface temperature,
Outer
surface temperature,
Thickness of firebricks,
So, heat transfer per unit time through the wall for unit area
can be given by:
̇
( )


( )

Again, for
Heat transfer per unit time, ̇
Hence,
Heat losses through the furnace wall per hour,
(b) Solution:
Thermal conductivities as given are:
Firebricks,

Insulating brick,

Ordinary brick,

Also,
Now,
(i) Thermal resistance of each layer:
Firebricks,


Surface area is not mentioned. So, assuming surface area of furnace to be constant and equal to 1
m
2
, thermal resistance of firebricks can be calculated as:




Similarly,
Insulating brick,







And,
Ordinary brick,






(ii) Heat loss per unit area
The three layers of wall are in series so, the equivalent resistance from the...
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