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All Questions answered in full with full working out shown please
Answered Same DayDec 20, 2021

Solution

David answered on Dec 20 2021
3 Votes
1) (a) Solution:
Given:
Conductivity of the wall,
Inner surface temperature,
Outer surface temperature,
Thickness of fire
icks,
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:
Fire
icks,

Insulating
ick,

Ordinary
ick,

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


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




Similarly,
Insulating
ick,







And,
Ordinary
ick,






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