EX1: Infinite Slab
Homework Problems
The wall of a shed is covered with insulation board two inches thick. The
thermal conductivity of the board is 0.09 W/mK.
Problem
28 - homework!
:
Determine the rate of heat flow (in watts) through a 10 feet square wall
if the outside temperature is 0°C and the inside temperature
20°C.
Problem
29 - homework!
:
If the wall were made of glass what would the heat flow be? for glass is 1.4 W/mK.
Problem
30 - homework!
:
If the wall were made of thin sheets of glass enclosing stagnant air 2
inches thick, what would be the heat flow?
for stagnant air is 0.026 W/mK.
NOTE: Stagnant air is a pretty good insulator, which is why energy-saving windows
are designed this way.
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