A house has outside walls made of brick with a thermal conductivity of 1.20 W/m?K. The wall thickness is 0.20 m.
(a) If the inside temperature of the wall is 20.0°C and the outside temperature of the wall is –10.0°C, determine the heat transfer rate per unit area from conduction (the conductive heat flux) for the wall.
(b) For an inside wall temperature of 20.0°C, plot the conductive heat flux through the wall for outside wall temperatures ranging from 30.0°C to 215.0°C.
(c) For an outside wall temperature of 210.0°C, plot the conductive heat flux for inside wall temperatures ranging from 15.0°C to 25.0°C. Discuss how this relates to gaining cost savings by heating a home to a lower temperature in the winter.
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