A wall has inside temperature 134 Celsius and outside temperature 24 Celsius. Its area is 2 m^2 and its uniform thickness is .12 m. What is the temperature gradient from inside to outside?
If the inside temperature decreased, thereby increasing the temperature difference by a factor of 1.562, what would be the temperature gradient?
The temperature changes by -110 Celsius through the .12 m thickness of the wall. The average temperature gradient (which is the temperature change per unit of distance) is therefore
If the temperature difference increases by factor 1.562, the temperature gradient, which is proportional to the temperature difference, will change by the same factor. Thus the new temperature gradient will be
The average temperature gradient is the average temperature change per unit of distance:
If the thickness of a wall is `dx and the inside and outside temperatures of the wall surface are T2 and T1, then `dT = T2 - T1 and