# How to calculate the temperature of an insulated heat emitting body?

1. Jun 2, 2007

### tonyjeffs

How would I calculate the temperature of a theoretical heat-emitting
body wrapped in insulation? If the temperature difference accross
the insulation layer is D, is there a linear relationship between D
and the thickness of insulation; or is it more complicated than that?

Thanks
tony

2. Jun 2, 2007

3. Jun 3, 2007

### tonyjeffs

Hi Fred
I was wondering about the insulating effect of the atmosphere on the earth, hence the question.

The graphs of pipe insulation are interesting but puzzling. It looks like the temperature difference accross the insulation is proportional to the log of heat loss. I dont understand why it's the log rather than a simple relationship.

It's a long time since I've studied physics.
I found this equation somewhere else for heat conduction, which makes sense to me, but doesn't seem to apply to the pipe insulation.
H = kA (T2 - T1)/L (H=joules/sec; A=area T=temp L=distance)

Thanks
Tony