Heat Transfer thorugh Cable Insulation from a single source
Heat Transfer thorugh Cable Insulation from a single source
(OP)
Hey all,
I am trying to determine the heat flow into the insulation of an electrical cable with insulation from a heat source touching it at one point along its length. (Like a cylinder sitting on a hot slab) I am ignoring any convection at the moment.
I have the equation:
Q = (2pi*k*l*(T1-T2))/(ln(r1/r2))
But i believe this is for a temperature source surrounding the entire circumference and not just at a point.
Please let me know if I am wrong about the equation and if not what equation i can use to solve for the heat flow into the cable insulation.
Thanks.
I am trying to determine the heat flow into the insulation of an electrical cable with insulation from a heat source touching it at one point along its length. (Like a cylinder sitting on a hot slab) I am ignoring any convection at the moment.
I have the equation:
Q = (2pi*k*l*(T1-T2))/(ln(r1/r2))
But i believe this is for a temperature source surrounding the entire circumference and not just at a point.
Please let me know if I am wrong about the equation and if not what equation i can use to solve for the heat flow into the cable insulation.
Thanks.





RE: Heat Transfer thorugh Cable Insulation from a single source
Patricia Lougheed
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RE: Heat Transfer thorugh Cable Insulation from a single source
It's a calculation to support the experimentally proven fact that conductors running single phased in metallic conduit will melt the insulation.
I left this out to try and keep my question simple as to not create a side discussion about the experiment itself, which will surely now happen.
Thanks for your input.
RE: Heat Transfer thorugh Cable Insulation from a single source
You would appear to have at least two-dimensional heat transfer, with internal heat generation.
Probably not safe to ignore convection either.
Start with a clear statement of the problem.