without too much thought
the same
altought one would dissapate more energy it has more mass/area
Temperature of wire
- Thread starter olly
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without too much thought
the same
altought one would dissapate more energy it has more mass/area
gadfly56
Senior Member
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- New Jersey
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- Professional Engineer, Fire & Life Safety
Don't forget that the question supposed a constant current source. Heat dissipation per unit length will be pretty much the same.
FionaZuppa
Senior Member
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- AZ
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- Part Time Electrician (semi retired, old) - EE retired.
exactly. J per inch is ez to calc, getting the temp is a pita. temp of the wire and insualtion is highly dependent on what the "heatsink" around it looks like, which is not ez to define. i had already posted some real experimental data, which at the end failed at some time t into the experiment because the temp of the wire got hot enough to melt the rigid foam insulation sandwich and my thermo couples began to read wrong temp.
@OP - lookup my posts of that experiment on MHF, you can then create your own experiment to see how your configuration gets hot.
pre-experiment you can use:
The Neher–McGrath paper summarized years of research into analytical treatment of the practical problem of heat transfer from power cables. The methods described included all the heat generation mechanisms from a power cable (conductor loss, dielectric loss and shield loss).
their write-up covers some common scenarios and from my own testing is rather accurate.
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