# Tag Info

### Does good electrical conductivity imply good thermal conductivity?

Beryllium oxide is a very good electrical insulator but at the same time the best non-metal (except diamond) thermal conductor. So to summarize. In general, good thermal conductivity is correlated ...
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### Are there any materials known to be sound-insulating but thermally-conductive?

I can think of a few possible ways to approach this. Probably the first thing to look at is the design of the case itself. They generally tend to be made up of thin, flat panels riveted to a frame. ...
• 15k

### Does good electrical conductivity imply good thermal conductivity?

For metals, good electrical conductivity does indeed imply good thermal conductivity. This is known from the Wiedemann–Franz law, which gives the ratio between electronic contribution of thermal ...
• 155
Accepted

• 1,704

### Radioactive Materials to Energy AT HOME

Attempting this as a home experiment is unlikely to be feasible. https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator#241Am gives the efficiency of professional prototype designs using ...
• 12.5k
Accepted

### Winding a wire heating element after a few uses

I have not used Kanthal, but I imagine it has similar properties to nicrome. Basically when you heat the wire up and cool it quickly, it quenches the wire. To reverse this process (or avoid it all ...
• 7,469
Accepted

### How thick do I need to make the insulation in my homemade furnace?

First off, the design problem is not trivial and it looks like you have done your homework. On high temperature, small vessels like this you need to consider the 3 dimensional transfer of heat (the ...
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### Does good electrical conductivity imply good thermal conductivity?

As alluded to in the other answers, a most notable exception is diamond. Diamond is an excellent thermal conductor. The thermal conductivity of natural diamond is around 22 W/(cm·K), which makes ...
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### Calculation for heat transfer rate / cooling capacity for air cooled solid

Stagnate Gas When the gas is stagnate, view the system as though it is an extended surface (from compressor to outlet). Take the heat transfer inside the tube as having no radial component. Develop ...
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### Wall temperature of pressure cylinder - Boundary condition

There are a lot of variables to consider for a thermal analysis, but none of them require pressure as a boundary condition. As alephzero indicated in their comment, this is function of heat source ...

### How to calculate the volume of air required to keep electrical box cool?

This question can only be answered after many tests as to the convective properties of the box, it's geometry with respect to the geometry of the void, ignoring radiation. Because convection which is ...
• 21k

### How to calculate the volume of air required to keep electrical box cool?

If I get you right, there is a box having a small device that dissipates 30 Watts of heat continuously into the air. The air is blocked into a box, no way in or out. There are no fans/blowers trying ...

### Heat transfer for a copper rod

If your temperature sensor is far away from the heat source, the detected temperature may increase even after the heat gun is turned off due to a preexisting temperature gradient evening itself out.