It will be interesting to see how close the windings can be before bridging occurs. Is there a possibility to get a more even covering with additional heat and rotation in our gravity field?
The Pyrex SS hybrid Wick
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It will be interesting to see how close the windings can be before bridging occurs. Is there a possibility to get a more even covering with additional heat and rotation in our gravity field?
Problem with any metal is that it is electrically conductive and will short out the coil, unless some type of barrier is used.
Slopes seems to have the best idea for the original intent of Dan's experiment, correct me if I'm wrong, Dan - the elimination of shorts/hot spots and the ease or cleaning/rewicking. If the coating doesn't also hinder the heat transfer or flake away, this seems like a very smart approach.
Not only that, but it uses indirect heating, heating one metal to heat another metal - very inefficient. (Although, in retrospect, the juice is probably being vaporized on the metal tube wall. But the wick will still steal some heat). Much in the same way that the glass is inefficient, hence the long warm up times.
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I guess the enamel powder (if safe & durable) does meet the original intent of this thread very well.
To me it got to be more about trying to find a method for a sealed long lasting coil. I prefer the long lasting vacuum sealed light bulb over one with an easy to change filament...I guess that would be a different topic, though. The enamel coating would probably extend the duty cycle anyway, right?
To me it got to be more about trying to find a method for a sealed long lasting coil. I prefer the long lasting vacuum sealed light bulb over one with an easy to change filament...I guess that would be a different topic, though. The enamel coating would probably extend the duty cycle anyway, right?
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So I thought I was really onto something.....2-4x the thermal conductivity of copper....non-electrically conductive....but I couldn't find an MSDS and dont know what to think about the handling precautions
Food for thought
Panasonic Pyrolytic Graphite Sheets (PGS) | Thermal Graphite Sheets
Food for thought
Panasonic Pyrolytic Graphite Sheets (PGS) | Thermal Graphite Sheets
Description says that it is heat-sinking...
Unless you are thinking it would hold the heat enough to heat the wick? Don't know if heat conductivity really relates to heat transfer, though.
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Description says that it is heat-sinking...
Heat-sinking to my understanding is heat transfer....as in a pc or cell phone the material is used to transfer the heat from the processor to a heat sink where passing air pulls heat from the heat sink....which in general is similar to what we are doing....transferring heat
I think
These are rather expensive, flexible graphite sheets. I believe they are being used as heatsinks in small electronics (cell phones, etc). Not sure about durability, if not very, think charcoal.
The expensive ones have adhesive and other things....just a 90x115mm sheet is $23-$28
There's electrical conductivity information at one of the links on the page referenced. I didn't know enough to interpret it. ...something like 10,000 S/cm and similar.
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if the graphite sheets can transfer enough electrical current to arch or cause a short, then we would be back to square one to find a coating that would prevent it....
"The siemens (SI unit symbol: S) is the unit of electric conductance and electric admittance in the International System of Units (SI). Its symbol, "S" (upper case), should not be confused with the SI symbol "s" (lower case) which is used for second. Conductance and admittance are the reciprocals of resistance and impedance respectively, hence one siemens is equal to the reciprocal of one ohm, and is also referred to as the mho. The 14th General Conference on Weights and Measures approved the addition of the siemens as a derived unit in 1971." - Wikipedia
Did a little research on the PGS graphite sheet. It sounds perfect until you get into the data a little bit. It transfers heat really well in the x and y axis but is darn near insular in the z axis. In other words a sheet will transmit heat really well in the flat plane but not through the sheet. Therefore if you rolled a small piece around a SS wick and the wrapped the coil around that it would insulate rather than transfer the heat. It all relates to the orientation of the carbon molecules in the sheet. If you could find a sheet that was insulative in the x and y and transmissive in the z axis it would be damn near perfect. Even at the quoted cost we are only talking about $.30 for a 10mm X 10mm square. That would be plenty to wrap a SS with.
Been following the coversation and thought somebody had it but, alas no.
Matt
Sent while sitting on my .... in my living room vaping away!
Been following the coversation and thought somebody had it but, alas no.
Matt
Sent while sitting on my .... in my living room vaping away!
yeah graphite conducts electricity (ie) carbon fiber ...I really got into the sapphire idea. I wonder if there are enamel powders made from sapphire or quartz. I have a source for both in tube form but not enameling powder.
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