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Jan 20, 2011. 2:58 AMfelix_tim
says:
I hear people are saying that to increase the efficiency of a thermocouple the height of wires connected to both hot and cold junctions should be the same, but what is it for?
Mar 27, 2010. 10:46 PMstatic
says:
Respectfully along the way you missed that when the junction of dissimilar metal is heated, an electrical current is created inthe circut connecting the dissimilar metals. Note in the boy mechanic article two kinds of wire are used. Look up thermocouple at Wikipedia, and also follow the links provided in that article as well. Follow the link to thermopile aticle, and follow the link there to historic thermopile generating apparatus dating back to 1840.
Your coil constructed of uninsulated wire is essentially a single turn coil of a large gauge wire. My guess is that just simply heating the wire excited the electrons enough to create a reading with your meter. You should be measuring current as well as voltage.
Your coil constructed of uninsulated wire is essentially a single turn coil of a large gauge wire. My guess is that just simply heating the wire excited the electrons enough to create a reading with your meter. You should be measuring current as well as voltage.
Nov 7, 2009. 9:46 PMfar.peter
says:
wouldn't it work better if the wire wasn't touching each other?
Jan 5, 2010. 1:18 PMR055_28
says:
Presumably rogers236 is using enamelled wire, whereby the wire is insulated, but using an invisible material, usually a layer of very thin polyurethane. Therefore the touching wires don't create an electrical circuit.
I don't think the wire was enamel covered. If you look at the pictures in step one, you'll notice I used regular wire that is used to wire houses and such. Beneath the yellow jacket are three wires: black, white, and bare copper. I took the white and black insulated wires and stripped them of their insulation.
But again, I was experimenting a little; I don't really know too much yet about the thermoelectric effect.
But again, I was experimenting a little; I don't really know too much yet about the thermoelectric effect.
Nov 13, 2009. 10:52 AMuldics
says:
Why do you try making coils in here? The only reason you get some mV is the area of different metals touching each other. A simple thermocouple. Then you could experiment with them in parallell and series. That would make it a bit more like a peltier. Or actually seebeck in your setup. But your worst problem will be thermally insulating the elements but electrically definately not insulating. And that's a problem, as thermo and electrical resistances go hand in hand.
I used coils to heat as much copper as I could at once. I realize that I don't know too much about the thermoelectric effect, but the voltage output was greater when heat was applied than without.
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