How come diff. coils with the same ohms heat up differently when volts constant?.

[flexsr]

Hey let's say 3 coils all have the same resistances and all use the same battery why would the amount of heat generated be different ? I tried a .5 fused Clapton coil, a single, and a dual on my mech and it. BArely would heat up. But a .5 ohm single would glow red hot.


The Power of all 3 coils is the same right? (same ohms and same volts).
P = (V^2)/R . Volts are constant and the resistance is same amongst coils so they all have the same Power ? How could that be? The 3 heat up drastically different.

 

[SteveS45]

Surface area or the amount of metal in the coils. You basically answered it yourself. Single or dual is like doubled.

 

[daviedog]

Steve got it. Metal Mass.

The three coils OP referenced will definitely vape different. Why they were 'invented'..

 

[dustinmj]

Dual coils cut resistance in half.
You have to account for voltage drop on the battery.
Ohm's Law: V=IR... Need to account for battery limits and amps (I) before plugging into Watt's law.
Assuming you did all that, think about the dual coil situation...

P=(V^2)/R for a single coil where P=(V^2)/2R for a dual coil situation... half the power per coil, thus half the heat.

 

[Rule62]

I wish I could explain Heat Flux, in every day or layman' terms. But suffice it to say that I use Steam Engine HF function to determine my wire gauge and resistance.

 

[VHRB2014]

Wicking play`s a huge part of it also as the proper amount of wicking cools down a otherwise hot coil. And consequently too much wick can cause a cooler coil to run very hot.

 

[Bunnykiller]

each coil added reduces the "power" to the coils by the inverse of the number of coils...

1 coil = full power thru coil, 2 coils = 1/2 of the power thru each coil, 3 coils = 1/3 the power thru each coil... etc

or put this way... water flows into a bucket with 1 tube and drains at 1 gallon per minute
if the bucket has 2 tubes, then 1/2 gallon flows thru each tube in 1 minute... etc

 

[Bad Ninja]

Metal mass.

It takes longer to heat half a spool of wire than a single strand coil.

Those exotic coils with a wad of wire are the main reason we have 200+watt mods. No one vapes single strand coils at 200watts.

 

[Canadian_Vaper]

You can make a 1ohm coil out of half inch steel bar but that's a lot of metal....

1/2 inch SS Wire, 15cm inner diameter coil, 35 wraps = 1ohm

Probably would need 3x car batteries in series to fire it which would be pumping about 1300 watts out lols...

 

[flexsr]

Dual coils cut resistance in half.
You have to account for voltage drop on the battery.
Ohm's Law: V=IR... Need to account for battery limits and amps (I) before plugging into Watt's law.
Assuming you did all that, think about the dual coil situation...

P=(V^2)/R for a single coil where P=(V^2)/2R for a dual coil situation... half the power per coil, thus half the heat.

Oh. Gotcha ya now. I was actually thinking that exact same thing you mentioned when I was up all night tossing n turning and thinking of vape stuff. You explained if perfect. I get it now. .ugggh can't believe how dumb I was/am


Sent from my iPhone using Tapatalk

 

[sonicbomb]

@flexsr have a read of this article
Understanding the relationship between power and coil resistance | E-Cigarette Forum

 

[beckdg]

No one vapes single strand coils at 200watts.

Now I have to go out and get a pound or two of 16 gauge kanthal.

See what you did?

Tapatyped