evaporation rate of diff. ingredients and what it all means?!

[xiotaki]

Hello again, ever since my first post here I have picked up a 510 and I am now happy to say that I've been smoke free for about 10 days now and I am very excited about it!

but this post is not about the good news, but about a more technical inquiry.

I found some info that are relevant to the evaporation rates of the main e-liquid ingredients , and they go like this...
boiling point of:
ethanol (87'C)
water (100'C)
PG (188'C)
nicotine (247'C)
VG (290'C)

Now with this in mind my first question is this:

For those of us that don't direct drip, and actually use cartomizers for instance, will most likely experience a significant change in the vape from a full cart towards a half full cart. it seems that toward the later part of a vape session, you will be left with a significantly higher concentration of vg and nicotine (if vg is part of the mixture), since all the other ingredients should evaporate faster when the heating element gets to work, hence changing the percentages of the mixture still left in the carto. Does that sound right?

And second question and most important:

I heard how alot of vapers claim how a bigger, more powerful e-cig such as the eGo ( lets say in comparison to a regular 510) helps with the throat hit, hence allowing them to effectively lower the nicotine amount of their liquids. But I am a bit skeptical of these claims, since I am under the impression that the higher voltage and lower resistance allows for more liquid to be evaporated and inhaled. So is it possible that the lower nic claims are compensated and nullified by the possibility that they are indeed vaping greater amounts, hence using up more e-liquid on a daily basis, thus tricking themselves into thinking that they have made a positive change? Why would a better e-cig, have such different effects on what's going on with the nicotine?

Could it be the fact that having such a high evaporation temp. nicotine is more effectively being atomized with e-cigs that generate higher temperatures? That would suggest that a lower temp -ecig's cartomizer for instance, would have a significant build up of nicotine sediment left in it. If that's true, then you're not effectively inhaling less nicotine with a better/stronger e-cig, you're simply evaporating the nicotine in the mixture more effectively thus not having as much nicotine waste/sediment.

Does that sound like a good theory? I would love to hear yall's take on this!

 

[madjack]

...just my take...the numbers given are for each item individually...when all mixed together, they vaporize together...there may be some diff but I'd bet it is very little...one thing though, as the wattage(heat) goes up, the amt of juice vaporizing increases so, you will certainly get a more effective nic/throat hit since there is more vapor to begin with...I guess.........
madjack

 

[kinabaloo]

Fractional distillation - yes, to some extent, though it is never perfect with miscible liquids, it's as though the higher BPs are lowered; besides some percentage of the liquid is simply 'spat out' without vaporising.

Though the maximum temperature at the coil may go higher, the main effect is to heat more of the liquid; if the heater was fully immersed in the liquid - which it isn't, it's a liquid/air mix, though optimally mostly liquid - the temperature wouldn't rise; but it will to some extent, aided by the vapor creating some insulation of the coil (gasses have far lower heat capacities). In other words, a good design, in trying to create a 'bigger' vape, will spread out that power rather than simply create a hotter coil.

More input power will vaporise more liquid. But also are more likely to exacerbate decomposition of VG and certain flavorings or sweeteners (not to mention the filler). That aside, on moving to a higher performance battery (still 3.7v) - able to sustain peak current better, hence more power, higher temperature - e-liquids change taste (in particular, the very sweet taste of standard e-liquid almost disappears; not sure why).

++++

ps : put a blob of water on a suacer and a blob of VG on another saucer. The water will be gone in hours. The VG will still be there after weeks.

 

[dormouse]

I never run a carto down more than 1/2 way unless I am not paying attention or the carto fools me. I keep them topped off to avoid singeing and get 7+ days use out of each. I also use very little VG.

 

[kinabaloo]

I never run a carto down more than 1/2 way unless I am not paying attention or the carto fools me. I keep them topped off to avoid singeing and get 7+ days use out of each. I also use very little VG.

Good advice. The more viscous (thicker) the liquid, the slower the wicking / fluid dispersion, and the more likely overheating will occur.

It would be great if one day cartomisers / attys had temperature control to avoid at least filler burning (I mean internal control, not a user dial). This wouldn't preclude high performance, but limit the input power when the liquid was insufficient (either because the filler was running dry; or temporarily starved of liquid at the coil.

When in good contact with e-liquid the coil will rise to about 100 - 150C (well, next to the coil); without good liquid contact (which absorbs the heat energy and uses it to boil), the coil can easily reach 400C+, easily enough to char plastic.

Ways this could be done: (crude but could work) detect the glow of an overheating coil (visible light); detect the change in the coil's resistance with temperature, over that when cold; have a nearby - or better, connected - temperature sensor.

 

[madjack]

I'm with Ms 'mouse...I like to not go past 50-75% of capacity before topping up...a wet carto is a happy carto...and makes for HAPPY VAPING..........
madjack

 

[xiotaki]

thx for the replies so far. But so far, it is fair to say that a better product does in no way effectively help with lowering the actual nicotine intake of a vaper. It seems that it all comes down to a longer lasting / faster acting atomization(i just made up a word! lol)

 

[madjack]

I would say that a better product increases nicotine intake for a given level in a juice...atomization...not new... atomization
madjack

 

[xiotaki]

ah, my browser's spellchecker lied to me