Why wattage, what we care about is current!

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93gc40

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I think you have your terms mixed 93gc40. What I wrote in bold above is correct. I believe when you said the underlined in your post you mean more or less voltage rather than power (watts), which is totally correct :)

You are right I used power, instead of specifing Volts, amps, or watts which are all measurements of electrical power.
 

GoBlue88

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You are right I used power, instead of specifing Volts, amps, or watts which are all measurements of electrical power.


Power is a measure of energy/time. Only wattage is a measure of power of the variables that you mentioned. If we were talking about dropping a ball from a roof, voltage would be somewhat like the height of the roof (the drop), so that ball will have higher potential energy (which will be converted to potential energy at the bottom of the drop right before it hits the ground). Not a perfect analogy, but you get the idea. Amps are a measuring of current, which is neither power nor energy.

I'm still working through all this too (I hated the physics of electricity in school)
 

93gc40

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Power is a measure of energy/time. Only wattage is a measure of power of the variables that you mentioned. If we were talking about dropping a ball from a roof, voltage would be somewhat like the height of the roof (the drop), so that ball will have higher potential energy (which will be converted to potential energy at the bottom of the drop right before it hits the ground). Not a perfect analogy, but you get the idea. Amps are a measuring of current, which is neither power nor energy.

I'm still working through all this too (I hated the physics of electricity in school)

I haven't been to school in over 30 years. I forgot the strict text book definitions, long ago.. In the context of Normal conversation many terms are interchangeable. ie power and energy. I tend to use the river analogy rather than dropping a ball, when dealing with electricity. I get your point I just no longer have the ability to get the words right all the time. fact is even though not technically correct the terms watts, amps, volts and even ohms are at least on this site, interchangable, in context.
 
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Boden

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How about we come up with a new term just for vaping. I vote we call it friction fairies.

random vaper; "My Vape seems a little weak today"

Me; "are you pushing enough friction fairies through the coil?"

Rando; "probably not.. I'll turn it up. That did the trick! Thank you Super Vaper Guy!!"

Me; :)
 
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mauricem00

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Edited to add supr quickly demonstrated my argument wrong. Still feel free to read it though (there's a puppy at the end).


Long/ranty/mathy, but come along for the ride if you've got a few.

TLDR at the end

First the math:

(1) V=IR (Voltage = Current X Resistance)

(2) Wattage = VI (Voltage X Current)

So as a result

(3) W=I^2R

(4) I = Square root(W/R)


So a couple of points:

The current is the description of the energy delivered to vaporize the ejuice, and thus the vapor production/vapor heat.

Wattage is a description of the electrical work performed by the battery. It is not the energy delivered by the device. That's the current.

Take equation (3). You run a VW device at a high wattage , but a very high resistance. That's could actually be a really low vapor production/ cool vape, because your current would be small. So your doing tons of electrical work (using battery life), but not producing much current, and therefore not producing much vapor, and relatively cool vapor.

Wattage is often used as a stand in for "coolness" of vapor or the vapor production, but that really isn't necessarily true. It's only true for a constant resistance.

As a way of describing your battery capability wattage is useful, as a way of describing your vaping experience, it has to be referenced with resistance, so when people talk about wattage they are really referencing current without knowing it (or at least without explicitly referencing it)

Why does this matter:

Lets say I'm running an RDA at 1.3 ohms and 14 watts and enjoying the vapor production/throat hit/temperature (in fact, I am). What I should be doing is identifying the current associated with those specs using equation (4). I should then be using the current I discovered works for me, and dropping the resistance significantly down towards the bottom of what my mod can handle. Then, using equation (3), I can input my current which I've determined I like, the lowest resistance (or near lowest, because as coils heat up their resistance drops) that my mod can handle, and get the wattage I want to set my VW mod to. It will be significantly lower than the 14 watts described above, because, I dropped the resistance as low as I safely could. Now I'm running my desired current at a lower wattage, so I'm producing the vapor that I want while draining my battery less, because as I mentioned above wattage just tells you how fast your're draining your battery (the work being performed). You're gaining nothing by running at higher resistance than the lowest resistance (or near lowest) your mod is capable of on a variable wattage device other than draining your battery faster.

A weakness in this analysis is that dropping the resistance would require a coil build that would vary from my current build (thinner coil inner diameter, larger gauge, less coils), but for the purposes of the post I'm assuming that people aren't intensely attached to the particulars of their coil build like gauge, inner diameter, and number of coils.


TLDR: Wattage tells us how much were sapping our battery. Current tells us how much energy we're delivering to our wicked coils, thus producing vapor. Why don't we as vapors talk more about the current we're vaping at? It's the energy delivered to our ejuice, and thus the vapor produced/vapor temp.

If you made it this far, here's a puppy for your troubles. Thoughts?


3f5f837a50a5b899bcb74707bb693ad8.jpg
wattage is not just the power being drawn from the battery it is also the power being used buy the coil. wattage and the area the coil determine the heat flux of the coil the heat flux of your coil and airflow determine the temperature of your vapor. the wattage determines the amount of vapor being produced.2 amps of current thru a 0.1 ohm coil will produce a lot less vapor than 2 amps of current thru a 1.8 ohm coil. it is good that you are trying to learn about these things.
 

mauricem00

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I haven't been to school in over 30 years. I forgot the strict text book definitions, long ago.. In the context of Normal conversation many terms are interchangeable. ie power and energy. I tend to use the river analogy rather than dropping a ball, when dealing with electricity. I get your point I just no longer have the ability to get the words right all the time. fact is even though not technically correct the terms watts, amps, volts and even ohms are at least on this site, interchangable, in context.
since voltage is constant in our application a good way to think about it is to think of voltage as the speed of the ball and current as the mass or weight of the ball. energy (wattage) equals mass times (speed squared) so doubling your voltage would increase power by a factor of 4.if you use the ball off the roof analogy then gravitational acceleration comes into play making the relationship between speed and height logarithmic instead of linear and therefore not directly comparable to voltage.the fact that those terms are interchangeable on this site is a little scary.deep sub ohming without a working knowledge of ohms low can lead to serious injury.
 

93gc40

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but voltage isn't ALWAYS constant.. Only the RATED voltage of the batteries we use is constant. TC, VV and VW all work by adjusting the voltage from what the battery supplies to a voltage to produce an outcome. Even in amech the voltage changes with every push of the fire switch. The difference is HOW that voltage is adjusted or converted or consumed.
 
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