Anyone know if saturation by carbon dioxide has a time constant?
http://i.imgur.com/MSm72Tp.jpg

Swirling seems to work with these 2L bottles, where I mix 4 degrees C (or
about) water under 30 psi CO2 pressure (or about) for about 10 minutes per
bottle (give or take) because I assume "diffusion" is slow; but is
diffusion slow, or is it (nearly) instantaneous?
http://i.imgur.com/gUJnLk3.jpg

Anyone have experience with how long it should take for carbon dioxide to
diffuse into the surface layer of water, and then to diffuse deeper if I
don't swirl?

If I just plug it in for a few minutes, the water isn't bubbly enough.

If I leave it for an hour, two things that are bad happen:
1. I lose CO2 because my connections are imperfect, but worse,
2. The water warms up (meaning it will hold less C02).

If you don't know whether the diffusion "should" be instantaneous or if
there is some kind of pragmatic coefficient, that's OK. It works.

I just don't know what I'm doing and why.
Do you?

On 9/7/2017 5:11 PM, Danny D. wrote:
Anyone know if saturation by carbon dioxide has a time constant?
http://i.imgur.com/MSm72Tp.jpg

Swirling seems to work with these 2L bottles, where I mix 4 degrees C
(or about) water under 30 psi CO2 pressure (or about) for about 10
minutes per bottle (give or take) because I assume "diffusion" is slow;
but is diffusion slow, or is it (nearly) instantaneous?
http://i.imgur.com/gUJnLk3.jpg

Anyone have experience with how long it should take for carbon dioxide
to diffuse into the surface layer of water, and then to diffuse deeper
if I don't swirl?

If I just plug it in for a few minutes, the water isn't bubbly enough.

If I leave it for an hour, two things that are bad happen:
1. I lose CO2 because my connections are imperfect, but worse, 2. The
water warms up (meaning it will hold less C02).

If you don't know whether the diffusion "should" be instantaneous or if
there is some kind of pragmatic coefficient, that's OK. It works.
I just don't know what I'm doing and why.
Do you?

I have read that that using a micro aerator introducing the CO2 in very
small bubbles at the bottom of the receiving container will increwase
the rate of diffusion into the water. Shaking or splashing the water to
increase CO2/H2O contact also helps. With my corny kegs, I can hear the
gas flow in when I shake the top of the keg back and forth. Stop
shaking, and the gas flow quickly tapers down to very slow.

On Fri, 8 Sep 2017 00:11:09 -0000 (UTC), "Danny D."
wrote:

I just don't know what I'm doing and why.

Then do some remedial reading on the topic.
http://www.truetex.com/carbonation.htm
There should be sufficient theory and numbers in the article to
provide whatever it is you're asking.

Ummmm... what problem are you trying to solve? I probably don't have
an answer, but I'm curious.

Do you?

Nope. You'll get no advice from me unless you're a masochist and into
Learn By Destroying(tm).

I built my own carbonation contraption from junk in about 1973. I did
just about everything wrong, hit all the pitfalls, and didn't listen
to anyones advice. My best fizz water had a carbonic acid taste
https://en.wikipedia.org/wiki/Carbonic_acid
and lacerated my tongue because I used too much pressure. I also
tried to use room temperature water, into which CO2 refuses to
diffuse, or if I'm lucky, takes a few days with agitation. I was
fortunate and didn't produce a simulated CO2 powered water rocket, but
did manage to build credible CO2/water sprayer which might make a
usable fire extinguisher.

In 1973 the 2L bottle was just becoming available in the stores. I
had just returned from Israel, where the only economical way to buy
Coca Cola was in 2L bottles. They were everywhere. When I returned
to the USA, I temporarily switched from Coca Cola to Pepsi which was
the only drink at the time available in 2L bottles. Eventually, I
accumulated a supply of 2L bottles (which barely fit in the tiny
refrigerators of the day).

One of my few successes was to copy the common seltzer bottle and
install a siphon tube in the 2 liter PET bottle. The siphon tube
allowed me to bubble agitate the liquid from the bottom of the bottle,
thus dramatically increasing the surface area of the water, and
therefore also increasing the CO2 diffusion rate. Filling the bottle
horizontally, with a bent siphon tube, was even better. However, I
made a fundamental mistake. I had not purged the air from the top of
the 2L bottle before pressurizing, resulting in a fizzy mix of
compressed air and CO2 in carbonic acid. It's easy to tell if you've
made this mistake because the resulting fizz water tastes and smells
horrible. I also attached a gas flow meter and aquarium bubble
counter to check the CO2 flow. The flow meter range was too high and
barely moved the ball. The bubble counter range was too low causing
the initial blast of CO2 to empty the glass vial. Can't win.

Ok, enough anecdotes. Follow the instructions in the above URL or at
least double check your existing setup to see what you've missed. Good
luck.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558