How to build a home CO2 carbonation system (the nozzle part)
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From: Elmo on 4 Apr 2010 23:41 On Sun, 04 Apr 2010 19:59:21 -0400, aemeijers wrote: > Perhaps a stupid question, but have you tried simply mixing frozen > concentrate with fizzy water? Or for that matter, just mixing the jug > juice half-and-half with fizzy water? Hmmm... That might be interesting. I did understand your point. What you're saying is that a blind taste test might not know the difference if we either (a) Mix 1/2 seltzer + 1/2 water, or, (b) Mix 1/2 seltzer + 1/2 juice. The pro is that this is as simple as it gets ... Of course, the obvious con might be that test (a) isn't bubbly enough and test (b) is too diluted (in addition to potentially not being bubbly enough). But it's worth a try from someone out there. BTW, I saw articles suggesting dropping a chunk of dry ice into the liquid (outside, in case it pops the top when the very cold dry ice fizzes into the not as cold liquid). That would accomplish the same thing as you are suggesting.
From: Bob F on 5 Apr 2010 01:06 Elmo wrote: > On Sun, 04 Apr 2010 19:59:21 -0400, aemeijers wrote: > >> Perhaps a stupid question, but have you tried simply mixing frozen >> concentrate with fizzy water? Or for that matter, just mixing the >> jug juice half-and-half with fizzy water? > > Hmmm... That might be interesting. > > I did understand your point. What you're saying is that a blind taste > test might not know the difference if we either > (a) Mix 1/2 seltzer + 1/2 water, or, > (b) Mix 1/2 seltzer + 1/2 juice. > > The pro is that this is as simple as it gets ... Of course, the > obvious con might be that test (a) isn't bubbly enough and test (b) > is too diluted (in addition to potentially not being bubbly enough). > > But it's worth a try from someone out there. > > BTW, I saw articles suggesting dropping a chunk of dry ice into the > liquid (outside, in case it pops the top when the very cold dry ice > fizzes into the not as cold liquid). That would accomplish the same > thing as you are suggesting. I keep a "corney keg" of water (5 gal soda keg) full of water and carbonated, with a tap. I often just put a spoonful of flavoring, like "coffee syrup flavors" into a glass and top it off with the soda water.
From: Elmo on 5 Apr 2010 01:06 On Sun, 4 Apr 2010 18:37:54 -0700, Bob F wrote: >> I agree that your upside-down suggestion is better from the >> standpoint of C02 contact with the liquid (no need to shake) > You could make a filler cap with a 5 micron air stone that reaches to the bottom > of the bottle. Or, you can shake the bottle, or just be more patient. That's another interesting idea! Looking up air stones, I find such a thing exists (aka diffusion stone): http://www.homebrewing.com/equipment/stainless-steel-air-stone.php http://www.baderbrewing.com/store/product.php?productid=21801 http://www.brewingkb.com/equipment/diffusion-stone-687.html Right now, I have August Schrader's valve (.305" OD, 32 tpi or 7.7 mm OD, 32 threads per inch), which was chosen for ease of installation (5/16th inch hole) and sealability (rubber gaskets & tie-down nut). We could put a similar threaded pipe sticking halfway on each side of the soda cap. On the bottom half (the half that goes into the bottle), we could put a hose and the 5 �m "air stone". I would assume the air stone should be large in relation to the bottom of the bottle so as to get as great a surface area as possible to bubble up since the pressure will soon equilibrate, hence the bubbling would (I guess) stop in seconds. Of course, the partial pressure of C02 is what matters so, even though the bubbling that pressurizes the 1 liter soda bottle stops, the inside of the bottle will be pressurized to 50 psi. This diffusion stone idea just might work.
From: Elmo on 5 Apr 2010 01:08 On Sun, 4 Apr 2010 18:37:54 -0700, Bob F wrote: > Shaking the bottle decreases the pressure, as the CO2 disolves into the water. > It does not increase the pressure because the pressure at the top is higher > than the stabile pressure in the CO2 in solution. Very astute observation! I love the healthy exchange of ideas!
From: LM on 5 Apr 2010 02:33
On Sun, 4 Apr 2010 22:32:48 +0000 (UTC), Elmo wrote: > http://www.truetex.com/carbonation.htm > http://jmillerid.com/wordpress/2010/03/home-carbonation/ > http://foo.net/~jmgray/carbonation/ > http://www.kk.org/cooltools/archives/001818.php > http://www.instructables.com/id/DIY-Soda-Water-&-Home-Carbonation---Pays-For-Itsel/ > http://mendax.org/2008/05/02/carbonating-water-at-home/ > http://www.inventionsthatwork.com/carbonator.htm > http://groups.google.com/group/alt.home.repair/msg/24e7cf7f24d463e5 This guy carbonates in GLASS bottles (using a 2 micron carbonation stone)! http://www.winslam.com/laramee/blog/_entry/2008/07/26/Advancing-the-State-of-DIY-Carbonation.html By the way, the air-chuck idea promoted in some of these articles doesn't work as well as connections that are constantly open to the carbon dioxide. Also, a quick call to the 800 Coca-Cola number confirms the 2-liter Coke bottles are tested at 200 psi (amazing that they get this question often). WARNING: California outlawed many brass fittings as of January 1, 2010, so those of you in the tax state may have trouble buying lead-free fittings on line (most non-California brass fittings have up to 2% lead for ease of machining). |