How to biuld a home CO2 carbonation system (the nozzle part)
in [Repair]
|
Prev: Pioneer Stereo Receiver SX-212, need schematic
Next: How to build a home CO2 carbonation system (the nozzle part) (was: How to biuld a home CO2 carbonation system (the nozzle part))
From: Elmo on 3 Apr 2010 20:36 I've built a home CO2 carbonation system but I have a question about carbon dioxide flow (see pictures below). http://yfrog.com/13homec02system5jx Using a tire valve and a tire chuck, I can easily fill the soda bottle empty space with 50 psi of carbon dioxide, but that only gets the water slightly bubbly. The build-it-yourself tutorials on the web say the carbon dioxide must be FLOWING and they say they remove the inside part of the automotive tire valve. I have tried both ways and have two subsequent questions: If I keep the tire valve stem (i.e., the white soda top in the photo): Q: Why doesn't the cold water get more bubbly (like soda) at 50psi? If I remove the tire valve stem (i.e., the red soda top in the photo): Q: How do I get the tire chuck to work since it won't flow w/o the stem? Q: Even if I attach the hollow tire valve directly to the CO2 hose, how can more than the headspace of the bottle FLOW into the bottle? I don't get how I can get the CO2 to "flow"; seems to me it would just be static and fill the headspace. What am I doing wrong? See pictures here: http://yfrog.com/13homec02system5jx
From: Bob F on 4 Apr 2010 16:54 Elmo wrote: > I've built a home CO2 carbonation system but I have a question about > carbon dioxide flow (see pictures below). > http://yfrog.com/13homec02system5jx > > Using a tire valve and a tire chuck, I can easily fill the soda bottle > empty space with 50 psi of carbon dioxide, but that only gets the > water slightly bubbly. > > The build-it-yourself tutorials on the web say the carbon dioxide > must be FLOWING and they say they remove the inside part of the > automotive tire valve. > > I have tried both ways and have two subsequent questions: > > If I keep the tire valve stem (i.e., the white soda top in the photo): > Q: Why doesn't the cold water get more bubbly (like soda) at 50psi? > > If I remove the tire valve stem (i.e., the red soda top in the photo): > Q: How do I get the tire chuck to work since it won't flow w/o the > stem? Q: Even if I attach the hollow tire valve directly to the CO2 > hose, how can more than the headspace of the bottle FLOW into the > bottle? > > I don't get how I can get the CO2 to "flow"; seems to me it would > just be static and fill the headspace. > > What am I doing wrong? > See pictures here: http://yfrog.com/13homec02system5jx Just keep adding CO2 every several hours until you reach the desired carbonation level. After you pressurize the airspace, the CO2 will be gradually absorbed into the water, and the pressure in the airspace will drop until it reaches equilibrium. Or, you can attach the CO2, and shake the bottle to speed the absorbtion. Beginning with the water very cold will speed the process. As you shake the bottle, the CO2 quickly disolves into the water, and you will likely hear the CO2 flow out of the regulator as you do. Do this for a bit, then turn off the CO2 (leaving it attached) and continue shaking until the pressure at the guage quits going down. The guage will then show approximately the equilibrium pressure at the current temperature of the water in the bottle. You can repeat this until you reach the desired carbonation.
From: Elmo on 4 Apr 2010 18:42 On Sun, 4 Apr 2010 13:54:45 -0700, Bob F wrote: > The guage will then show approximately the equilibrium > pressure at the current temperature of the water in the bottle. You can repeat > this until you reach the desired carbonation. I was able to carbonate (explained in a thread where I corrected the spelling of "build" in the title). Basically, there are two fundamental methods: 1. Tire valve with the stem intact ... or ... 2. Tire valve with the stem removed. It takes only about a minute to fully carbonate a liter of liquid with the stem removed. The "flow" I had trouble understanding was a static "infusion" of carbon dioxide molecules into the fluid based on the partial pressure of C02 in the air space above the liquid and the partial pressure of C02 in the liquid; not a literal air-stream flow that was discernible. Method 1, as you noted, will work; it just takes a LOT longer with static C02 pressure because it takes about 4 volumes of C02 (i.e., 4 liters) to fully carbonate 1 volume of liquid (i.e., 1 liter).
From: Wild_Bill on 6 Apr 2010 00:39 http://www.truetex.com/carbonation.htm -- Cheers, WB .............. "Elmo" <dcdraftworks(a)Use-Author-Supplied-Address.invalid> wrote in message news:hp8muh$1v7$1(a)tioat.net... > I've built a home CO2 carbonation system but I have a question about > carbon > dioxide flow (see pictures below). > http://yfrog.com/13homec02system5jx > > Using a tire valve and a tire chuck, I can easily fill the soda bottle > empty space with 50 psi of carbon dioxide, but that only gets the water > slightly bubbly. > > The build-it-yourself tutorials on the web say the carbon dioxide must be > FLOWING and they say they remove the inside part of the automotive tire > valve. > > I have tried both ways and have two subsequent questions: > > If I keep the tire valve stem (i.e., the white soda top in the photo): > Q: Why doesn't the cold water get more bubbly (like soda) at 50psi? > > If I remove the tire valve stem (i.e., the red soda top in the photo): > Q: How do I get the tire chuck to work since it won't flow w/o the stem? > Q: Even if I attach the hollow tire valve directly to the CO2 hose, how > can > more than the headspace of the bottle FLOW into the bottle? > > I don't get how I can get the CO2 to "flow"; seems to me it would just be > static and fill the headspace. > > What am I doing wrong? > See pictures here: http://yfrog.com/13homec02system5jx
From: Elmo on 6 Apr 2010 15:28
On Tue, 6 Apr 2010 00:39:48 -0400, Wild_Bill wrote: > http://www.truetex.com/carbonation.htm Indeed! That Richard J. Kinch treatise, titled " Carbonating at Home with Improvised Equipment" was what gave me the idea to build my own carbonator. He delved into the SCIENCE of it all; which gave me courage! But even that wonderful tutorial missed out on a few points. For example, "infusion" and not "flow" are what he should have used to describe how you get 4 liters of CO2 into a 1 liter bottle of Orange Juice in a closed system. Also, he didn't describe some technical points, some of which are listed in this CO2 Dynamics web site (http://www.warpig.com/paintball/technical/gasses/co2dynamics.shtml) such as a "full" tank contains only about 34% liquid CO2. But most surprising (to me), was the statement that the pressure of a co2 tank has nothing to do with the amount of co2 in the tank; the pressure (as long as there is "some" liquid in it) is always dependent solely upon the temperature. "At room temperature (70�F) it's about 853 psi." So, with my new carbon dioxide tank, I'm not sure how I tell how much co2 is left in the tank. Does anyone know how you tell when it's getting low? |