The Great Bottle Opener Giveaway

Home Brew Forums > Home Brewing Beer > Bottling/Kegging > Kegging less than 5 gallons in a 5 gallon corny

Reply
 
LinkBack Thread Tools
Old 10-15-2009, 07:01 PM   #1
Scuba
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2008
Posts: 37
Default Kegging less than 5 gallons in a 5 gallon corny

Searching, but unable to find the answer to this. Are there any problems that I can expect if I fill my 5 gallon kegs with, say, 2.5 or 3 gallons of beer? Are the processes for carbonating the same as if I used 5 gallons of beer?

__________________
Scuba is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 07:03 PM   #2
Suthrncomfrt1884
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2009
Location: Rockford, Illinois
Posts: 4,079
Liked 23 Times on 22 Posts
Likes Given: 3

Default

Same process, no problem.

__________________
He who drinks beer sleeps well. He who sleeps well cannot sin. He who does not sin goes to heaven.

Another HERMS rig...
Suthrncomfrt1884 is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 07:04 PM   #3
ibrewit
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
ibrewit's Avatar
Recipes 
 
Join Date: Oct 2007
Location: North Aurora, IL
Posts: 198
Default

+1 no problem. Have done this many times.

__________________
Who comes first to the mill, first must grind.
ibrewit is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 07:05 PM   #4
chuggs
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2009
Location: Jupiter, FL
Posts: 323
Liked 9 Times on 8 Posts

Default

A wee bit more oxidation potential...otherwise, not a problem...

__________________
chuggs is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 07:08 PM   #5
humann_brewing
More Humann than human
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
humann_brewing's Avatar
Recipes 
 
Join Date: Oct 2008
Location: the sun
Posts: 15,642
Liked 308 Times on 306 Posts
Likes Given: 18

Default

Quote:
Originally Posted by chuggs View Post
A wee bit more oxidation potential...otherwise, not a problem...
Couldn't you just purge the space with CO2 to fix that?
__________________
On tap: #79 Berliner Weisse 1.030 9/20/12, Flanders, Barleywine, Wild Blonde (1.045 blonde hopped up and fermented with WLP644), #80B rett Saison
Fermenting: #82 Galaxy IPA, #83 Black IPA
Aging: #67 Bareleywine 1.116 11/07/2012, Flanders 2 batches 1.056 and 1.060 12/12/11 and 3/26/12, Kriek, 1.052 12/11,
humann_brewing is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 07:14 PM   #6
RDWHAHB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Denver
Posts: 834
Liked 13 Times on 11 Posts
Likes Given: 1

Default

You'll use extra CO2 doing 3 gal in a 5 gal corny, but other than that there should be no ill effects.

__________________
RDWHAHB is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 07:16 PM   #7
springer
Feedback Score: 0 reviews
 
springer's Avatar
Recipes 
 
Join Date: Feb 2008
Location: Wappingers falls NY
Posts: 4,990
Liked 19 Times on 18 Posts

Default

Quote:
Originally Posted by RDWHAHB View Post
You'll use extra CO2 doing 3 gal in a 5 gal corny, but other than that there should be no ill effects.
not really .. Well maybe at first but once a full 5 gallon corny gets down to 3 then it will have the same amount of CO2 in it as one that starts with 3. The way I see it will even out at the end since you are always topping the CO2 off.
__________________

'The taxpayer: That's someone who works for the federal government but doesn't have to take the civil service examination.'- Ronald Reagan

springer is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 07:34 PM   #8
RDWHAHB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Denver
Posts: 834
Liked 13 Times on 11 Posts
Likes Given: 1

Default

The key is, "maybe at first". That first bit will never be made up. Once the 5 gallon keg gets down to 3 gallon they should take about the same CO2. But, you served 2 gallons of delicious beverage. On the 3 gallon all you've done is fill up the headspace.

It will take more CO2 (per gallon) than the 5 gallon. Not that much though.

__________________
RDWHAHB is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 08:16 PM   #9
chuggs
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2009
Location: Jupiter, FL
Posts: 323
Liked 9 Times on 8 Posts

Default

Quote:
Originally Posted by humann_brewing View Post
Couldn't you just purge the space with CO2 to fix that?

Yes...I don't know that it would actually wind up being a problem. It's just easier to get a good purge from a small headspace vs a large headspace.

If purging were perfect...refrigeration people could just purge the air out of the line with refrigerant. Unfortunately, it's not effective enough...so they wind up putting a vaccum on the system to get all the air out before they fill it with refrigerant.

I think the potential for oxidation is going to be just a wee bit higher --- than if you filled the keg w/ 5 gals of liquid.
__________________
chuggs is offline
 
Reply With Quote Quick reply to this message
Old 10-16-2009, 04:12 AM   #10
JKoravos
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2009
Location: Chelmsford, MA
Posts: 964
Liked 18 Times on 14 Posts
Likes Given: 3

Default

Quote:
Originally Posted by RDWHAHB View Post
The key is, "maybe at first". That first bit will never be made up. Once the 5 gallon keg gets down to 3 gallon they should take about the same CO2. But, you served 2 gallons of delicious beverage. On the 3 gallon all you've done is fill up the headspace.

It will take more CO2 (per gallon) than the 5 gallon. Not that much though.
More per gallon, less overall.

Presuming the keg is exactly 5 gallons, 5 gallons of beer will hold, let's say, 2.5 volumes of CO2. IOW, 12.5 gallons of CO2 at atmospheric pressure and 32F (the reference state for volumes). If the keg has 3 gallons of beer, the beer will contain 7.5 gallons of CO2. The remaining two gallons of headspace will contain pressurized CO2 at equilibrium. If the keg is being carbed at 40F, the pressure is 1.85 atm. This will account for (1.85v x 2gal=) 3.7 gallons of CO2 at 1atm and 40F, or 3.64 gallons at 1 atm and 32F. Giving you a total of 11.14 gallons total to carbonate 3 gallons to 2.5 vol in a 5 gallon at 40F.
__________________
JKoravos is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Kegging 3 gallon batches in 5 gallon kegs? qvantamon Bottling/Kegging 3 02-14-2010 10:31 PM
Kegging small batches (3.5 gallons in Corny Kegs) thesanch Bottling/Kegging 7 11-05-2009 07:56 PM
10 gallon MLT for 10 gallons. Julohan All Grain & Partial Mash Brewing 6 06-10-2009 01:13 PM
Carbing 1 Gallon in a 5 Gallon Corny Loweface Bottling/Kegging 4 09-16-2008 02:02 PM
Bad to keg 3 gallons in 5 gallon keg pcrawford Bottling/Kegging 6 04-28-2008 08:10 PM