Happy HolidaySs Giveaway - Winners Re-Re-Re-Re-Drawn - 24 hours to Claim!

Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > Bottling/Kegging > Filled keg only half full, will it carb twice as fast?
Reply
 
LinkBack Thread Tools
Old 03-14-2013, 08:40 PM   #1
brevity
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2013
Posts: 72
Liked 2 Times on 2 Posts

Default Filled keg only half full, will it carb twice as fast?

Forgive the silly question.. But say I usually put 5 gallons in my keg and it takes 4 days to carb at 25psi. If I only put in 2 gallons of the same beer with the same psi, will it take less time to carbonate?

__________________
brevity is offline
 
Reply With Quote Quick reply to this message
Old 03-14-2013, 08:58 PM   #2
beaksnbeer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 1 reviews
 
beaksnbeer's Avatar
Recipes 
 
Join Date: May 2011
Location: New Port Richey, Florida
Posts: 2,827
Liked 492 Times on 326 Posts
Likes Given: 67

Default

No,I prefer the tried and true 2-3 weeks at serving pressure, burst carbing is always hit or miss in my opinion. A liquid absorbs Co2 at a rate determined by temp and pressure.

__________________
Quote:
Home of the 12 Tap keezer
beaksnbeer is offline
 
Reply With Quote Quick reply to this message
Old 03-15-2013, 01:09 AM   #3
StMarcos
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: Sebastopol, CA
Posts: 956
Liked 29 Times on 24 Posts
Likes Given: 1

Default

It's absorbing from the interface, so the diffusion front will reach the bottom of the keg more quickly if the keg is less full. In your particular instance however, with the 25psi, once the beer is pouring with the correct CO2 concentration, it will become overcarbonated over time, even if you turn the pressure down once the correct concentration is reached. If you want to ensure a faster carbonation with the correct CO2 level, my best advice is to agitate the keg while the pressure is set to the correct level for the temp of the beer.

__________________
StMarcos is offline
 
Reply With Quote Quick reply to this message
Old 03-15-2013, 01:29 AM   #4
day_trippr
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2011
Location: Stow, MA
Posts: 11,179
Liked 1379 Times on 1114 Posts

Default

The answer to the question is: Yes.

Cheers!

__________________
day_trippr is online now
 
Reply With Quote Quick reply to this message
Old 03-15-2013, 02:52 AM   #5
brevity
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2013
Posts: 72
Liked 2 Times on 2 Posts

Default

Quote:
Originally Posted by StMarcos View Post
it will become overcarbonated over time, even if you turn the pressure down once the correct concentration is reached.
I don't understand this. Couldn't I just vent the keg and lower the pressure?
__________________
brevity is offline
 
Reply With Quote Quick reply to this message
Old 03-15-2013, 03:09 AM   #6
day_trippr
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2011
Location: Stow, MA
Posts: 11,179
Liked 1379 Times on 1114 Posts

Default

Don't worry about it, that wasn't correct to begin with.

If you determined the beer had reached a proper carbonation level and turned down the regulator from the "burst carb" pressure (in this case, 25 psi) to the appropriate pressure vs beer temperature to maintain that carbonation level (refer to this chart), it would not over-carbonate...

Cheers!

__________________
day_trippr is online now
 
Reply With Quote Quick reply to this message
Old 03-15-2013, 05:45 AM   #7
brevity
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2013
Posts: 72
Liked 2 Times on 2 Posts

Default

thank you!

__________________
brevity is offline
 
Reply With Quote Quick reply to this message
Old 03-15-2013, 10:01 AM   #8
StMarcos
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: Sebastopol, CA
Posts: 956
Liked 29 Times on 24 Posts
Likes Given: 1

Default

Quote:
Originally Posted by day_trippr View Post
Don't worry about it, that wasn't correct to begin with.

If you determined the beer had reached a proper carbonation level and turned down the regulator from the "burst carb" pressure (in this case, 25 psi) to the appropriate pressure vs beer temperature to maintain that carbonation level (refer to this chart), it would not over-carbonate...

Cheers!
It would. Once the carbonation was correct at the bottom, all the beer throughout the rest of the keg would have more than the correct amount. After some time, the beer would approach having a CO2 level in between that of the top and bottom. This average would be higher than the bottom, and thus too carbonated. Simple application of Fick's Law of Diffusion.
__________________
StMarcos is offline
AnOldUR Likes This 
Reply With Quote Quick reply to this message
Old 03-15-2013, 04:29 PM   #9
brevity
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2013
Posts: 72
Liked 2 Times on 2 Posts

Default

Quote:
Originally Posted by StMarcos View Post
It would. Once the carbonation was correct at the bottom, all the beer throughout the rest of the keg would have more than the correct amount. After some time, the beer would approach having a CO2 level in between that of the top and bottom. This average would be higher than the bottom, and thus too carbonated. Simple application of Fick's Law of Diffusion.
This would be the case regardless of how much beer is in the keg, no?
Although, I usually end my force carbing at 25 psi a couple days before it would actually hit the correct carbonation anyway.
__________________
brevity is offline
 
Reply With Quote Quick reply to this message
Old 03-15-2013, 04:37 PM   #10
AnOldUR
fer-men-TAY-shuhn
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
AnOldUR's Avatar
Recipes 
 
Join Date: Mar 2007
Location: New Jersey
Posts: 6,405
Liked 653 Times on 473 Posts
Likes Given: 486

Default

It's all about surface area. Lay the half full keg on its side and it'll carb faster.

For any given pressure and temperature, this is the best way to carb faster.
Just be sure you've purged the O2.

__________________
Personal taste is one thing, but to be arrogant about yours is what makes you an a-hole. Don't be an a-hole with personal taste.
. . .This has been a PSA from your local Klubb.

Billy-Klubb
AnOldUR 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
Half still sweet, half carb'd dry cider, will this work? BierKoning Cider Forum 7 08-18-2011 09:21 AM
Half-filled bottle... capped, then tasted.... erockomania General Beer Discussion 9 11-19-2010 07:54 PM
last bottle only 3/4 filled. will it carb? fatinma Beginners Beer Brewing Forum 10 04-28-2009 03:29 PM
The mystery of the half-filled fermenter bottleopener General Beer Discussion 17 10-22-2008 02:50 AM
storing full and half full cornies? amishland Bottling/Kegging 3 06-22-2008 04:24 PM



Newest Threads

LATEST SPONSOR DEALS