carbonation calculator: fermentation temp, cold crash temp, bottling temp? - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > carbonation calculator: fermentation temp, cold crash temp, bottling temp?

Reply
 
Thread Tools
Old 11-12-2010, 05:02 AM   #1
jigidyjim
Recipes 
 
Mar 2009
Oakland, CA
Posts: 696
Liked 3 Times on 3 Posts



Which temp do I use in a carbonation calculator?
1) the temp it fermented at
2) the temp it coldcrashed/lagered at
3) the temp it's at when the sugar is added?

Related question: Do I need to heat it up after cold crashing before bottling?

Thanks!



 
Reply With Quote
Old 11-12-2010, 11:00 AM   #2
akthor
HBT_SUPPORTER.png
Recipes 
 
May 2010
Litchfield and Brownton, MN
Posts: 1,738
Liked 66 Times on 58 Posts


Whatever temp it is at when you are carbonating it.

Like my kegs are in my fridge carbonating so the the fridge is 38F so the temp you use in the calculations is 38F.


__________________
LAKE MARION SOCIAL CLUB

 
Reply With Quote
Old 11-12-2010, 11:22 AM   #3
AnOldUR
fer-men-TAY-shuhn
HBT_LIFETIMESUPPORTER.png
 
AnOldUR's Avatar
Recipes 
 
Mar 2007
, New Jersey
Posts: 6,886
Liked 844 Times on 609 Posts


Quote:
Originally Posted by akthor View Post
Whatever temp it is at when you are carbonating it.
Wrong.

It's the highest temperature your fermenter was stored at for any significant length of time after fermentation was complete. Itís all about how much CO2 is already in suspension when you bottle. The warmer your beer is stored after fermentation, the more CO2 will leave through your airlock. Even if you chill it after this (cold crash) the CO2 in suspension will not increase. The small amount remaining in the headspace is not enough to make a difference. Once itís gone, itís gone.



Quote:
Originally Posted by jigidyjim View Post
Related question: Do I need to heat it up after cold crashing before bottling?
No, but you do need to bring the bottles up to room temperature after bottling.

 
Reply With Quote
Old 11-12-2010, 12:39 PM   #4
akthor
HBT_SUPPORTER.png
Recipes 
 
May 2010
Litchfield and Brownton, MN
Posts: 1,738
Liked 66 Times on 58 Posts


I am talking about CO2 carbing kegs you must be talking about bottling. I see now his question pertains to bottling. Keg carbing with CO2 is about the temp of the beer and psi, while it's carbing.

Quote:
Originally Posted by AnOldUR View Post
Wrong.

It's the highest temperature your fermenter was stored at for any significant length of time after fermentation was complete. Itís all about how much CO2 is already in suspension when you bottle. The warmer your beer is stored after fermentation, the more CO2 will leave through your airlock. Even if you chill it after this (cold crash) the CO2 in suspension will not increase. The small amount remaining in the headspace is not enough to make a difference. Once itís gone, itís gone.



No, but you do need to bring the bottles up to room temperature after bottling.
__________________
LAKE MARION SOCIAL CLUB

 
Reply With Quote
Old 11-12-2010, 02:07 PM   #5
AnOldUR
fer-men-TAY-shuhn
HBT_LIFETIMESUPPORTER.png
 
AnOldUR's Avatar
Recipes 
 
Mar 2007
, New Jersey
Posts: 6,886
Liked 844 Times on 609 Posts


Quote:
Originally Posted by akthor View Post
I am talking about CO2 carbing kegs you must be talking about bottling.
Actually the OP did say carbonation calculator which would imply kegging. "Priming Calculator" would have been a better choice of words.

 
Reply With Quote
Old 11-12-2010, 02:19 PM   #6
jfr1111
Recipes 
 
Sep 2010
Quebec, Quebec
Posts: 1,633
Liked 67 Times on 58 Posts


This kept bugging me too, BeerSmith says to use the temperature at bottling.

 
Reply With Quote
Old 11-13-2010, 05:20 AM   #7
jigidyjim
Recipes 
 
Mar 2009
Oakland, CA
Posts: 696
Liked 3 Times on 3 Posts


Thanks everyone. I did indeed mean priming.

 
Reply With Quote
Old 11-26-2010, 11:04 PM   #8
jigidyjim
Recipes 
 
Mar 2009
Oakland, CA
Posts: 696
Liked 3 Times on 3 Posts


Bringing this up again. It was said that you should use the warmest temperature it was stored at for any "significant amount of time".

Any rule of thumb for what that means? If I transfer from primary to secondary, I'm assuming it warms up quite a bit during that time, but it's probably only like 30 min or so?

More extreme - doing a D-rest for 2 days before lagering? Is that significant amount of time?

Finally, I wonder what temp the beer ends up at in the bottle after a bottling session... if I pull it out of a 35 degree cold crash, let it sit a bit in the room, transfer to bottling bucket, transfer to bottle... maybe it ends up at 50? maybe at room temp? Guess I should measure next time as an experiment.

Thanks.

 
Reply With Quote
Old 11-27-2010, 01:04 AM   #9
Yooper
Ale's What Cures You!
HBT_ADMIN.png
 
Yooper's Avatar
Recipes 
 
Jun 2006
UP of Michigan, Winter Texan
Posts: 69,042
Liked 7616 Times on 5360 Posts


Quote:
Originally Posted by jigidyjim View Post
Bringing this up again. It was said that you should use the warmest temperature it was stored at for any "significant amount of time".

Any rule of thumb for what that means? If I transfer from primary to secondary, I'm assuming it warms up quite a bit during that time, but it's probably only like 30 min or so?

More extreme - doing a D-rest for 2 days before lagering? Is that significant amount of time?

Finally, I wonder what temp the beer ends up at in the bottle after a bottling session... if I pull it out of a 35 degree cold crash, let it sit a bit in the room, transfer to bottling bucket, transfer to bottle... maybe it ends up at 50? maybe at room temp? Guess I should measure next time as an experiment.

Thanks.
A significant amount of time would be at least a day or two. An example is a diacetyl rest- a lot of co2 will come out of solution during that time.

A good way to use the priming calculator is to use fermentation temperature, unless it's a lager in which case use the diacetyl rest temperature, OR the highest temperature the beer was kept at for more than a day or so.


__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
I need an opinon on cold crash then bringin to temp ctufano Beginners Beer Brewing Forum 7 06-30-2010 03:20 PM
Temp too cold for lager fermentation start? csh8428 Beginners Beer Brewing Forum 10 01-19-2010 05:13 PM
After bottling, straight to cold temp or keep at room temp? CROM Beginners Beer Brewing Forum 16 10-30-2009 05:02 AM
Ideal Ambient Temp for Ales in Temp Controlled Environment? xinunix Beginners Beer Brewing Forum 4 05-12-2009 03:58 AM
Ideal ambient temp for lager fermentation temp? tinydancer Beginners Beer Brewing Forum 2 06-30-2008 03:54 PM


Forum Jump