Kegconnection Complete Starter Kit and More Giveaway!


Home Brew Forums > Home Brewing Beer > Brewing Software > Beersmith 2 cooling shrinkage bug

Reply
 
LinkBack Thread Tools
Old 07-01-2012, 01:42 AM   #1
Budzu
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Chattanooga, TN
Posts: 793
Liked 16 Times on 15 Posts

Default Beersmith 2 cooling shrinkage bug

I've discovered a problem with beersmith in that it changes anticipated gravity with the default 4% cooling volume shrinkage. To see what I mean go to the boiloff tool, and compare the finishing gravity with 4% shrinkage to 0% shrinkage.
The anticipated gravity changes if you put in ANY shrinkage. This doesn't make sense. Its like it expects you to read your gravity without any temperature correction.

Is this a real bug or am I misinterpreting something? Should I report this to the BS people? Its a major problem because it changes my recipes by .003 or more. The beer doesn't lose sugars when it cools does it??

__________________
Countertop Brutus Budzu-style
Budzu is offline
 
Reply With Quote Quick reply to this message
Old 07-03-2012, 10:42 PM   #2
Xaphoeous
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
Xaphoeous's Avatar
Recipes 
 
Join Date: Jan 2011
Location: Kaihoro, Phonebox
Posts: 4,224
Liked 775 Times on 760 Posts
Likes Given: 58

Default

Subscribed, patiently awaiting answer!

__________________
mmmmmmmmmmmm, beeeeer
Xaphoeous is online now
 
Reply With Quote Quick reply to this message
Old 07-05-2012, 01:43 PM   #3
Huff360
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2010
Location: Madison, Alabama
Posts: 419
Liked 50 Times on 40 Posts
Likes Given: 9

Default

Quote:
Originally Posted by Budzu View Post
The beer doesn't lose sugars when it cools does it??
No. It "gains" sugar.

Here are my settings -
Starting vol - 6
SG - 1.050
Evap - 10%
Boiltime - 60

With Shrinkage = 0 the Post Boil Gravity = 1.056
With Shrinkage set to 4 = 1.058

That is the correct behavior. Let's say you have a pound of sugars in there. If you have 0 shrinkage, you have 5.4 gallons. But when you put in 4% shrinkage, your volume drops to 5.18 gallons.

So, you've still got the same amount of sugar in a smaller volume of water, therefore you get a higher gravity.
__________________
Huff360 is offline
 
Reply With Quote Quick reply to this message
Old 07-06-2012, 03:51 PM   #4
Budzu
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Chattanooga, TN
Posts: 793
Liked 16 Times on 15 Posts

Default

Yep that makes sense now!... what made it confusing for me is measuring my post boil volume hot with a dip stick, then taking a corrected, chilled gravity. I did not incorporate that cooling shrinkage properly. (my volume was unshrunk, and my gravity sample was chilled.)
Good thing beersmith does the math for me. Now to just calibrate everything right... brewing 4 gallon batches makes errors magnify (I usually brew 2 bbl's).

__________________
Countertop Brutus Budzu-style
Budzu is offline
 
Reply With Quote Quick reply to this message
Old 07-06-2012, 08:48 PM   #5
infection
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Southern NJ
Posts: 200
Liked 4 Times on 4 Posts
Likes Given: 9

Default

it shrinks???? I WAS IN THE POOL!!!!!!!!!!!!!!!
infection is offline
 
Reply With Quote Quick reply to this message
Old 07-06-2012, 08:59 PM   #6
chumpsteak
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2011
Location: Meridian, ID
Posts: 845
Liked 92 Times on 78 Posts
Likes Given: 10

Default

now that's funnay

__________________
chumpsteak 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
FWH Beersmith Julohan Brewing Software 16 12-14-2011 09:11 PM
New to Beersmith, help! ChadChaney Brewing Software 1 12-01-2011 10:42 AM
Beersmith 2.0 kcross13 Brewing Software 3 10-04-2011 03:52 PM
BeerSmith: cooling % means what, exactly? Judochop Brewing Software 3 06-08-2010 07:01 PM
Beersmith SRM Ó Flannagáin Brewing Software 1 09-19-2007 08:46 PM