gizzygizmo
Brewer
- Joined
- Mar 17, 2019
- Messages
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I've noticed trub loss is decoupled from batch size when calculating OG. You have a choice:
1) just ignore the slight variation, it's usually only 2-3 points off OG
2) Set trub loss to 0, set batch size to actual ending kettle, set BH eff to Mash Eff sinze you now have 0 losses
How to repeat:
1) Create new recipe of 5g batch size
2) zero out shrinkage, boil off rate, and trub size
3) Add 5 lbs of D-180 or other 1.032 PPG sugar
You're OG is now 1.032 which is correct in a perfect world. Expand your trub loss to 1 gallon now. Notice your Post boil volume is now 6 gallons to account for the 1 gallon of loss into the ferment.
However, the OG has stayed at 1.032. You can change trub loss to 0 and make batch size 6 to see the correct 1.027 OG.
1) just ignore the slight variation, it's usually only 2-3 points off OG
2) Set trub loss to 0, set batch size to actual ending kettle, set BH eff to Mash Eff sinze you now have 0 losses
How to repeat:
1) Create new recipe of 5g batch size
2) zero out shrinkage, boil off rate, and trub size
3) Add 5 lbs of D-180 or other 1.032 PPG sugar
You're OG is now 1.032 which is correct in a perfect world. Expand your trub loss to 1 gallon now. Notice your Post boil volume is now 6 gallons to account for the 1 gallon of loss into the ferment.
However, the OG has stayed at 1.032. You can change trub loss to 0 and make batch size 6 to see the correct 1.027 OG.