I'm doing my first all-grain batch tomorrow using my converted 13g rectangular cooler. Do I have these infusion/sparge calcs right?
Dusseldorf Altbier
5.25g
OG: 1.051
Efficiency: Estimated 70% since it's my first time doing all-grain
11.3 lbs. grain bill
1.5 qt/lb
Initial Grain Temp: 70F
Step 1: Protein Rest @ 131; Add 17 qts. @ 139.5F (10 min.)
Step 2: Temp Infusion to 152; Add 6.77 qts. @ 212F (60 min)
Step 3: Mash Out to 170; Add 11.2 qts. @212F (10 min)
Here's where I want to make sure I have things right so I get enough for my boil and end up with 5.25g-ish at the end. I'm shooting for 7.5g pre-boil (1g/hr. boiloff).
Assumptions:
1) .5g trub loss
2) 1g equipment loss (probably less, but i'd rather overshoot the first time)
3) .20 g/lb. grain absorption
4) 4% wort shrinkage
At mash out, before adding any sparge water, I'll have 35 qts (8.75g) in the cooler. Subtract 1g equipment loss and 2.25g loss to grain and I can get 5.5g of wort - 2g short of the 7.5g target.
So, that means I need to add 2g of 170F sparge water (batch sparge) after the mash-out to get 7.5g pre-boil wort, yes? Then I should be able to calculate my efficiency (and tweak my assumptions) and be more accurate next time? Any help would be appreciated. Thanks!
Dusseldorf Altbier
5.25g
OG: 1.051
Efficiency: Estimated 70% since it's my first time doing all-grain
11.3 lbs. grain bill
1.5 qt/lb
Initial Grain Temp: 70F
Step 1: Protein Rest @ 131; Add 17 qts. @ 139.5F (10 min.)
Step 2: Temp Infusion to 152; Add 6.77 qts. @ 212F (60 min)
Step 3: Mash Out to 170; Add 11.2 qts. @212F (10 min)
Here's where I want to make sure I have things right so I get enough for my boil and end up with 5.25g-ish at the end. I'm shooting for 7.5g pre-boil (1g/hr. boiloff).
Assumptions:
1) .5g trub loss
2) 1g equipment loss (probably less, but i'd rather overshoot the first time)
3) .20 g/lb. grain absorption
4) 4% wort shrinkage
At mash out, before adding any sparge water, I'll have 35 qts (8.75g) in the cooler. Subtract 1g equipment loss and 2.25g loss to grain and I can get 5.5g of wort - 2g short of the 7.5g target.
So, that means I need to add 2g of 170F sparge water (batch sparge) after the mash-out to get 7.5g pre-boil wort, yes? Then I should be able to calculate my efficiency (and tweak my assumptions) and be more accurate next time? Any help would be appreciated. Thanks!