Douglefish
Well-Known Member
- Joined
- Dec 22, 2008
- Messages
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Alright, so I'm sure that I'm mixing up some terminology somewhere, but hopefully someone can help me out. I plugged in the following to Kaiser's spreadsheet. I'm calculating efficiency for a single batch sparge, and assuming that i get 15% boil off the spreadsheet says that I should have 1.045 wort when I'm done and that would be 84.6% efficiency for 1st and 2nd runnoff (1.038.6 before boil).
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11.5 gallon recipe - 1.3 gal/hr boil off - 90 min boil
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grain weight 21.2 lbs
extract potential 80%
moisture content 4%
mash water 8 gal
conversion efficiency 97%
grain absorption (apparent) 0.12 gal/lb
dead spaces 0
Sparge Water 8 gal
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I then plug the same recipe in iBrewMaster and set it up for 80% efficiency and it says that my gravity comes out to be 1.052 with a pre-boil gravity of 1.045.
Obviously the efficiency numbers aren't calculated the same, what am I missing?
------------------------------------------------
11.5 gallon recipe - 1.3 gal/hr boil off - 90 min boil
------------------------------------------------
grain weight 21.2 lbs
extract potential 80%
moisture content 4%
mash water 8 gal
conversion efficiency 97%
grain absorption (apparent) 0.12 gal/lb
dead spaces 0
Sparge Water 8 gal
--------------------------------------
I then plug the same recipe in iBrewMaster and set it up for 80% efficiency and it says that my gravity comes out to be 1.052 with a pre-boil gravity of 1.045.
Obviously the efficiency numbers aren't calculated the same, what am I missing?