Hi. I'm having a hard time figuring out how beersmith handles volumes, particularly volume lost to boil thrub and chiller. It seems entering a number here will change calculated OG and IBU's?
To exemplify my problem...
Say I brew 2 identical brews, efficiency set to 80%, 5.43 kg pale ale malt, 13% evaporation, 0 top up water, 31 liters preboil volume.
Brew 1 - I decide to dump all thrub in the fermentor and thus get 26 liters in the fermentor , Beesmith predicts OG of 1.050 (which is typically close to my actual numbers)
Brew 2 - Exactly the same as brew 1 except this time I leave all thrub in the kettle (say 7 liters...) This leaves me with 19 liters in the fermentor, 7 liters lost to thrub and a preboilvolume of 31 liters. If I plug in 19 liters batch size (what I get in the fermentor) and 7 liters lost to thrub, I get 31 liter preboil volume (correct) and and OG of 1.068 (incorrect). IBU and color calc. are off too..
Surly the amount of thrub/wort left in the kettle should not change OG or IBU of the beer? So what I'm guessing is beersmith bases calculations on "batch size", but should calculations not be based on batch size+Volume lost to boil thrub and chiller?
Or am I not thinking correctly?
To exemplify my problem...
Say I brew 2 identical brews, efficiency set to 80%, 5.43 kg pale ale malt, 13% evaporation, 0 top up water, 31 liters preboil volume.
Brew 1 - I decide to dump all thrub in the fermentor and thus get 26 liters in the fermentor , Beesmith predicts OG of 1.050 (which is typically close to my actual numbers)
Brew 2 - Exactly the same as brew 1 except this time I leave all thrub in the kettle (say 7 liters...) This leaves me with 19 liters in the fermentor, 7 liters lost to thrub and a preboilvolume of 31 liters. If I plug in 19 liters batch size (what I get in the fermentor) and 7 liters lost to thrub, I get 31 liter preboil volume (correct) and and OG of 1.068 (incorrect). IBU and color calc. are off too..
Surly the amount of thrub/wort left in the kettle should not change OG or IBU of the beer? So what I'm guessing is beersmith bases calculations on "batch size", but should calculations not be based on batch size+Volume lost to boil thrub and chiller?
Or am I not thinking correctly?