I have it tweaked on my computer, but want to adjust it on my iPad and iPhone so that I.
BEERSMITH GRAIN ABSORPTION HOW TO
You may just want to try to do it a few times and through trial and repeat attempts to dial in your volumes with your system. I cannot figure out how to adjust the grain absorption on mobile. I get about 0.1 gal/lb for BIAB when I do not do an extended gravity drain or squeeze, and 0.08 gal/lb when I do. So let's convert: 0.96 fl oz/oz 0.12 gal/lb. Water To Grain Ratio 2.7 (litres of water per kilogram of grain. Normally we use gal/lb for absorption, at least I do. I don't boil hard anymore, however, so YMMV. The Calculations used in the Recipe Creator on the app are as follows: Sparge Volume Preboil Volume Mash Volume + (Grain Weight x Grain Absorption Ratio) Pre Boil Volume Batch Volume + Post Boil Losses + Boil Off Volume. In this case a 0 apparent grain absorption rate translates to a 0.058 gal/lb true absorption rate, since the total wort volume in the mash is 8.699 gal. Might be possible if you use a hydraulic or pneumatic filter press to lauter the mash. Over the course of a few batches, I have determined that it comes down to 14-14.125 gallons of initial strike water for most of my lagers of 1044 to 1048 OG (18-20 pounds of grain) for an 11 gallon batch after boil off and cooling. Ok, but 0 gal/lb apparent grain absorption is not feasible in a homebrew setting. L/kg when using metric units, and qt/lb when using gal/. I do a BIAB with mash recirculation and use a simple small pan lid as a mash press to squeeze out the full measure of wort from the bag after mashing. Grain Absoprtion Rate: Amount of water absorbed by the grain per unit of grain.
I don't know the Beersmith tinkering necessary to achieve the result in advance, but as Denny always said about batch sparging is that you run off the first batch and determine how much sparge water to add based on what was collected and what is needed for the start of the boil to get where you want in terms of final volume, knowing that there will be no more than that coming out after adding the sparge water to the saturated grains.
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