FunkedOut
FunkedOver
- Joined
- Mar 23, 2017
- Messages
- 850
- Reaction score
- 418
I need a hand wrapping my head around moving from single vessel BIAB to a 2 vessel rig.
Particularly setting up the mash profile in BeerSmith.
Not sure if this a process misunderstanding or a software misunderstanding.
Let me explain what's got me confused...
I took a recipe from a recent brew and changed the mash profile from a BIAB single infusion, to a single infusion, no sparge, no mash out profile that came as a sample.
I can see where the Total Water Needed field increased by exactly the amount of difference in the grain absorption rates.
What confuses me is that the calculated/estimated post mash gravity and pre-boil gravity don't change.
In my mind, there is wort left in the grain, not water.
If I mashed this BIAB-style, then lifted the bag out and and squeezed until exactly 0.586 fl.oz. of wort was left in the bag per every oz. of grain (BS default for BIAB), my mind tells me that the wort left in the grain in the bag shares the same SG as the wort in the kettle.
Many times, I've lifted the bag, stirred well, measured the gravity, then squeezed the bag for another half gallon, stirred and measured the same gravity.
So If I now mash this same grist, with the increased amount of water described above, in a mash tun with false bottom, full volume, and simply drain.
I'll take a leap of faith here (since I've never done it) and assume that the grain will hang on to 0.96 fl.oz of wort for every oz of grain (BS default for non-BIAB).
My mind tells me that I have diluted this wort by the water addition and the gravity should be lower. Something like this:
(BIAB Volume of Water)*(BIAB Post Mash Gravity) = (nonBIAB Volume of Water)*(nonBIAB Post Mash Gravity)
However, BS doesn't change its estimated power mash gravity or pre-boil volume when switching from BIAB mash profiles to nonBIAB mash profiles.
Am I doing something wrong in BS?
Or is my mind playing tricks on me with regard to the added water = dilution concept?
Thanks for reading all that.
Particularly setting up the mash profile in BeerSmith.
Not sure if this a process misunderstanding or a software misunderstanding.
Let me explain what's got me confused...
I took a recipe from a recent brew and changed the mash profile from a BIAB single infusion, to a single infusion, no sparge, no mash out profile that came as a sample.
I can see where the Total Water Needed field increased by exactly the amount of difference in the grain absorption rates.
What confuses me is that the calculated/estimated post mash gravity and pre-boil gravity don't change.
In my mind, there is wort left in the grain, not water.
If I mashed this BIAB-style, then lifted the bag out and and squeezed until exactly 0.586 fl.oz. of wort was left in the bag per every oz. of grain (BS default for BIAB), my mind tells me that the wort left in the grain in the bag shares the same SG as the wort in the kettle.
Many times, I've lifted the bag, stirred well, measured the gravity, then squeezed the bag for another half gallon, stirred and measured the same gravity.
So If I now mash this same grist, with the increased amount of water described above, in a mash tun with false bottom, full volume, and simply drain.
I'll take a leap of faith here (since I've never done it) and assume that the grain will hang on to 0.96 fl.oz of wort for every oz of grain (BS default for non-BIAB).
My mind tells me that I have diluted this wort by the water addition and the gravity should be lower. Something like this:
(BIAB Volume of Water)*(BIAB Post Mash Gravity) = (nonBIAB Volume of Water)*(nonBIAB Post Mash Gravity)
However, BS doesn't change its estimated power mash gravity or pre-boil volume when switching from BIAB mash profiles to nonBIAB mash profiles.
Am I doing something wrong in BS?
Or is my mind playing tricks on me with regard to the added water = dilution concept?
Thanks for reading all that.