Grain Absorption

General discussion on BeerTools Pro Software.

Grain Absorption

Postby homerjay » Mon Sep 29, 2008 2:45 pm

What is the grain absorbtion set at and is it adjustable?
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Postby dasein668 » Mon Sep 29, 2008 2:57 pm

It is a user-definable constant which can be adjusted by opening the preferences panel and going to the "constants" tab. It is listed as "Malt Water Absorbtion."
Nathan

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Postby homerjay » Tue Sep 30, 2008 12:02 am

thanks
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Postby Baron Ken » Wed Oct 29, 2008 12:06 pm

Have only done 2 AG batches now, but I seem to have different grain absorption constants for each recipe.
It seems BTP does not keep the grain absorption value with the recipe (it's an overall constant).

1st:
8.25 lbs grain x 1.25 qts/lb = 2.6 gal strike water, got 1.5 gal out (0.13 gal/lb absorption rate). This was a LHBS grain mill crush.

2nd:
12.3 lbs grain x 1.22 qts/lb = 3.75 gal strike water, got 1.75 gal out (0.16 gal/lb absorption rate). This was using my new BarleyCrusher at factory setting.

Does the crush affect grain absorption? And if so, shouldn't BTP keep the grain absorption constant as a recipe value and not a general value?
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