I have been tweaking the mash settings and based on a Denny Conn podcast I am aiming to get equal volumes out of the mash tun. I have a 10 gallon cooler mash tun and am making an all grain stout recipe with a grain weight basis of 11.13Lbs. I have my equipment profile dialed in and the mash tun has a deadspace of 0.75 gallons.
The mash setting I am using for this is:
- Single infusion with two steps, full body, batch sparge
- I have the "Drain Mash tun before sparging" ticked, as well as "Use equal batch sizes"
BeerSmith is saying to mash in with 16.91quarts, drain the mash tun and then sparge with 5.35 gallons. The mash absorption is calculated at 1.34 gallons.
So the initial runnings will be (16.91/4) - 0.75 deadspace - 1.34 absorption = 2.1 gallons. Then I sparge with 5.35 gallos and end up with 5.35+ 2.1 = 7.45 gallons which is correct. I need 7.5 gallons in the kettle for my equipment profile.
The question I have is that I would have thought that for equal batch sizes, I would be looking at 7.5/2 or 3.75 plus the absorption and deadspace losses. So 3.75+0.75+1.34 = 5.8 gallons/23.4 quarts. That would result in 3.75 gallons when I drain the mash tun and then I would add another 3.75 gallons to end up with a total of 7.5 gallons.
What am I missing? Is it that adding 5.8 gallons into 11lbs of grain would make too thin a mash consistency and it is more important to achieve the recommended 1.25 quarts/Lb thickness?
Thanks,
Paul
The mash setting I am using for this is:
- Single infusion with two steps, full body, batch sparge
- I have the "Drain Mash tun before sparging" ticked, as well as "Use equal batch sizes"
BeerSmith is saying to mash in with 16.91quarts, drain the mash tun and then sparge with 5.35 gallons. The mash absorption is calculated at 1.34 gallons.
So the initial runnings will be (16.91/4) - 0.75 deadspace - 1.34 absorption = 2.1 gallons. Then I sparge with 5.35 gallos and end up with 5.35+ 2.1 = 7.45 gallons which is correct. I need 7.5 gallons in the kettle for my equipment profile.
The question I have is that I would have thought that for equal batch sizes, I would be looking at 7.5/2 or 3.75 plus the absorption and deadspace losses. So 3.75+0.75+1.34 = 5.8 gallons/23.4 quarts. That would result in 3.75 gallons when I drain the mash tun and then I would add another 3.75 gallons to end up with a total of 7.5 gallons.
What am I missing? Is it that adding 5.8 gallons into 11lbs of grain would make too thin a mash consistency and it is more important to achieve the recommended 1.25 quarts/Lb thickness?
Thanks,
Paul