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Old 02-19-2009, 03:56 AM   #1
dunleav1
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Default Beersmith - Issue with Sparge volume

I'm doing a partigyle brew so I'm creating a recipe with the common base malts and I'm having an issue with the sparge volume. I'm doing a single step infusion mash with batch sparge.

I have recipe with 19# of grain I get the correct sparge volume when I hit preview brewsheet:
OG 1.043
19# grain
Saccharification 1.25 quarts per gallon
Mash out 2 quarts per gallon.
Sparge with 7 gallons.

This is perfect sparge volume for my partigyle but my OG is too low. I need to increase the grain bill. If I keep the same ratio's for the mash steps, beersmith comes up with a different sparge volume for the increased grain bill. WTF - I kept the same ratios. I would expect the volume of water in the mash steps to increase proportionately
OG 1.057
25# grain
Saccharification 1.25 quarts per gallon
Mash out 2 quarts per gallon.
Sparge with 4.91 gallons.

I am missing something ?

Thanks for the help.
JD



Reason: typo
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Old 02-19-2009, 07:38 AM   #2
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I like Beersmith, and I think it's a great program. But I do not like it's sparge calculations. I believe that it's grain absorption values are off. I'm a batch sparger, and I constantly need to modify the sparge value.

In regards to your situation, with proportionality, I'd have to say you need to do the math to double check. Maybe there is some brewing science in it somewhere, where it does not need to go up and down proportionally.


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Old 02-20-2009, 01:01 AM   #3
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Yes, I'm a fan of Beersmith as well but the sparging stuff drives me nuts.

And yes, I am batch sparging.

How do modify the sparge value without modifying the mash in and mash out ratios?
I like my percentages with the 19# grain mill but not with the 25# grain bill.

Reason: typo
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Old 02-20-2009, 06:11 AM   #4
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Originally Posted by dunleav1 View Post
How do modify the sparge value without modifying the mash in and mash out ratios?
I like my percentages with the 19# grain mill but not with the 25# grain bill.
Personally I found that if I add .75 gallon of sparge water to what Beersmith says, I end up great. I've been meaning to do a spreadsheet from the formulas from Ray Daniels gives for measuring water.

I'll look it up tomorrow and let you know the formulas.
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Old 02-20-2009, 04:29 PM   #5
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Quote:
Originally Posted by dunleav1 View Post
Yes, I'm a fan of Beersmith as well but the sparging stuff drives me nuts.

And yes, I am batch sparging.

How do modify the sparge value without modifying the mash in and mash out ratios?
I like my percentages with the 19# grain mill but not with the 25# grain bill.
You can't. If you hold your liquor to grist ratio constant (e.g., 1.25 quarts water per lb of grain), then the higher the OG you are targetting, the lower the ratio of your sparge water. The only way you can keep it the same is to collect more runnings and boil longer to evaporate it off to compensate.

This is exactly how the software should behave, unless I do not understand your problem correctly.
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Old 02-20-2009, 04:35 PM   #6
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Originally Posted by Warped04 View Post
I like Beersmith, and I think it's a great program. But I do not like it's sparge calculations. I believe that it's grain absorption values are off. I'm a batch sparger, and I constantly need to modify the sparge value.
The grain absorption values in Beersmith are fine. It sounds to me like you have a loss in your system somewhere that is not accounted for in your Beersmith equipment profile (e.g. lauter tun dead space).
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Old 02-21-2009, 01:40 AM   #7
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Originally Posted by FlyGuy View Post
You can't. If you hold your liquor to grist ratio constant (e.g., 1.25 quarts water per lb of grain), then the higher the OG you are targetting, the lower the ratio of your sparge water. The only way you can keep it the same is to collect more runnings and boil longer to evaporate it off to compensate.

This is exactly how the software should behave, unless I do not understand your problem correctly.
...by increasing the grain bill I should be increasing the gravity if I keep the ratio's the same....
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Old 02-21-2009, 01:42 AM   #8
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Originally Posted by FlyGuy View Post
The grain absorption values in Beersmith are fine. It sounds to me like you have a loss in your system somewhere that is not accounted for in your Beersmith equipment profile (e.g. lauter tun dead space).
I have the mash/lauter tun deadspace set to .5 gallon.
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Old 02-21-2009, 07:25 AM   #9
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Originally Posted by FlyGuy View Post
The grain absorption values in Beersmith are fine. It sounds to me like you have a loss in your system somewhere that is not accounted for in your Beersmith equipment profile (e.g. lauter tun dead space).
I'll have to measure it again, but I'm pretty sure it's around 1 quart. Maybe I'm missing something here.
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Old 02-21-2009, 07:57 AM   #10
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Originally Posted by dunleav1 View Post
...by increasing the grain bill I should be increasing the gravity if I keep the ratio's the same....
No, you are forgetting that you have to add grain to increase the gravity. If your mash water is set to be proportional to the grain (e.g., 1.25 qts/lb) then you are going to have a greater volume of first runnings from the mash, and will require less sparge water to reach your target pre-boil volume.


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