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Old 09-01-2009, 07:33 PM   #1
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Default Batch sparge temp calculation question.

I am using Beersmith, and on my preview sheet for my recipe, it says to strike with ~9.5 qts of 164° water to reach a rest temp of 152° with my 7.5 lbs of grain at a temp of 75°.

I will be using a double batch sparge of 3 gallons each, and Beersmith says to sparge with 168° water for each batch.

Meow my question is this, if I am adding 3 gallons of 168° water to grain that is about ~152° after my first runnings, will that keep me in the 168° range during sparging, or will I need to heat my water a few degrees warmer (175-180°) to keep within the 168° sparge temp?

Is Beersmith incorrect, or is it just not that critical to keep within the realm of 168° during sparging?

Or, even better, is the 3 gallons of 168° water enough to raise the temperature in the mash tun to 168° without a significant loss of heat to the grain?

As usual I may be over-thinking things, but this Sunday will be my first AG brew day, and I would like it to go off without a hitch.

FWIW, this is an Ordinary Bitter recipe with an OG of 1.042.

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Old 09-02-2009, 02:35 AM   #2
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Hi. I follow the instructions from BeerSmith with good results. Others with more experience and a more scientific approach to brewing might be able to answer your specific question, though.

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Old 09-02-2009, 02:56 AM   #3
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Quote:
Originally Posted by Schnitzengiggle View Post
I am using Beersmith, and on my preview sheet for my recipe, it says to strike with ~9.5 qts of 164° water to reach a rest temp of 152° with my 7.5 lbs of grain at a temp of 75°.

I will be using a double batch sparge of 3 gallons each, and Beersmith says to sparge with 168° water for each batch.

Meow my question is this, if I am adding 3 gallons of 168° water to grain that is about ~152° after my first runnings, will that keep me in the 168° range during sparging, or will I need to heat my water a few degrees warmer (175-180°) to keep within the 168° sparge temp?

Is Beersmith incorrect, or is it just not that critical to keep within the realm of 168° during sparging?

Or, even better, is the 3 gallons of 168° water enough to raise the temperature in the mash tun to 168° without a significant loss of heat to the grain?

As usual I may be over-thinking things, but this Sunday will be my first AG brew day, and I would like it to go off without a hitch.

FWIW, this is an Ordinary Bitter recipe with an OG of 1.042.
If you choose Single Infusion instead of Single Infusion, Batch Sparge, then the software will give you a mashout of about 1.5g at about 200F.

If you select a mash profile that includes "batch sparge", then BeerSmith does not include a mashout.

BTW, you probably already know this but you can force 2 equal sparges by just lowering the volume of your mash tun to 4 gallons (in your Equipment profile).
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Last edited by passedpawn; 09-02-2009 at 03:26 AM. Reason: Apparently, it was not obvious that the answer was here. Bolded to help.
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Old 09-02-2009, 03:00 AM   #4
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Either Beersmith is wrong or you are misinterpreting what it is telling you.
Adding 168F sparge water to a 152F mash cannot raise the temp to 168F. You will lose some heat to heating the MLT, and more heat to raising the mash temp, resulting in a sparge temp of much less than 168F. It's so long since I batch sparged that I'm not even going to guess what temp your sparge water should be heated to.

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Old 09-02-2009, 03:13 AM   #5
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It's going to take something like 185F sparge to get 168. BS just defaults to 168 sparge given an assumed mashout.

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Old 09-02-2009, 03:24 AM   #6
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Choose Single Infusion (not the batch sparge options) for your mash. BS will give you a mashout to raise the mash before the sparges.

I thought I put this in a post above, but apparently it was either 1) invisible, or 2) not clear.

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Old 09-02-2009, 03:26 AM   #7
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not trying to jack the thread, but I have the exact same question. I've done 3 AG batches using Beersmith and added 168 water for the sparge and ended up with 40% (crush from LHBS sucked) 55% and 60% efficiency. Would adding the 185 water increase my efficiency? I've been mashing at 152 and 1.25 qt/lb and doing a single sparge usually around 3.3 gallons depending on the recipe.

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Old 09-02-2009, 03:51 AM   #8
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Yeh, that won't work at 168F.

I do my batch sparging with 182-184F water to hit 166-168F. Depends on your vessels and such, but as ajf noted, it simply isn't possible. I no longer use BS for my mashing and sparge calcs. It is confusing in my opinion!

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Old 09-02-2009, 04:29 AM   #9
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I think that passedpawn is right on the money if you want to follow BS for your sparging. I have done 5 AG brews to date and until today, I couldn't hit 168F on my sparge. I do a double batch sparge and it is tough to hit the 168 due to variables such as a slow mash out which will lower your grain temp etc.

Today, I finally decided to add 1 gallon of boiling water prior to my sparging. This took my grain bed to about 165. Then I added the first batch sparge amount (minus 1 gallon) at about 175. I hit 168 right on.

I read one of Bobby M's posts once and he was talking about hitting 168 is not crucial to efficiency. I think he said that as long as you hit a batch sparge temp above 162 or so you are fine.

Have fun brewing up your first AG!

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Old 09-02-2009, 04:44 AM   #10
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is this an error in the beersmith software then???

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