Mash & Sparge Calculation

Question

Mash & Sparge Calculation

Weft

2014年12月18日 16:24

I'm planning on brewing a double batch of "OktoberFAST" this weekend. I've used a few online brewing calculators and they seem to be giving me the wrong answer.

I've always read that if more then 50% of your grain is Pilsner malt you should boil for 90 minutes. Normally every hour of boiling you lose a gallon of water. So if you boil your wort for 90 minutes you'll lose 1.5 gallons of water.

So if I'm planning on making a 12 gallon batch. My pre-boil volume should be 13.5 gallons. The online calculator I always use Brew365 keeps one telling me I need 15 Gallons.

Recipe:

11 # Pilsner

6 # Dark Munich

6 # Vienna

1 # Caramunich

I'm thinking about mashing @ 157.

I know the MAX amount of grain a 10 gallon cooler can hold is 24 pounds.

Could someone help me calculate my Mash/Sparge water for a Single Infusion Batch Sparge?

Topic calculations recipe-scaling sparge homebrew

Category Mac

Denny Conn · Accepted Answer · 2014年12月18日 16:24

Forget the calculators...it's easier to do it empirically. And a couple of misconceptions...you don't necessarily need to boil pils malt for 90 min. I never do more than 70 (10 min, for hot break, then 60 after that) and have no problems. Also, figuring boil off in % is not accurate. You don't boil off twice as much for a 10 gal. batch as a 5 gal. batch. So, start with figuring out what you boil volume needs to be. For me, a 12 gal. batch would need 13.5-14 gal. pre boil. Mash at 1.65 qt./lb., rounding up to the nearest qt. When you run off your mash, measure how much wort you have in your kettle. Subtract that from your pre boil volume. The answer you get will be how much sparge water to use.

Wyrmwood · Accepted Answer · 2014年12月18日 15:56

I like to double check the calculators, but often if something looks off, it's because I didn't input it right. I usually use an online calculator and software (Brewtarget), but I sometimes use a spread sheet with formulas derived from http://byo.com/brown-ale/item/410-calculating-water-usage-advanced-brewing and http://www.howtobrew.com/section3/chapter16-3.html

muck41 · Accepted Answer · 2014年11月12日 01:13

Quickly put this into brew smith see if I didn't screw something up. Disclaimer. I'm not a batch sparge brewer.

Mash in with 33.20 qt water at 168.2 degrees F 45 minutes.

3 step batch sparge. 1 drain. 2 add 15.9 qt at 168. 3 add another 15.9 qt water at 168.

Mash & Sparge Calculation

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