tal82k
New Member
Hey all, I am in a brewing science class. We had an assignment to make a recipe for a tripel using the following parameters:
10 gallon batch
IBU 39
OG 1.081
pilsner 2-row malt
adjunct: 17% fermentable sugar
hops: tetnang, saaz, or golding
yeast: WLP530
Pitch the yeast at 64 degrees F, allow it to get to 68 for the first 5-6 days
Secondary fermentation at 46 degrees for 4 weeks
First, I tried calculating the hops in ounces. I decided randomly to use Saaz hops with a 3.5% AA rating.
I came up with .84 oz with a 60 minute boil:
((.35 decimal AA x ?oz x 7490)/10 gallons)*.176 AAU = 39
Next, I tried to calculate how much grain. I thought I would use 79 gravity points and get the rest by the adjunct. I did (lb/g)(36 extract potential)(.7 extract efficiency)(10 gallons)= 79 and got 3.13 lb/g. This would come to 31.3 lbs total malt.
I don't know how to deal with the 17% fermentable part for the sugar. Does this mean that I should use the Brix scale and convert it to Specific Gravity? If so, how? Prior to thinking about that part, I did this calculation:
(1.081 target - 1.079 current)/.005 x 10/5 x 14.2= 11.36 oz
This is based on table sugar. 14.2 oz raises 5 gallons .005 gravity points.
So what have I done wrong? What have I not though of? Anything is helpful.
10 gallon batch
IBU 39
OG 1.081
pilsner 2-row malt
adjunct: 17% fermentable sugar
hops: tetnang, saaz, or golding
yeast: WLP530
Pitch the yeast at 64 degrees F, allow it to get to 68 for the first 5-6 days
Secondary fermentation at 46 degrees for 4 weeks
First, I tried calculating the hops in ounces. I decided randomly to use Saaz hops with a 3.5% AA rating.
I came up with .84 oz with a 60 minute boil:
((.35 decimal AA x ?oz x 7490)/10 gallons)*.176 AAU = 39
Next, I tried to calculate how much grain. I thought I would use 79 gravity points and get the rest by the adjunct. I did (lb/g)(36 extract potential)(.7 extract efficiency)(10 gallons)= 79 and got 3.13 lb/g. This would come to 31.3 lbs total malt.
I don't know how to deal with the 17% fermentable part for the sugar. Does this mean that I should use the Brix scale and convert it to Specific Gravity? If so, how? Prior to thinking about that part, I did this calculation:
(1.081 target - 1.079 current)/.005 x 10/5 x 14.2= 11.36 oz
This is based on table sugar. 14.2 oz raises 5 gallons .005 gravity points.
So what have I done wrong? What have I not though of? Anything is helpful.