tateg said:
Hey sly
How did you work out the hops required to give you 28ibu ?
So this has no kettle hops at all??
Also what was the 10 minute wait after flame out for ?
Cheers tate
I ended up going for 22.5 IBU's.
There are no kettle hops at all so the hops were all added in the whirlpool (or hop-stand). Where shortly after flameout they are added and whirled and left to sit around 95-90degrees. As Isomerization continues until about 80degrees you need to factor in some bitterness being created.
I got a recommendation from a pro that 12% utilisation for whirlpool hops is a decent estimation. Assuming the SG of 1.044 that is similar to a 12-15minute addition. So I used that + beer smith to come up with my IBU's for the batch.
It came out (for my system), like this:
Recipe: Mountain Goat Steam Ale TYPE: All Grain
Style: American Pale Ale
---RECIPE SPECIFICATIONS-----------------------------------------------
SRM: 5.1 EBC SRM RANGE: 9.8-27.6 EBC
IBU: 0.0 IBUs Tinseth IBU RANGE: 30.0-45.0 IBUs
OG: 1.044 SG OG RANGE: 1.045-1.060 SG
FG: 1.010 SG FG RANGE: 1.010-1.015 SG
BU:GU: 0.000 Calories: 427.1 kcal/l Est ABV: 4.5 %
EE%: 80.00 % Batch: 65.00 l Boil: 78.80 l BT: 60 Mins
---WATER CHEMISTRY ADDITIONS----------------
Amt Name Type # %/IBU
34.34 ml Gypsum (Calcium Sulfate) (Mash 60.0 mins Water Agent 1 -
34.00 ml Calcium Chloride (Mash 60.0 mins) Water Agent 2 -
Total Grain Weight: 11.50 kg Total Hops: 258.00 g oz.
---MASH/STEEP PROCESS------MASH PH:5.40 ------
>>>>>>>>>>-ADD WATER CHEMICALS BEFORE GRAINS!!<<<<<<<
Amt Name Type # %/IBU
10.06 kg Pilsner, Malt Craft Export (Joe White) ( Grain 3 87.5 %
1.44 kg Wheat Malt, Malt Craft (Joe White) (3.5 Grain 4 12.5 %
Name Description Step Temperat Step Time
Protein Rest Add 57.01 l of water at 57.5 C 55.0 C 15 min
Saccharification Heat to 67.0 C over 15 min 67.0 C 45 min
Protein Rest 2 Heat to 72.0 C over 10 min 72.0 C 10 min
Mash Out Heat to 78.0 C over 4 min 78.0 C 10 min
---BOIL PROCESS-----------------------------
Est Pre_Boil Gravity: 1.039 SG Est OG: 1.044 SG
Amt Name Type # %/IBU
1.00 Items Whirlfloc Tablet (Boil 15.0 mins) Fining 5 -
35.00 g Citra [11.90 %] - Boil 0.0 min Hop 6 0.0 IBUs
35.00 g Galaxy [13.90 %] - Boil 0.0 min Hop 7 0.0 IBUs
35.00 g Motueka [6.90 %] - Boil 0.0 min Hop 8 0.0 IBUs
Dry hops:
Code:
51.00 g Citra [11.90 %] - Dry 3.0 days Hop 6 0.0 IBUs
51.00 g Galaxy [13.90 %] - Dry 3.0 days Hop 7 0.0 IBUs
51.00 g Motueka [6.90 %] - Dry 3.0 days Hop 8 0.0 IBUs