earlyd
Active Member
I am looking for some help on efficiency. I have done about a half dozen all grain batches and calculated the efficiency on all of them. With my efficiency at 76% to 81% I felt pretty confident I was doing it correctly. I brewed the other day and when I was going through my notes I calculated my efficiency at 90%. Now I would be very happy if it where correct but I have a feeling that I must have screwed something up. I did use a 5.2 buffer for the first time and was told that it might help with efficiency. I mashed with 1.5 qt of water per pound of grain for 1 hour @ 158 F. My temp did drop to 153 # by the end. I then sparged with 175 F water for 45 minutes. And collected 7 gallons of work. I stirred the wort and pulled a sample. I chilled that sample to 60 F and it read 1.050.
Below are my grain bill and my math. If anyone can let me know if this is correct and if not what I did wrong I would appreciate it.
GRAIN BILL
Malt 1: 9# Maris Otter Gravity Points 38
Malt 2: .75 # Flaked Barley Gravity points 32
Malt 3: .5# Dark Crystal 135 L Gravity Points 33
Malt 4: .13 # Chocolate malt Gravity points 28
MATH
G= Amount of Grain
P= Gravity points
W= Amount of pre boil wort (7 Gallons)
G*P/W I used this formula for all 4 grains.
WORK:
Malt 1: 9*38/7 =49
Malt 2: .75*32/7=3
Malt 3: .5*33/7=2
Malt 4: .13*28/7=. 5
Total = 55
I then add the total points together, round up and then divide the gravity points in my pre boil by that number. In this case my per boil gravity was 1.050.
50/55= .90 or 90 % Efficiency
Sorry it so long I just wanted to give as much info as possible.
Thanks,
~d
Below are my grain bill and my math. If anyone can let me know if this is correct and if not what I did wrong I would appreciate it.
GRAIN BILL
Malt 1: 9# Maris Otter Gravity Points 38
Malt 2: .75 # Flaked Barley Gravity points 32
Malt 3: .5# Dark Crystal 135 L Gravity Points 33
Malt 4: .13 # Chocolate malt Gravity points 28
MATH
G= Amount of Grain
P= Gravity points
W= Amount of pre boil wort (7 Gallons)
G*P/W I used this formula for all 4 grains.
WORK:
Malt 1: 9*38/7 =49
Malt 2: .75*32/7=3
Malt 3: .5*33/7=2
Malt 4: .13*28/7=. 5
Total = 55
I then add the total points together, round up and then divide the gravity points in my pre boil by that number. In this case my per boil gravity was 1.050.
50/55= .90 or 90 % Efficiency
Sorry it so long I just wanted to give as much info as possible.
Thanks,
~d