fletcher
bibo ergo sum
- Joined
- 19/8/12
- Messages
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hey guys,
hopefully this isn't too long winded, but i just wanted to make sure these calculations seem correct. i'm trying to get an idea of my efficiency and calibrating my set up so i can get more uniform brewing happening and make sure i'm on target with all my figures. if anyone is extremely bored and wouldn't mind running through them, i'd be thankful. not really concerned if no one can be bothered though so no dramas either way.
i used this website which seems pretty straight forward for calcs - http://www.brewersfriend.com/brewhouse-efficiency/
recipe was a pale ale and i BIAB. i use brewmate so my initial figures were on there for a 70% efficiency.
10L batch
2.2 kgs vienna
0.2 kgs carapils
2.4 kgs
14.1L strike water
5.89 water:grain ratio
65C mash temp
pre-boil temp - 65C
pre-boil volume - 11.5L, i then squeezed this and got to 12.5L
pre-boil gravity - 1.053 (spot on)
my loss to grain is 14.1 - 12.5 = 1.6L
my conversion efficiency - 89.8%
_______________________________________
post-boil volume - 8.5L
post-boil gravity - 1.068
my loss to evaporation is 4L, and a whopping 30% i believe? (100 - (8.5 x 100 / 12.5) = 30% (32 to be exact)
post-boil efficiency - 78.35%
_______________________________________
transfer into chill cube - 7L
added water - 10L
according to brewmate, diluted gravity = 1.048
loss to trub is 8.5 - 7 = 1.5L
_______________________________________
so brewhouse efficiency is all the losses combined (i think?) the calc worked this out as: 10L @ 1.048 which = 65%
_______________________________________
questions:
1. my loss to evaporation seems WAY too much, and i think it's because it's such a small volume at too high a heat?
2. if i lowered this heat, would this loss lessen? (i'm trying to aim to get straight to 10L into cube or as close to possible of course)
3. which of the efficiency figures then do i put into brewmate for my next brew?
4. i read thirstyboy suggest that the dilution water should be added to the pot to lessen loss to trub? so i should have added the 3L boiling water post boil into pot and not into cube?
thanks for any feedback.
fletcher.
hopefully this isn't too long winded, but i just wanted to make sure these calculations seem correct. i'm trying to get an idea of my efficiency and calibrating my set up so i can get more uniform brewing happening and make sure i'm on target with all my figures. if anyone is extremely bored and wouldn't mind running through them, i'd be thankful. not really concerned if no one can be bothered though so no dramas either way.
i used this website which seems pretty straight forward for calcs - http://www.brewersfriend.com/brewhouse-efficiency/
recipe was a pale ale and i BIAB. i use brewmate so my initial figures were on there for a 70% efficiency.
10L batch
2.2 kgs vienna
0.2 kgs carapils
2.4 kgs
14.1L strike water
5.89 water:grain ratio
65C mash temp
pre-boil temp - 65C
pre-boil volume - 11.5L, i then squeezed this and got to 12.5L
pre-boil gravity - 1.053 (spot on)
my loss to grain is 14.1 - 12.5 = 1.6L
my conversion efficiency - 89.8%
_______________________________________
post-boil volume - 8.5L
post-boil gravity - 1.068
my loss to evaporation is 4L, and a whopping 30% i believe? (100 - (8.5 x 100 / 12.5) = 30% (32 to be exact)
post-boil efficiency - 78.35%
_______________________________________
transfer into chill cube - 7L
added water - 10L
according to brewmate, diluted gravity = 1.048
loss to trub is 8.5 - 7 = 1.5L
_______________________________________
so brewhouse efficiency is all the losses combined (i think?) the calc worked this out as: 10L @ 1.048 which = 65%
_______________________________________
questions:
1. my loss to evaporation seems WAY too much, and i think it's because it's such a small volume at too high a heat?
2. if i lowered this heat, would this loss lessen? (i'm trying to aim to get straight to 10L into cube or as close to possible of course)
3. which of the efficiency figures then do i put into brewmate for my next brew?
4. i read thirstyboy suggest that the dilution water should be added to the pot to lessen loss to trub? so i should have added the 3L boiling water post boil into pot and not into cube?
thanks for any feedback.
fletcher.