I'm getting ready for my first BIAB and have been fiddling around with the calculator spreadsheet and Brewsmith. What I can't get my head around is where all the water goes... What accounts for the 3 or 4 litres difference between the post boil voulme and the volume into the FV? I can understand some water being retained by the hops, but I'm obviously missing something here.
Bob
Post #2 made 14 years ago
Some of it is associated with the trub that you leave behind when removing it from the pot. This can usually be set in the software.
The other is due to the fact the end of boil volume is usually measured at 100C and the FV is measured at 20C so for example my last brew 26.0 litres at 100C become 24.9 litres at 20C due to the wort contracting on cooling.
The other is due to the fact the end of boil volume is usually measured at 100C and the FV is measured at 20C so for example my last brew 26.0 litres at 100C become 24.9 litres at 20C due to the wort contracting on cooling.
Post #3 made 14 years ago
Ah, that starts to make more sense then. I'll just have to stop fannying about with the details and just get on with it!
Bob
Bob
Post #4 made 14 years ago
Welcome to the forum Bob,
It's not hard to lose a lot in the kettle. For example, I have a pot that's 45 cms wide. If I didn't do any sort of 'trub management' (such as use a hop sock or do a whirlpool) I could easily end up with 4 cm of 'muck' at the bottom of my kettle. In my case, this would mean about 6.5 litres!
Cheers,
PP
It's not hard to lose a lot in the kettle. For example, I have a pot that's 45 cms wide. If I didn't do any sort of 'trub management' (such as use a hop sock or do a whirlpool) I could easily end up with 4 cm of 'muck' at the bottom of my kettle. In my case, this would mean about 6.5 litres!
Cheers,
PP
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Post #5 made 14 years ago
Good Day, If you are concerned about the loss, A sheet of polyester cloth, or 8-10 layers of cheese cloth, can recover about 6L of the 6.5l you left in the kettle. Just my .02au.
Honest Officer, I swear to Drunk, I am Not God.
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Post #6 made 14 years ago
Seems I had underestimated how much can be left in the boiler. Does the use of a hop sock make much difference to this?
Bob
Bob
Post #7 made 14 years ago
Hi Bob. The use of a hop sock essentially keeps the hop debris out of the wort while allowing the oils in. This means you wont have hop matter in the base of your kettle at the end of the boil, allowing you to siphon off more clear wort. Albeit marginal.
If you don't use a hop sock, giving the wort a good whirlpool prior to siphoning will centralise the trub in the kettle and allow you better access to the clear wort.
If you don't use a hop sock, giving the wort a good whirlpool prior to siphoning will centralise the trub in the kettle and allow you better access to the clear wort.
Last edited by hashie on 27 Dec 2011, 04:56, edited 3 times in total.
"It's beer Jim, but not as we know it."
Confused over volumes
Post #8 made 13 years ago
Well having done my first BIAB I did have trouble with the volumes :( Started with 43.6 litres for a 23 litre batch (youngs special clone put into brewsmith). Ended up with 35 litres at the end of the boil! OG was only 1035 but hopefully it'll still taste good 
Next time I'll start with about 33 litres.
Bob
Next time I'll start with about 33 litres. Bob
Post #9 made 13 years ago
This could work out well for you tractorboy!Are you bottling?If so just make sure you have enough bottles on hand when the big day comes! There is nothing wrong with a low alcohol session beer so long as it has some body to it and it looks like yours should. I have move in this direction myself lately because I like my beer so much that I tend to wear a bit of a path to the fridge! 
The lower alcohol helps to keep me coherent! 
The lower alcohol helps to keep me coherent! AWOL
Post #10 made 13 years ago
I had a similar issue with my first BIAB, was due to a pathetically under powered burner and thus low evaporation rate.tractorboy wrote:Well having done my first BIAB I did have trouble with the volumes :( Started with 43.6 litres for a 23 litre batch (youngs special clone put into brewsmith). Ended up with 35 litres at the end of the boil! OG was only 1035 but hopefully it'll still taste good
Bob
Since rectified
Last edited by stux on 13 Jan 2012, 08:30, edited 3 times in total.
Fermenting: -
Cubed: -
Stirplate: -
On Tap: NS Summer Ale III (WY1272), Landlord III (WY1469), Fighter's 70/- II (WY1272), Roast Porter (WY1028), Cider, Soda
Next: Munich Helles III
5/7/12
Cubed: -
Stirplate: -
On Tap: NS Summer Ale III (WY1272), Landlord III (WY1469), Fighter's 70/- II (WY1272), Roast Porter (WY1028), Cider, Soda
Next: Munich Helles III
5/7/12
Post #12 made 13 years ago
for the record, if the 35L had been boiled down to 24.5L it would've been 1.050Lylo wrote:35 liters at OG 1035 you must have had a lot of grain in there!
Last edited by stux on 13 Jan 2012, 12:41, edited 3 times in total.
Fermenting: -
Cubed: -
Stirplate: -
On Tap: NS Summer Ale III (WY1272), Landlord III (WY1469), Fighter's 70/- II (WY1272), Roast Porter (WY1028), Cider, Soda
Next: Munich Helles III
5/7/12
Cubed: -
Stirplate: -
On Tap: NS Summer Ale III (WY1272), Landlord III (WY1469), Fighter's 70/- II (WY1272), Roast Porter (WY1028), Cider, Soda
Next: Munich Helles III
5/7/12
Post #13 made 13 years ago
Fermentation going OK; down to 1010 after 6 days.
Here's the recipe:
BeerSmith 2 Recipe Printout - http://www.beersmith.com
Recipe: Young's Special
Brewer: Bob
Asst Brewer:
Style: Special/Best/Premium Bitter
TYPE: All Grain
Taste: (30.0)
Recipe Specifications
--------------------------
Boil Size: 40.71 l
Post Boil Volume: 30.49 l
Batch Size (fermenter): 23.00 l
Bottling Volume: 20.20 l
Estimated OG: 1.045 SG
Estimated Color: 8.7 EBC
Estimated IBU: 28.1 IBUs
Brewhouse Efficiency: 70.00 %
Est Mash Efficiency: 89.2 %
Boil Time: 90 Minutes
Ingredients:
------------
Amt Name Type # %/IBU
4.31 kg Pale Malt, Maris Otter (5.9 EBC) Grain 1 91.1 %
0.42 kg Caramel/Crystal Malt - 10L (19.7 EBC) Grain 2 8.9 %
27.00 g Fuggles [4.50 %] - Boil 90.0 min Hop 3 11.9 IBUs
27.00 g Goldings, East Kent [5.00 %] - Boil 90.0 Hop 4 13.2 IBUs
3.00 g Irish Moss (Boil 10.0 mins) Fining 5 -
18.00 g Goldings, East Kent [5.00 %] - Boil 10.0 Hop 6 3.0 IBUs
Mash Schedule: BIAB, Medium Body
Total Grain Weight: 4.73 kg
----------------------------
Name Description Step Temperat Step Time
Saccharification Add 43.60 l of water at 69.8 C 66.7 C 90 min
Sparge: Remove grains, and prepare to boil wort
Notes:
------
Created with BeerSmith 2 - http://www.beersmith.com
-------------------------------------------------------------------------------------
Here's the recipe:
BeerSmith 2 Recipe Printout - http://www.beersmith.com
Recipe: Young's Special
Brewer: Bob
Asst Brewer:
Style: Special/Best/Premium Bitter
TYPE: All Grain
Taste: (30.0)
Recipe Specifications
--------------------------
Boil Size: 40.71 l
Post Boil Volume: 30.49 l
Batch Size (fermenter): 23.00 l
Bottling Volume: 20.20 l
Estimated OG: 1.045 SG
Estimated Color: 8.7 EBC
Estimated IBU: 28.1 IBUs
Brewhouse Efficiency: 70.00 %
Est Mash Efficiency: 89.2 %
Boil Time: 90 Minutes
Ingredients:
------------
Amt Name Type # %/IBU
4.31 kg Pale Malt, Maris Otter (5.9 EBC) Grain 1 91.1 %
0.42 kg Caramel/Crystal Malt - 10L (19.7 EBC) Grain 2 8.9 %
27.00 g Fuggles [4.50 %] - Boil 90.0 min Hop 3 11.9 IBUs
27.00 g Goldings, East Kent [5.00 %] - Boil 90.0 Hop 4 13.2 IBUs
3.00 g Irish Moss (Boil 10.0 mins) Fining 5 -
18.00 g Goldings, East Kent [5.00 %] - Boil 10.0 Hop 6 3.0 IBUs
Mash Schedule: BIAB, Medium Body
Total Grain Weight: 4.73 kg
----------------------------
Name Description Step Temperat Step Time
Saccharification Add 43.60 l of water at 69.8 C 66.7 C 90 min
Sparge: Remove grains, and prepare to boil wort
Notes:
------
Created with BeerSmith 2 - http://www.beersmith.com
-------------------------------------------------------------------------------------
Post #14 made 13 years ago
Well, cracked open a bottle yesterday and it tastes fantastic!
BIAB rocks
Bob
BIAB rocks
Bob
Post #15 made 13 years ago
Nice going Bob 
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