bcp
poפ ɹǝǝq
- Joined
- 6/9/09
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In planning for beers with a higher grain bill, it's easy to work out when you have more water than pot. I could also work out the amount of space the grain takes up dry - but it absorbs water, so that changes it.
So what i'm not sure about is how many kg of grain added to the water starts to mean i'm out of space.
1. There must be a formula for calculating the volume of the grain itself? (xkg of grain + xlitres of water = 40 litres space). or (xk grain = xlitres of grain).
2. Or for the more immediate and simple answer, i have a birko 40litre urn & BIAB. What's the biggest grain bill i should attempt for a 23 litre batch normal BIAB style? 8kg? 10kg?
3. Presumably after that i could potentially hold some water in reserve to 'sparge' the bag, thus increasing the effective volume = or brew at a higher gravity and add water later. = or put some of the grain/water in the kitchen 10 litre pot and add it to the boil later?
I've got a larger grain bill with my next brew, and was rather surprised with the volume of the first smaller one!
So what i'm not sure about is how many kg of grain added to the water starts to mean i'm out of space.
1. There must be a formula for calculating the volume of the grain itself? (xkg of grain + xlitres of water = 40 litres space). or (xk grain = xlitres of grain).
2. Or for the more immediate and simple answer, i have a birko 40litre urn & BIAB. What's the biggest grain bill i should attempt for a 23 litre batch normal BIAB style? 8kg? 10kg?
3. Presumably after that i could potentially hold some water in reserve to 'sparge' the bag, thus increasing the effective volume = or brew at a higher gravity and add water later. = or put some of the grain/water in the kitchen 10 litre pot and add it to the boil later?
I've got a larger grain bill with my next brew, and was rather surprised with the volume of the first smaller one!