I've done three brews so far, one with a partial mash, one with only extract and one BIAB. I'm restricted to working with a 10L kettle (a little more than 2.5 gallons). For obvious reasons, this yields quite small batches. I've been reading quite a bit different BIAB techniques and have a question about something similar. More specifically, I'm curious about the difference between two ways of brewing.
In the first scenario, let's say we have 12.5L of wort to boil for an hour. The boil-off is 2.5L so that at the end of the boil we're left with 10L.
In the other scenario, we start with 10L of wort in our main kettle. But this was obtained using BIAB, and we re-use the bag in a second (smaller) kettle. So when the boil starts we are boiling 10L in one kettle and around 4-5L in a second kettle. As wort boils off in the main kettle, we add wort from the second kettle. Let's say we do this every 15 minutes.
The two scenarios obviously differ, but at the end of the boil they should have the same amount of wort left: 10L. A simple figure may illustrate this.
My questions are:
- Is the second technique bad?
- Would the hop amounts be different in the two techniques (provided nothing is added to the second kettle)?