The importance of heat stress
Posted: Fri Jul 01, 2016 11:24 am
I just wanted to share some anecdotal experience and photos concerning heat stress in the boil.
For a little while several months back when we were still figuring out the LODO process, I was experimenting with longer boils with a higher boiloff rate. I was getting lots of color pickup, and the post-boil wort lost most of the fresh malt flavor that was in the mash. The finished beer also lacked the nice flavor. We then went to the short, gentle boil and saw tremendous improvement - dramatically improved taste, and far less color pickup.
Here's a picture of some pre-boil wort from a few months back:
And here's the same wort post-boil, pre-chilling (so no cold break has formed yet). This was just under a 2 hour boil with nearly 30% total evaporation:
For a little while several months back when we were still figuring out the LODO process, I was experimenting with longer boils with a higher boiloff rate. I was getting lots of color pickup, and the post-boil wort lost most of the fresh malt flavor that was in the mash. The finished beer also lacked the nice flavor. We then went to the short, gentle boil and saw tremendous improvement - dramatically improved taste, and far less color pickup.
Here's a picture of some pre-boil wort from a few months back:
- preboil1_small.jpeg (327.47 KiB) Viewed 11395 times
And here's the same wort post-boil, pre-chilling (so no cold break has formed yet). This was just under a 2 hour boil with nearly 30% total evaporation:
- postboil1_small.jpeg (346.22 KiB) Viewed 11395 times