The freshness of your malt, the way its milled (not to fine and not too coarse see Goldilocks). Malt - this is really the most likely answer.
Put the BM in Manual mode, put around 10L of water in it and set it to say 65oC and leave it running for half an hour or so with the pumps on and check the temperature (given you have a reliable thermometer). Temperature - the sensor can fail and mashing at radically different temperatures can lead to some strange results. Low efficiency in a Braumeister can really only be down to two factors
If you guys have any tips on how to fix this, it would be great.Īpart from the very strange Grain Absorption figures (fl/oz FFS), 0.96L of water absorbed by 1kg of grain is pretty standard (can vary a bit depends on how long it sits to drain, gets pressed/squeezed.) I use the BacBrewing Increase disk so maybe the pump isn't powerful enough to flow wort through the grain to the top? On my next batch I'll check what the temp of the wort is on top of the malt pipe. Is the high grain absorption because my crush is too fine or coarse? And I do a iodine conversion test. I crush grain at 1mm or 1.2mm with a MashMaster Mini. This allows 24 x 750ml bottles = 18L (batch volume) without picking up much trub etc. I use 27L post boil because of losses to fill two 10L fermenters.
So post-brew, my actual BIAB Grain Absorb is 0.8534 fl/oz and not 0.5860 fl/oz.įor boiling, my actual evaporation rate was 6.1% (not 13%) with only 1.89L evaporation per hour (not 4L). On my last brew, Beersmith calculated the following pre-brew: I'm using a Brewhouse Efficiency of 68% at the moment but the last brew was 66.3%. I'm consistently 10 points lower than I should be (e.g. Is grain absorption the right field to be looking at? If so, does anyone have a suggestion for the proper rate (I'm sure I could figure it out, but math isn't my strong suit).I'm trying to nail down an efficiency problem from the last five or so brews.
My losses (trub, chiller, etc) were consistent with expectations and my gravities were dead on. I know I could just pull the bag sooner, but I'd like to keep things accurate and only collect as much water as is necessary. My grain absorption in this equipment profile is currently set to 0.293 qt/lb with a water/grain ratio of 2 qt/lb.
Here are my details:ĥ.5 gallons (with more left in the kettle) However, I ended up with more wort than I needed from the mash, which translated into extra wort in the fermenter. I had been dealing with my OG ending up a couple of points low consistently across several brews (despite pre-boil gravity being dead on), but after careful measuring of losses and evaporation, my latest brew settings nailed the gravities. My newish eBIAB setup never had a profile in Beersmith, so I can't really compare. I've been working to dial in my equipment profile on Brewfather, and I think I'm getting close, but I may need some help on grain absorption.
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