Efficiencies

Discussion in 'General Brewing Discussions' started by Nola_Brew, Nov 3, 2015.

  1. Nola_Brew

    Nola_Brew Active Member

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    I've been keeping track of my efficiencies for each brew session but I'm now doubting if I am inputting the right info. I am a BIAB brewer. Can someone review and let me know if I am calculating these right?

    Conversion Efficiency= preboil gravity + total water used
    Preboil Efficiency= preboil gravity + total water used
    Ending Kettle= post boil gravity + ending kettle volume before draining.
    Brewhouse= post boil gravity + volume of wort into fermenter

    My last batch was a 2.5 gallon IPA. total water volume was 4.4 gallons.
    preboil gravity was 1.055
    post boil gravity was 1.082
    Conversion efficiency came to 99.4% which doesn't seem right. ( used 1.055 for the preboil gravity and 4.4 gal for total water)
    Preboil efficiency was 91% (used 1.055 for preboil gravity and 4.4 gal for total water)
    Ending Kettle was 77% (used 1.082 for the post boil gravity and 2.5 gal for ending kettle volume before draining).
    Brewhouse was 69% (used 1.082 for the post boil gravity and 2.25 gallon wort volume into the fermenter)
     
  2. MrBIP

    MrBIP Active Member

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    Here's what I read:

    http://www.brewersfriend.com/faq/#brewsessions5

    Conversion Efficiency= preboil gravity + total water used << Yes
    Preboil Efficiency= preboil gravity + total volume in kettle before boil
    Ending Kettle= post boil gravity + ending kettle volume before draining. << Yes
    Brewhouse= post boil gravity + volume of wort into fermenter << Yes

    And re-reading that made me realize just now that I've been inputting incorrectly for conversion efficiency all along since I'm recording volume in the kettle, not total water used. Which is, whatever, I'm really most concerned with overall efficiency anyway.

    Can't really comment on what %'s and what you should expect. I batch sparge and typically land 70-72% brewhouse efficiency.
     
  3. LlewellynBrewHaus

    LlewellynBrewHaus Active Member

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    Hey Nola b .. For what it's worth I also biab and for my first 2 session I've got ave efficiencies
    Of 84.4% on conversion (double crush) 70min
    77% ending kettle
    And 68% on my brew house
    My 2 cents :)
     

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