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BeerTools Discussion Forum • View topic - Frozen grain=amazing mash efficiency?

Frozen grain=amazing mash efficiency?

Physics, chemistry and biology of brewing. The causes and the effects.

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Re: Formula for mash efficiency.

Postby etbandit » Sat Dec 09, 2006 10:07 pm

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Re: Formula for mash efficiency.

Postby billvelek » Sun Dec 10, 2006 1:57 am

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Re: Formula for mash efficiency.

Postby Mesa Maltworks » Tue Dec 26, 2006 1:52 pm

..."What you really need is a formula so that you don't need values form BTP; I'm sure there is one out there somewhere, but I have no idea where to look."


I can supply the correct efficiency equations if you can specifically state what you are looking to determine.

One point that is important to mention: if you read a malt analysis sheet, they list the congress mash (a lab proceedure where they turn all of the malt into a fine powder and mash it for 15 minutes) result to give the figure for the FG/DB (fine grind, dry basis). Even when mashing in this way the MAXIMUM efficiency you can get is 86%. The results in all commercial breweries are lower than that (my average brewhouse efficiency is 82%) and for homebrewing the efficiency tends to be even lower (average is 70%). I continuously see homebrewers who state that they have 90-100% efficiency. This is impossible and I can only guess they are getting actual efficiency confused with getting 90 to 100% of what they calculated when formulating a recipe. The most important measurement point is where you end up after you knock out the wort to fermenting temperature. When you measure the SG and the actual volume prior to the onset of fermentation you can use this to determine your whole brewing efficiency, not just the mash efficiency.
Make your next beer (or spirit) a local one!!!!

Eric Watson
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Re: Frozen grain=amazing mash efficiency?

Postby pcharles » Sun Apr 22, 2007 10:57 pm

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Re: Formula for mash efficiency.

Postby pcharles » Sun Apr 22, 2007 11:13 pm

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Loss of grain aroma/flavour from pre-crushed grain?

Postby etbandit » Wed Apr 25, 2007 10:34 pm

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