Author Topic: Promash and sugar efficiency  (Read 1076 times)

Offline aaronwesternny

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Promash and sugar efficiency
« on: July 01, 2010, 03:46:57 PM »
In Promash you can select your efficiency, say 75%.  Sugar essentially converts 100% leaving no unfermentables (assuming no ferment problems).  Does anyone know if when you select a sugar as an ingredient, is promash figuring 75% brewhouse conversion or does it figure 100%?

Online denny

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Re: Promash and sugar efficiency
« Reply #1 on: July 01, 2010, 04:05:27 PM »
It figures 100%.
Life begins at 60.....1.060, that is!

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Offline aaronwesternny

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Re: Promash and sugar efficiency
« Reply #2 on: July 02, 2010, 05:36:57 AM »
How do you know this for sure?

Online denny

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Re: Promash and sugar efficiency
« Reply #3 on: July 02, 2010, 08:24:07 AM »
Start a new Promash recipe.  Add a lb. of cane sugar.  Change the efficiency in the recipe.  The predicted SG doesn't change.
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Offline mainebrewer

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Re: Promash and sugar efficiency
« Reply #4 on: July 02, 2010, 08:27:26 AM »
Sugar will give you 45 points per pound per gallon.
Take note of the ProMash receipe estimated OG with the sugar, then delete the sugar from the ingredient list, take note of the OG without the sugar.
For the sake of discussion, assume the batch size is 5 gallons and you are adding 1 pound of sugar, dividing the 45 points for a pound of sugar by the 5 gallons, the difference between the two OG numbers should be 9, if ProMash assumes 100% efficiency for sugar.  
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Offline aaronwesternny

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Re: Promash and sugar efficiency
« Reply #5 on: July 02, 2010, 10:56:05 AM »
That is thorough, thanks a bunch.  Now I have one more thing dialed in during my brew day. 

Offline a10t2

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Re: Promash and sugar efficiency
« Reply #6 on: July 02, 2010, 03:17:09 PM »
I just feel the need to point out that it's 46.21 point-gal/lb. ;)
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Offline bonjour

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Re: Promash and sugar efficiency
« Reply #7 on: July 05, 2010, 06:16:08 AM »
I just feel the need to point out that it's 46.21 point-gal/lb. ;)
doesn't that depend on the degree of hydration  :-\
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Offline a10t2

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Re: Promash and sugar efficiency
« Reply #8 on: July 05, 2010, 07:33:11 AM »
Technically, yes, but at 100% RH sucrose retains 0.084% water by mass. Below my radar, for sure. ;)
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