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Old 11-07-2012, 05:30 PM   #1
wiescins
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I'm looking at adding Cherry juice to a batch that has already completed fermentation (1.083 to 1.020). How do I figure out the ABV change after this ferments out? The batch is currently 4gal. I'm looking at adding 64oz of cherry juice (http://www.rwknudsenfamily.com/produ...st-tart-cherry).

 
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Old 11-07-2012, 06:46 PM   #2
TopherM
 
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192 grams of simple sugar (24g sugar/serving * 4 servings * 2 bottles) adds .0049 of fermentables to 4.0 gallons of wort/beer assuming 75% attenuation. That's 0.478% added to the final ABV:

http://brewedbyus.com/info/calculators/gravity/
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Old 11-07-2012, 07:10 PM   #3
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Quote:
Originally Posted by TopherM View Post
192 grams of simple sugar (24g sugar/serving * 4 servings * 2 bottles) adds .0049 of fermentables to 4.0 gallons of wort/beer assuming 75% attenuation. That's 0.478% added to the final ABV:

http://brewedbyus.com/info/calculators/gravity/
Plus the added water volume of the juice.

 
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Old 11-09-2012, 08:27 PM   #4
wiescins
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I'm thinking if I add the 64oz of cherry juice and 16oz of maple syrup, I'll just round up the ABV to 9% I think that is at least in the ball park.

 
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Old 11-11-2012, 04:32 PM   #5
wiescins
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So I added the Cherry Juice and Maple Syrup yesterday. Today I was trying to use Hopville to understand the ABV contribution and got some very different results.

I weighed everything before adding and it came out to 4lb 7oz of Cherry Juice and 1lb 8oz of Maple Syrup. Putting that into hopville and estimating a batch volume of 4.7gal (had 4gal + volume of additions), it looks like it is going to be about a 3% ABV bump. That is much more than I was expecting. Which is correct?

Here is the link to the Hopville calcuation (http://hopville.com/recipe/1660612).

 
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Old 11-12-2012, 02:54 AM   #6
Calder
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Quote:
Originally Posted by wiescins View Post
So I added the Cherry Juice and Maple Syrup yesterday. Today I was trying to use Hopville to understand the ABV contribution and got some very different results.

I weighed everything before adding and it came out to 4lb 7oz of Cherry Juice and 1lb 8oz of Maple Syrup. Putting that into hopville and estimating a batch volume of 4.7gal (had 4gal + volume of additions), it looks like it is going to be about a 3% ABV bump. That is much more than I was expecting. Which is correct?

Here is the link to the Hopville calcuation (http://hopville.com/recipe/1660612).
Cherry juice is 24g of sugar per 8 ozs. In 4 lb 7 ozs = 213 grams. They are talking about fl ozs vs weight, so you will have slightly less since the cherry juice will weigh slightly more than water due to the sugar. Say about 200 grams; That's close to 7 ozs of cane sugar, or about 20 points total for the 4 lbs 7 ozs.

1 lb Maple syrup is about 36 points, so 1.5 lbs = 54 points.

The total added points was about 74.

You had 4 gallons of 1.084 OG beer: Total points = 84 x 4 = 336

Add to that the 74 points for your additions (= 410), and divide by the new volume of 4.7 gallons, results in an effective OG of 1.087. Use this for calculating your abv once you measure the FG.

There are some inaccuracies in this, but it is close. You might get an abv bump of about 0.4%, not 3%.

 
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Old 11-12-2012, 03:23 PM   #7
wiescins
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Thank you!

 
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Old 12-14-2012, 08:47 PM   #8
Mead
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Quote:
Originally Posted by wiescins View Post
I'm looking at adding Cherry juice to a batch that has already completed fermentation (1.083 to 1.020). How do I figure out the ABV change after this ferments out? The batch is currently 4gal. I'm looking at adding 64oz of cherry juice (http://www.rwknudsenfamily.com/produ...st-tart-cherry).
I use the cherry concentrate from fruit fast at about 5 to 1 http://www.brownwoodacres.com/cherry-juice-concentrate/

 
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