Bulk Priming - Conflicting Advice

[slotmachine]

I'm a little confused here and need some clarification.

If I have a beer that's max ferment temp was 20C and I want 3.0 volumes of CO2 to carbonate (priming with dextrose) in a 23L batch I get the following results;

Using IanH's spreadsheet or this calculator -> http://www.aussiehomebrewing.com/AlcoholCh...Calculator.html

197-198g of dextrose

Using this guide http://oz.craftbrewer.org/Library/Methods/...icalGuide.shtml -> or this guide http://www.brewery.org/library/YPrimerMH.html

224-230g of dextrose


Why the difference?

 

[Screwtop]

I'm a little confused here and need some clarification.

If I have a beer that's max ferment temp was 20C and I want 3.0 volumes of CO2 to carbonate (priming with dextrose) in a 23L batch I get the following results;

Using IanH's spreadsheet or this calculator -> http://www.aussiehomebrewing.com/AlcoholCh...Calculator.html

197-198g of dextrose

Using this guide http://oz.craftbrewer.org/Library/Methods/...icalGuide.shtml -> or this guide http://www.brewery.org/library/YPrimerMH.html

224-230g of dextrose


Why the difference?

No Idea! But didn't spend much time looking at how they arrive at the figures contained in the tables.

I get 197g using the calculator tool in Beersmith, I would use that. What ever happened to the online calculator we used years ago, it was good and took the gravity of the finished beer into account also. Can't find any ref to the site, must do a search back through my posts, as it was one I recommended years ago.

Cheers,

Screwy

EDIT: Looks like the figures you have may be for Dextrose in the second example and Sugar in the first. Couldn't find the priming rate calculator that I used to use. But one you can download was posted by doc back in 2005 HERE is the link.

Here is another similar to the one you posted, this one from the Knights Of The Mashing Fork http://kotmf.com/tools/prime.php

 

[manticle]

I use the carbonation calculator here: http://hbd.org/recipator/ and I got 198g of corn sugar for the figures you posted.

My guess is either you may have made an error entering in one of the pieces of data or one of the calculators is shonky. If beersmith, ianh and beer recipator all give you the same then I'd go with that.

 

[TidalPete]

What ever happened to the online calculator we used years ago, it was good and took the gravity of the finished beer into account also. Can't find any ref to the site, must do a search back through my posts, as it was one I recommended years ago.

If that was the "Beer is Good" priming calculator I stuck it away on CD a long time ago. A quick Google will probably find it?

slotmachine,
if you are willing to do a little maths I have found THIS doc a great help over the years. Don't worry about how old it is the principles still aply.

TP

PS --- Big error Screwy "Beer is Good" is not an online calculator so it's not the one but I'll leave the post the way it is for information to others.
Still too careless reading posts sometimes.

 

[Screwtop]

not an online calculator so it's not the one but I'll leave the post the way it is for information to others.

Buggered if I can find it Pete, have changed PC's and hard drives twice in that time, thought I had a ref to it somewhere. It required the OG, FG, Ferm Temp, Volume and Carbonation level in volumes, was a great tool.

Screwy

 

[TidalPete]

If that was the "Beer is Good" priming calculator I stuck it away on CD a long time ago. A quick Google will probably find it?

slotmachine,
if you are willing to do a little maths I have found THIS doc a great help over the years. Don't worry about how old it is the principles still aply.

TP

PS --- Big error Screwy "Beer is Good" is not an online calculator so it's not the one but I'll leave the post the way it is for information to others.
Still too careless reading posts sometimes.

For those interested here is the link to the "Beer is Good" calculator (Post 16) ---- Linky.

TP