Posts Tagged ‘techniques’

CO2 Consumption Calculator

Wednesday, September 29th, 2010

Someone on Reddit was wondering how many kegs a cylinder of CO2 would carbonate.  Using some constants from Wikipedia and absolutely no gas expansion temperature correction I made a quick spreadsheet to estimate the number.  Feel free to play with the input numbers to fit  your situation.   Here it is!

The gas density constant I used was calculated @ 32F, and with most kegerators being in the low 40s I figured this was close enough.

The “too long, didn’t read it” answer: for a 5 pound tank you’ll be able to force-carb about 17 5-gallon batches @ 2.5 volumes.

Below are the full equations I used.

Barrel Simulation Experiment

Monday, March 17th, 2008

In the summer of 2006 I tried to replicate J.W. Lee’s Barrel-Aged Harvest Ale Series by soaking wood chips in alcohol and then blending with a barley wine. The Harvest Ales are truly wonderful beers and I was hoping to recreate the cohesive set of pure, clean flavors that these beers have (try them for yourself and see what I mean).

I went out and bought 4 different kinds of alcohol and three kinds of wood chips:

  • Old Fitzgerald Bourbon
  • Benjamin Australian Tawny Port
  • Sheffield Cream Sherry
  • Early Times Kentucky Whiskey
  • American Oak
  • French Oak (Medium Toast)
  • Hungarian Oak (House Toast)

As you can see I didn’t drop a lot of coin on the booze. From these I made up 5 jars of wood ‘n alcohol:

  • Bourbon / America
  • Port / French
  • Sherry / America
  • Whiskey / French
  • Bourbon / Hungarian

Labelled Sample Jars

Close
Each jar had a unique combination of alcohol and wood.

I made these up about 3 months before the beer was brewed.
Jar Closeup
Close
This is American Oak on Sherry

The beer was a 5-gallon batch of Harvest Ale clone; 20 pounds of Marris Otter and a bunch of EKG (2oz FWH, 1.5oz @ 90, 1oz @ 15, 2oz @ 5) all on a WLP 002 cake. OG was 1.096 and it finished at 1.023. This was only my 9th batch so I wasn’t as well tuned-in to proper fermentation temperatures as I am now so this thing fermented a bit hot causing the yeast to throw off some green pepper fusels. From my notes it looks like ambient was around 76F! This led to a lesser beer but not enough to wreck the experiment. After 6 weeks in secondary the beer was split five ways – 4, 1 gallon jugs each with their own alcohol blend and the last gallon as a control subject. Unfortunately I didn’t write down how much of the wood & alcohol I put into each jug; it was around 4-5 chunks of wood and a short pour of the “broth”.

I left the jugs to age for a few months before bottling those. By now the peppery alcohol has died down some leaving the too-high finishing gravity to be the big flaw. The wood and alcohol essence turned out very well; not overpowering but also noticeable. I’m sipping on a Bourbon / Hungarian Oak right now and if the base beer had been better this would a contest-worth brew. The other thing I would do differently is to add a dose of fresh yeast at bottling; these things don’t have much carbonation because of the long time (2-3 months) before bottling. As mentioned earlier I used cheap alcohol for this experiment and in hindsight it was the right decision because all the nasty alcohol evaporates away after sitting in the jars for a few months.

Wardley’s Chlor Out

Friday, March 7th, 2008

Picked up a bottle of Wardley’s Chlor Out today from Wally World to try to get rid of the (slight) chlorine taste in our water. Milwaukee now uses chloramines so one can’t simply leave their brewing water out overnight for the chlorine to dissipate. I’m doing a taste test with plain water and the results are very good. The recommended dosage is 1/2 teaspoon per 10 gallons so I’m adding about 0.02mL to a 1.5c glass of water. Even with that very small amount the stuff works very well.  I’ve never thought our water had a bad taste in the first place but I swear that I can taste chlorine in some of my lighter beers – for $2.14 per bottle I can’t go wrong.

After a few minutes the chlorine odor is gone and after a half hour there’s only a slight chlorine/mineral thing in the finish, and overnight I can’t detect any off-tastes.  A “control” sample that had been sitting out for the same amount of time has a much more noticeable taste.

As for the “is it food safe question”? I figure if a product is to be used for sensitive tropical fish it’s OK to drink in such a small dilution. I reckon they say to not use it for food because they wouldn’t FDA approval for a pet product.