I've seen the temp vs pressure charts for force carbonation. Say I've lost track a bit, but I know the quantity of beer in a keg, the temperature it is at and the current pressure in the headspace, can I reverse things and work out how much gas is in there, at least if the temp remains stable for a while?
I can't get my keg in the fridge yet (because another brew is in the way) so it's been force carbing in a rather hot garage, with the regulator set to no more than ~6psi, just to stay on the cautious side. The temp has varied between maybe 12c and more recently 28C. The pressure in the headspace is now around 12psi (presumably because of the temperature rise). The gas has been disconnected for a few days.
I know that once I can get it in the fridge, nice and stable at 11C or so, I will see where I'm at, but I just wonder if the maths can work out where it's at in the meantime.
Another force-carb pressure question
Another force-carb pressure question
Busy in the Summer House Brewery
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BrewBoyJoe
Re: Another force-carb pressure question
http://www.800mainstreet.com/9/0009-006-henry.html
The above link show's Henry's law and how to apply this! Perhaps you can bang it into excel! Hopefully the constants you need for Co2 will be googleable!
The above link show's Henry's law and how to apply this! Perhaps you can bang it into excel! Hopefully the constants you need for Co2 will be googleable!
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BrewBoyJoe
Re: Another force-carb pressure question
with regards to your warm beer and working out the best way to force carb this! I set out to do this myself and then flash cool at time of dispensing through a maxi 110 chiller! The charts suggested with ambient temp about 18 C, so that takes it to approx 30 psi to deliver 2.64 vol co2 (ipa levels)! But when coming to dispensing it was just foam which when dissipated left flat beer! I think I needed to play with the line lengths to bleed off this pressure and there are various equations... of I suspect varying relevance to the reality of the situation online! And perhaps I never got the gas equilibrium right anyway! I reckon this is going to be an empirical solution rather than mathematical exercise! I hope it works out for you. Let us know how you get on!
I gave up pretty quickly opting to buy a fridge for two kegs since I never got the correct level of carbonation! I appreciate your situation is a bit different. Hope you have better luck than I did. I don't regret buying the fridge since it actually saves space to put all the stuff in and maybe I can have a go at lagering, cold crashing beers etc.. and the beer should last longer!
I gave up pretty quickly opting to buy a fridge for two kegs since I never got the correct level of carbonation! I appreciate your situation is a bit different. Hope you have better luck than I did. I don't regret buying the fridge since it actually saves space to put all the stuff in and maybe I can have a go at lagering, cold crashing beers etc.. and the beer should last longer!