I'm curious, I've just started getting into Kegging so am still definitely new around how to carbonate in the keg, and how to get that to actually work correctly.
Looking at say this site http://www.homebrewsupply.com/wp/wp-content/uploads/2016/02/carbonation_cart.png if I have my beer at 38 degrees, I can carbonate with 3 PSI for a Stout/Porter to achieve 1.71 carbonation level, all good. However if my beer is 1 degree warmer at 39, the minimum seems to be 5 PSI to get 1.86 carbonation level, even though in theory 4 PSI is still 1.77 carbonation level.
Can anyone explain why that is the case? I'm just curious but it's struck me as odd.
Looking at say this site http://www.homebrewsupply.com/wp/wp-content/uploads/2016/02/carbonation_cart.png if I have my beer at 38 degrees, I can carbonate with 3 PSI for a Stout/Porter to achieve 1.71 carbonation level, all good. However if my beer is 1 degree warmer at 39, the minimum seems to be 5 PSI to get 1.86 carbonation level, even though in theory 4 PSI is still 1.77 carbonation level.
Can anyone explain why that is the case? I'm just curious but it's struck me as odd.