Nerd time..
This is how I see it. Beer at 18C will hold 0.92 volumes of CO2, beer at 3C will hold 1.54 volumes. So if you cold crash 23 liters of beer from 18C down to 3C it will take up 1.54 - 0.92 = 0.62 volumes or 0.62 x 23L = 14.3L of CO2. If the headspace in the primary fermenter does not...