Indirect cooling method: the refrigerant is a mixture of ethanol or glycol and water, it is cooled in the evaporator box of the ammonia refrigerator, the temperature is generally controlled at around -5°C, the refrigerant flows in from below and out from above.Direct cooling method: The refrigerant

Beer is carbonated because carbon dioxide gas is dissolved in it. The carbon dioxide gas forms when yeast ferments the sugar in the beer. The carbon dioxide gas makes the beer fizzy and gives it its carbonation. Carbonation also helps to preserve the beer and prevent it from going bad.Carbonation ca

The freezing point temperature at which beer or fermentation liquid freezes can be calculated by referring to the following formula:T ice = - (alcohol content × 0.42 + wort concentration × 0.04 + 0.2)