The cooling medium, or coolant, in them is either water or some low-freezing liquid, called antifreeze. 系统所用冷却介质或是冷却液常委水或其他低凝固点液体，称为抗凝剂。
The units use a coolant that is pumped as a refrigerated liquid to the modules, where the coolant is then vaporized as a gas that absorbs heat. 单位使用的冷却剂是泵浦作为一个冷冻液的模块，如冷却液汽化，然后是作为一种气体，这种气体吸收热量。
