Two refrigeration methods are commonly used in cold storage warehouse : direct cooling of one unit to one house with freon , indirectcooling with glycol.
以往的冷库中冷源有两种方式，一种是氟利昂机组单机对单个冷库直接制冷方式，一种是乙二醇间接制冷方式。
3
For the indirectcooling method, glycol liquid as the secondary coolant is cooled in the refrigerating unit, pumped to the cooler in the house to cool the air.