Direct heating, indirect cooling.
直接加热，间接冷却。
Two refrigeration methods are commonly used in cold storage warehouse : direct cooling of one unit to one house with freon , indirect cooling 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。
For the indirect cooling method, glycol liquid as the secondary coolant is cooled in the refrigerating unit, pumped to the cooler in the house to cool the air.
乙二醇间接制冷方式是通过低温盐水机组将乙二醇降到一定温度，通过循环泵将乙二醇溶液供到需要制冷的气调库内换热器中，再由换热器对库内环境进行制冷。
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