In a cascade system, the condensing refrigerant in one stage is used to evaporate the refrigerant in another stage .

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In a cascade system, the high temperature refrigerant of one stage is used to condense the low temperature refrigerant of another stage, and in turn, the low temperature refrigerant is used to evaporate the refrigerant in another stage. This allows for greater efficiency in heat transfer and energy savings.

In a Cascade System, the Condensing Refrigerant in One Stage